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  • 1.
    Andersson, Mike
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Bastuk, Manuel
    Saarland University, Saarbruecken, Germany.
    Huotari, Joni
    University of Oulu, Finland.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Schütze, Andreas
    Saarland University, Saarbruecken, Germany.
    Lappalainen, Jyrki
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Optimization of the Field Effect Transistor transducer platform for the development of air quality sensors2016In: Proceedings EMRS 2016, 2016Conference paper (Refereed)
  • 2.
    Andersson, Mike
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Recent progress in silicon carbide field effect gas sensors2020In: Semiconductor gas sensors / [ed] Raivo Jaaniso and Ooi Kiang Tan, Oxford: Woodhead Publishing Limited, 2020, 2, p. 309-346Chapter in book (Refereed)
    Abstract [en]

    The introduction of silicon carbide as the semiconductor in gas-sensitive field effect devices has disruptively improved this sensor platform extending the operation temperature to more than 600 °C with an increased number of detectable gases. Here, we review recent progress in research and applications, starting with transducer and detection mechanisms, presenting new material combinations as sensing layers for improved selectivity and detection limits down to subparts per billion. We describe how temperature cycled operation combined with advanced data evaluation enables one sensor to act as a sensor array thereby vastly improving selectivity. Field tests require advanced packaging, which is described, and examples of possible applications like selective detection of ammonia for urea injection control in diesel exhausts and toxic volatile organic compounds for indoor air quality monitoring and control are given.

  • 3.
    Bastuck, Manuel
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering. Saarland University, Lab for Measurement Technology, Germany.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Schuetze, Andreas
    Saarland University, Saarbrücken, Germany.
    Sauerwald, Tilman
    Saarland University, Saarbrücken, Germany.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    UV-assisted gate bias cycling in gas-sensitive field-effect transistors2018In: Proceedings, ISSN 2504-3900, Vol. 2, no 13, article id 999Article in journal (Refereed)
    Abstract [en]

    Static and dynamic responses of a silicon carbide field-effect transistor gas sensor have been investigated at two different gate biases in several test gases. Especially the dynamic effects are gas dependent and can be used for gas identification. The addition of ultraviolet light reduces internal electrical relaxation effects, but also introduces new, temperature-dependent effects.

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  • 4.
    Bastuck, Manuel
    et al.
    Saarland University, Lab for Measurement Technology, Germany.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Möller, Peter
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Reimringer, Wolfhard
    3S GmbH, Saarbrücken, Germany.
    Schuetze, Andreas
    Saarland University, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Low-cost chemical gas sensors for selective formaldehyde quantification at ppb-level in field tests2017Conference paper (Refereed)
    Abstract [en]

    Data from a silicon carbide based field-effect transistor were recorded over a period of nine days in a ventilated school room. For enhanced sensitivity and selectivity especially to formaldehyde, porous iridium on pulsed laser deposited tungsten trioxide was used as sensitive layer, in combination with temperature cycled operation and subsequent multivariate data processing techniques. The sensor signal was compared to reference measurements for formaldehyde concentration, CO2 concentration, temperature, and relative humidity. The results show a distinct pattern for the reference formaldehyde concentration, arising from the day/night cycle. Taking this into account, the projections of both principal component analysis and partial least squares regression lead to almost the same result concerning correlation to the reference. The sensor shows cross-sensitivity to an unidentified component of human activity, presumably breath, and, possibly, to other compounds appearing together with formaldehyde in indoor air. Nevertheless, the sensor is able to detect and partially quantify formaldehyde below 40 ppb with a correlation to the reference of 0.48 and negligible interference from ambient temperature or relative humidity.

  • 5.
    Bertuccio, Giuseppe
    et al.
    Politecnico di Milano, Como Campus, Italy.
    Caccia, Stefano
    Politecnico di Milano, Como Campus, Italy.
    Nava, Filippo
    Modena and Reggio Emilia University, Italy.
    Foti, Gaetano
    University of Catania, Italy.
    Puglisi, Donatella
    University of Catania, Italy.
    Lanzieri, Claudio
    Lavanga, S.
    Abbondanza, G.
    Crippa, D.
    Preti, F.
    Ultra Low Noise Epitaxial 4H-SiC X-Ray Detectors2009In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 615-617, p. 845-848Article in journal (Refereed)
    Abstract [en]

    The design and the experimental results of some prototypes of SiC X-ray detectors are presented. The devices have been manufactured on top of 2 inch 4H-SiC wafer with 115 μm thick undoped high purity epitaxial layer, which constitutes the detection’s active volume. Pad and pixel detectors based on Ni-Schottky junctions have been tested. The residual doping of the epi-layer was found tobe extremely low, 3.7 x 1013 cm-3, allowing to achieve the highest detection efficiency and the lower specific capacitance of the detectors. At 22 °C and in operating bias condition, the reverse current densities of the detector’s Schottky junctions have been measured to be between J = 0.3 pA/cm2 and J = 4 pA/cm2; these values are more than two orders of magnitude lower than those of state of the art silicon detectors. With such low leakage currents, the equivalent electronic noise of SiC pixel detectors is as low as 0.5 electrons r.m.s at room temperature, which represents a new state of the art in the scenario of semiconductor radiation detectors.

  • 6.
    Bertuccio, Giuseppe
    et al.
    Politecnico di Milano, Como Campus, Italy.
    Caccia, Stefano
    Politecnico di Milano, Como Campus, Italy.
    Puglisi, Donatella
    Politecnico di Milano, Como Campus, Italy.
    Macera, Daniele
    Politecnico di Milano, Como Campus, Italy.
    Advances in silicon carbide X-ray detectors2011In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 652, no 1, p. 193-196Article in journal (Refereed)
    Abstract [en]

    The latest advances in SiC X-ray detectors are presented: a pixel detector coupled to a custom ultra-low noise CMOS preamplifier has been characterized at room and high temperature. An equivalent noise energy (ENE) of 113 eV FWHM, corresponding to 6.1 electrons r.m.s., has been achieved with the detector/front- end system operating at 30 °C. A Fano factor of F = 0.10 has been estimated from the 55Fe spectrum. When the system is heated up to 100 °C, the measured ENE is 163 eV FWHM (8.9 electrons r.m.s.). It is determined that both at room and at high temperature the performance are fully limited by the noise of the front-end electronics. It is also presented the capability of SiC detectors to operate in environments under unstable temperature conditions without any apparatus for temperature stabilization; it has been proved that a SiC detector can acquire high resolution X-ray spectra without spectral line degradation while the system temperature changes between 30 °C and 75 °C.

  • 7.
    Bertuccio, Giuseppe
    et al.
    Politecnico di Milano, Como Campus, Italy.
    Puglisi, DonatellaPolitecnico di Milano, Como Campus, Italy.Lanzieri, Claudio
    Silicon Carbide Microstrip Detectors for High Resolution X-Ray Spectroscopy2012Conference proceedings (editor) (Refereed)
    Abstract [en]

    Silicon Carbide (SiC) is a wide bandgap semiconductor with outstanding physical properties for realizing ionizing radiation detectors. We present the manufacturing, electrical and spectroscopic characterization of a prototype SiC microstrip detector constituted by 32 strips, 2 mm long, 25 μm wide with 55 μm pitch. The detectors have been fabricated on 115 μm thick undoped epitaxial 4H-SiC using Ni-SiC Schottky junctions. The measured leakage currents are below 5 fA at 25 °C and 0.6 pA at 107 °C with internal electric fields up to 30 kV/cm. X-ray spectra from 55Fe and 241Am with energy resolution of 224 eV FWHM and 249 eV FWHM (12-13.5 electrons r.m.s.) have been acquired at 20 °C and 80 °C, respectively.

  • 8.
    Bertuccio, Giuseppe
    et al.
    Department of Electronics, Information and Bioengineering, Politecnico of Milano, Como, Italy.
    Puglisi, Donatella
    Department of Electronics, Information and Bioengineering, Politecnico of Milano, Como, Italy.
    Macera, Daniele
    Department of Electronics, Information and Bioengineering, Politecnico of Milano, Como, Italy.
    Di Liberto, Riccardo
    Department of Medical Physics, IRCCS Fondazione Policlinico San Matteo, Pavia, Italy.
    Lamborizio, Massimiliano
    Department of Medical Physics, IRCCS Fondazione Policlinico San Matteo, Pavia, Italy.
    Mantovani, Laura
    Department of Medical Physics, IRCCS Fondazione Policlinico San Matteo, Pavia, Italy.
    Silicon Carbide Detectors for in vivo Dosimetry2014In: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 61, no 2, p. 961-966Article in journal (Refereed)
    Abstract [en]

    Semiconductor detectors for in vivo dosimetry haveserved in recent years as an important part of quality assurancefor radiotherapy. Silicon carbide (SiC) can represent a bettersemiconductor with respect to the more popular silicon (Si) thanksto its physical characteristics such as wide bandgap, high electronsaturation velocity, lower effective atomic number, and high radiationresistance to X and gamma rays. In this article we present aninvestigation aimed at characterizing 4H-SiC epitaxial Schottkydiodes as in vivo dosimeters. The electrical characterization atroom temperature showed ultra low leakage current densities aslow as 0.1 pA/cm at 100 V bias with negligible dependence ontemperature. The SiC diode was tested as radiotherapy dosimeterusing 6 MV photon beams from a linear accelerator in a typicalclinical setting. Collected charge as a function of exposed radiationdose were measured and compared to three standard commerciallyavailable silicon dosimeters. A sensitivity of 23 nC/Gy withlinearity errors within 0.5% and time stability of 0.6% wereachieved. No negligible effects on the diode I-V characteristicsafter irradiation were observed.

  • 9.
    Bertuccio, Giuseppe
    et al.
    Politecnico di Milano, Como Campus, Italy.
    Puglisi, Donatella
    Politecnico di Milano, Como Campus, Italy.
    Pullia, Alberto
    University of Milano, Italy.
    Lanzieri, Claudio
    Selex Sistemi Integrati S.p.A., Rome, Italy.
    X-γ Ray Spectroscopy With Semi-Insulating 4H-Silicon Carbide2013In: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 60, no 2, p. 1436-1441Article in journal (Refereed)
    Abstract [en]

    Radiation detectors on a semi-insulating (SI) 4H siliconcarbide (SiC) wafer have been manufactured and characterizedwith X and photons in the range 8–59 keV. The detectors were 400 μm diameter circular Ni-SiC junctions on an SI 4H-SiC wafer thinned to 70 μm. Dark current densities of 3.5 nA/cm2 at 20 °C and 0.3 μA/cm2 at 104 °C with an internal electric field of 7 kV/cm have been measured. X-γ ray spectra from 241Am have been acquired at room temperature with pulser line width of 756 eV FWHM. The charge collection efficiency (CCE) has been measured under different experimental conditions with a maximum CCE = 75 % at room temperature. Polarization effects have been observed, and the dependence of CCE on time and temperature has been measured and analyzed. The charge trapping has been described by the Hecht model with a maximum totalmean drift length of 107 μm at room temperature.

  • 10.
    Bertuccio, Giuseppe
    et al.
    Politecnico di Milano, Como Campus, Italy.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Shi, Yongbiao
    Politecnico di Milano, Como Campus, Italy.
    Lanzieri, Claudio
    Silicon Carbide X-Ray Detectors Operating at Room and High Temperature2014Conference paper (Refereed)
    Abstract [en]

    Silicon Carbide (SiC) is a wide bandgap semiconductor with attractive physical properties for manufacturing X-ray detectors [1]. The density of SiC crystal allow an X‑ray absorption similar to Silicon. The wide bandgap of SiC (3.2 eV) allows to make high Schottky barriers and minimises the reverse current from thermal generation of charge carriers. The SiC breakdown field (2 MV/cm) and the high saturation velocities of the charge carriers (200 mm/ns) make the detector response very fast and not affected by charge trapping degradation.

    In this talk, we present the SiC X-ray detectors we have developed. The detectors show leakage current densities as low as J=0.1 pA/cm2 at +25°C, three orders of magnitude lower than those of the best silicon detectors and make SiC detectors practically noiseless at room temperature. The detectors have been tested also at high temperatures: at T=+100°C the J= 1 nA/cm2, allowing excellent X-ray spectrometry even at such high temperatures, forbidden to conventional semiconductor detectors. In addition we will show that our SiC detectors can also operate while the temperature is freely changing of tens of °C, without affecting spectra quality.

    The possibility to make the detector operating without any cooling system even at high temperature with adequate energy resolution can open new perspectives in X‑ray spectrometry applications, even ever considered before.

  • 11.
    Bertuccio, Giuseppe
    et al.
    Politecnico di Milano, Como Campus, Italy.
    Puglisi, Donatella
    Politecnico di Milano, Como Campus, Italy.
    Torrisi, Lorenzo
    University of Messina, Italy.
    Lanzieri, Claudio
    Selex Sistemi Integrati S.p.A., Rome, Italy.
    Silicon carbide detector for laser-generated plasma radiation2013In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 272, p. 128-131Article in journal (Refereed)
    Abstract [en]

    We present the performance of a Silicon Carbide (SiC) detector in the acquisition of the radiation emittedby laser generated plasmas. The detector has been employed in time of flight (TOF) configuration withinan experiment performed at the Prague Asterix Laser System (PALS). The detector is a 5 mm2 area 100 nmthick circular Ni SiC Schottky junction on a high purity 4H-SiC epitaxial layer 115 μm thick. Currentsignals from the detector with amplitudes up to 1.6 A have been measured, achieving voltage signals over 80 V on a 50 Ω load resistance with excellent signal to noise ratios. Resolution of few nanoseconds hasbeen experimentally demonstrated in TOF measurements. The detector has operated at 250 V DC biasunder extreme operating conditions with no observable performance degradation.

  • 12.
    Bur, Christian
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Saarland University, Lab for Measurement Technology, Germany.
    Bastuk, Manuel
    Saarland University, Lab for Measurement Technology, Germany.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Schuetze, Andreas
    Saarland University, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Discrimination and Quantification of Volatile Organic Compounds in the ppb-Range with Gas Sensitive SiC-FETs Using Multivariate Statistics2015In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 214, p. 225-233Article in journal (Refereed)
    Abstract [en]

    Gas sensitive field effect transistors based on silicon carbide, SiC-FETs, have been studied for indoor air quality applications. The selectivity of the sensors was increased by temperature cycled operation, TCO, and data evaluation based on multivariate statistics. Discrimination of benzene, naphthalene, and formaldehyde independent of the level of background humidity is possible by using shape describing features as input for Linear Discriminant Analysis, LDA, or Partial Least Squares – Discriminant Analysis, PLS-DA. Leave-one-out cross-validation leads to a correct classification rate of 90 % for LDA, and for PLS-DA a classification rate of 83 % is achieved. Quantification of naphthalene in the relevant concentration range, i.e. 0 ppb to 40 ppb, was performed by Partial Least Squares Regression and a combination of LDA with a second order polynomial fit function. The resolution of the model based on a calibration with three concentrations was approximately 8 ppb at 40 ppb naphthalene for both algorithms.

    Hence, the suggested strategy is suitable for on demand ventilation control in indoor air quality application systems.

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  • 13.
    Bur, Christian
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. Saarland University, Lab for Measurement Technology, Germany.
    Bastuk, Manuel
    Saarland University, Lab for Measurement Technology, Germany.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Schuetze, Andreas
    Saarland University, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Discrimination and Quantification of Volatile Organic Compounds in the ppb-Range with Gas Sensitive SiC-Field Effect Transistors2014Conference paper (Refereed)
    Abstract [en]

    Gas sensitive FETs based on SiC have been studied for the discrimination and quantification of hazardous volatile organiccompounds (VOCs) in the low ppb range. The sensor performance was increased by temperature cycled operation (TCO) anddata evaluation based on multivariate statistics, here Linear Discriminant Analysis (LDA). Discrimination of formaldehyde,naphthalene and benzene with varying concentrations in the ppb range is demonstrated. In addition, it is shown that naphthalenecan be quantified in the relevant concentration range independent of the relative humidity and against a high ethanol background.Hence, gas sensitive SiC-FETs are suitable sensors for determining indoor air quality.

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  • 14.
    Casalinuovo, Silvia
    et al.
    Sapienza University of Rome, Rome, Italy.
    Buzzin, Alessio
    Sapienza University of Rome, Rome, Italy.
    Caschera, Daniela
    National Research Council, Rome, Italy.
    Quaranta, Simone
    National Research Council, Rome, Italy.
    Federici, Fulvio
    National Research Council, Rome, Italy.
    Zortea, Laura
    Sapienza University of Rome, Rome, Italy.
    Brotzu, Andrea
    Sapienza University of Rome, Rome, Italy.
    Natali, Stefano
    Sapienza University of Rome, Rome, Italy.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    de Cesare, Giampiero
    Sapienza University of Rome, Rome, Italy.
    Caputo, Domenico
    Sapienza University of Rome, Rome, Italy.
    AuNP-coated cotton as VOC sensor for disease detection from breath2023In: Proceedings of SIE 2022: 53rd Annual Meeting of the Italian Electronics Society / [ed] Cocorullo, G., Crupi, F., Limiti, E, 2023, Vol. 1005Conference paper (Refereed)
    Abstract [en]

    The COVID-19 pandemic outbreak, declared in March 2020, has led to several behavioral changes in the general population, such as social distancing and mask usage among others. Furthermore, the sanitary emergency has stressed health system weaknesses in terms of disease prevention, diagnosis, and cure. Thus, smart technologies allowing for early and quick detection of diseases are called for. In this framework, the development of point-of-care devices can provide new solutions for sanitary emergencies management. This work focuses on the development of useful tools for early disease diagnosis based on nanomaterials on cotton substrates, to obtain a low-cost and easy-to-use detector of breath volatiles as disease markers. Specifically, we report encouraging experimental results concerning acetone detection through impedance measurements. Such findings can pave the way to the implementation of VOCs (Volatile Organic Compounds) sensors into smart and user friendly diagnostic devices.

  • 15.
    Casalinuovo, Silvia
    et al.
    Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Italy.
    Buzzin, Alessio
    Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Italy.
    Mastrandrea, Antonio
    Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Italy.
    Barbirotta, Marcello
    Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Italy.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    de Cesare, Giampiero
    Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Italy.
    Caputo, Domenico
    Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Italy.
    Questioning Breath: A Digital Dive into CO2 Levels2024Conference paper (Refereed)
    Abstract [en]

    This work presents a smart mask for real-time monitoring of carbon dioxide (CO2) levels asa reference tool for diagnosis, sports training and mental health status. A printed circuit board wasprojected and fabricated to gain data with real-time visualization and storage on a database, enablingremote monitoring as a needed skill for telemedicine purposes. The electronics were inserted in awearable device—shaped like a mask—and 3D-printed with biocompatible materials. The wholedevice was used for analyzing CO2 on a breath volunteer in three kinds of measurement.

  • 16.
    Casalinuovo, Silvia
    et al.
    Sapienza University of Rome, Italy.
    Buzzin, Alessio
    Sapienza University of Rome, Italy.
    Mastrandrea, Antonio
    Sapienza University of Rome, Italy.
    Mazzetta, Ivan
    Sapienza University of Rome, Italy.
    Barbirotta, Marcello
    Sapienza University of Rome, Italy.
    Iannascoli, Lorenzo
    Sapienza University of Rome, Italy.
    Nascetti, Augusto
    Sapienza University of Rome, Italy.
    de Cesare, Giampiero
    Sapienza University of Rome, Italy.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Caputo, Domenico
    Sapienza University of Rome, Italy.
    3D-Printed Face Mask with Integrated Sensors as Protective and Monitoring Tool2023In: Sensors and Microsystems: Proceedings of AISEM 2022 / [ed] Girolamo Di Francia, Corrado Di Natale, 2023, Vol. 999Conference paper (Refereed)
    Abstract [en]

    The outbreak of the recent Covid-19 pandemic changed many aspects of our daily life, such as the constant wearing of face masks as protection from virus transmission risks. Furthermore, it exposed the healthcare system’s fragilities, showing the urgent need to design a more inclusive model that takes into account possible future emergencies, together with population’s aging and new severe pathologies. In this framework, face masks can be both a physical barrier against viruses and, at the same time, a telemedical diagnostic tool. In this paper, we propose a low-cost, 3D-printed face mask able to protect the wearer from virus transmission, thanks to internal FFP2 filters, and to monitor the air quality (temperature, humidity, CO2) inside the mask. Acquired data are automatically transmitted to a web terminal, thanks to sensors and electronics embedded in the mask. Our preliminary results encourage more efforts in these regards, towards rapid, inexpensive and smart ways to integrate more sensors into the mask’s breathing zone in order to use the patient’s breath as a fingerprint for various diseases.

  • 17.
    Casalinuovo, Silvia
    et al.
    Sapienza University of Rome, Italy.
    Caschera, Daniela
    Institute for the Study of Nanostructured Materials CNR-ISMN, Italy.
    Quaranta, Simone
    Institute for the Study of Nanostructured Materials CNR-ISMN.
    Genova, Virgilio
    Sapienza University of Rome, Italy.
    Buzzin, Alessio
    Sapienza University of Rome, Italy.
    Federici, Fulvio
    Institute for the Study of Nanostructured Materials CNR-ISMN, Italy.
    de Cesare, Giampiero
    Sapienza University of Rome, Italy.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Caputo, Domenico
    Sapienza University of Rome, Italy.
    Cotone funzionalizzato con nanoparticelle d'oro come promettente substrato flessibile ed ecologico per il rilevamento impedometrico di COV [Gold Nanoparticles-Functionalized Cotton as Promising Flexible and Green Substrate for Impedometric VOC Detection]2023In: Materials, E-ISSN 1996-1944, Vol. 16, article id 5826Article in journal (Refereed)
    Abstract [en]

    This work focuses on the possible application of gold nanoparticles on flexible cotton fabric as acetone- and ethanol-sensitive substrates by means of impedance measurements. Specifically, citrate- and polyvinylpyrrolidone (PVP)-functionalized gold nanoparticles (Au NPs) were synthesized using green and well-established procedures and deposited on cotton fabric. A complete structural and morphological characterization was conducted using UV-VIS and Fourier transform infrared (FT-IR) spectroscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM). A detailed dielectric characterization of the blank substrate revealed interfacial polarization effects related to both Au NPs and their specific surface functionalization. For instance, by entirely coating the cotton fabric (i.e., by creating a more insulating matrix), PVP was found to increase the sample resistance, i.e., to decrease the electrical interconnection of Au NPs with respect to citrate functionalized sample. However, it was observed that citrate functionalization provided a uniform distribution of Au NPs, which reduced their spacing and, therefore, facilitated electron transport. Regarding the detection of volatile organic compounds (VOCs), electrochemical impedance spectroscopy (EIS) measurements showed that hydrogen bonding and the resulting proton migration impedance are instrumental in distinguishing ethanol and acetone. Such findings can pave the way for the development of VOC sensors integrated into personal protective equipment and wearable telemedicine devices. This approach may be crucial for early disease diagnosis based on nanomaterials to attain low-cost/low-end and easy-to-use detectors of breath volatiles as disease markers.

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  • 18.
    Domènech-Gil, Guillem
    et al.
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Nguyen, Thanh Duc
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Science & Engineering.
    Wikner, J. Jakob
    GE Healthcare, Linköping, Sweden.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Bastviken, David
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Efficient Methane Monitoring with Low-Cost Chemical Sensorsand Machine Learning2024Conference paper (Refereed)
    Abstract [en]

    We present a method to monitor methane at atmospheric concentrations with errors inthe order of tens of parts per billion. We use machine learning techniques and periodic calibrationswith reference equipment to quantify methane from the readings of an electronic nose. The resultsobtained demonstrate versatile and robust solution that outputs adequate concentrations in a varietyof different cases studied, including indoor and outdoor environments with emissions arising fromnatural or anthropogenic sources. Our strategy opens the path to a wide-spread use of low-costsensor system networks for greenhouse gas monitoring.

  • 19.
    Domènech-Gil, Guillem
    et al.
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Nguyen, Thanh Duc
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Science & Engineering.
    Wikner, Jacob
    Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Nilsson Påledal, Sören
    Tekn Verken & Linkoping AB, S-58115 Linkoping, Sweden.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Bastviken, David
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Electronic Nose for Improved Environmental Methane Monitoring2024In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 58, p. 352-361Article in journal (Refereed)
    Abstract [en]

    Reducing emissions of the key greenhouse gas methane (CH4) is increasingly highlighted as being important to mitigate climate change. Effective emission reductions require cost-effective ways to measure CH4 to detect sources and verify that mitigation efforts work. We present here a novel approach to measure methane at atmospheric concentrations by means of a low-cost electronic nose strategy where the readings of a few sensors are combined, leading to errors down to 33 ppb and coefficients of determination, R-2, up to 0.91 for in situ measurements. Data from methane, temperature, humidity, and atmospheric pressure sensors were used in customized machine learning models to account for environmental cross-effects and quantify methane in the ppm-ppb range both in indoor and outdoor conditions. The electronic nose strategy was confirmed to be versatile with improved accuracy when more reference data were supplied to the quantification model. Our results pave the way toward the use of networks of low-cost sensor systems for the monitoring of greenhouse gases.

  • 20.
    Domènech-Gil, Guillem
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Benefits of virtual sensors for air quality monitoring in humid conditions2021In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 344, article id 130294Article in journal (Refereed)
    Abstract [en]

    The gas sensing mechanisms, response, and behaviour of a real and a virtual solid-state chemical gas sensor operating either in static or in dynamic mode have been compared. The analysis was done by exposing simultaneously both sensors to different concentrations of various volatile organic compounds diluted in dry, as well as humid, synthetic air. The results revealed similar responses and behaviours for both types of measurement modes when the sensors were exposed towards single gas compounds, but a sensitivity enhancement in measurements comprising mixtures of gases when the sensors were operated in dynamic mode. The method used is able to overcome surface saturation problems and is beneficial for applications where mixtures of gases diluted in relative humidity are present.

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  • 21.
    Domènech-Gil, Guillem
    et al.
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Machine Learning for Enhanced Operation of Underperforming Sensors in Humid Conditions2023Conference paper (Other academic)
    Abstract [en]

    By using a single sensor as a virtual electronic nose, we demonstrate the possibility of obtaining good results with underperforming sensors that, at first glance, would be discarded. For this aim, we characterized chemical gas sensors with low repeatability and random drift towards both dangerous and innocuous volatile organic compounds (VOCs) under different levels of relative humidity. Our results show classification accuracies higher than 90% when differentiating harmful from harmless VOCs and coefficients of determination, R2, higher than 80% when determining their concentrationin the parts per billion to parts per million range.

  • 22.
    Domènech-Gil, Guillem
    et al.
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Machine Learning for Enhanced Operation of UnderperformingSensors in Humid Conditions2024Conference paper (Refereed)
    Abstract [en]

    Using a single sensor as a virtual electronic nose, we demonstrate the possibility of obtaininggood results with underperforming sensors that, at first glance, would be discarded. For this aim, wecharacterized chemical gas sensors with low repeatability and random drift towards both dangerousand innocuous volatile organic compounds (VOCs) under different levels of relative humidity. Ourresults show classification accuracies higher than 90% when differentiating harmful from harmlessVOCs and coefficients of determination, R2, higher than 80% when determining their concentrationin the parts per billion to parts per million range.

  • 23.
    Domènech-Gil, Guillem
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Rodner, Marius
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Temperature Cycled Operation and Multivariate Statistics for Electronic-Nose Applications Using Field Effect Transistors2020In: Proceedings of 4th International Conference nanoFIS 2020 - Functional Integrated nanoSystems, 2020, Vol. 56, p. 1-3Conference paper (Other academic)
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  • 24.
    Eriksson, Jens
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Borgfeldt, Christer
    Department of Obstetrics and Gynecology, Lund University, Sweden.
    Electronic Nose for Early Diagnosis of Ovarian Cancer2024Conference paper (Refereed)
    Abstract [en]

    We present an electronic nose that detects ovarian cancer based on gas emissions from blood plasma. There is currently no test available for screening or diagnostic testing of this disease, whichis therefore often detected at aa late stage, resulting in a poor prognosis. Our approach correctly detected 85 out of 87 ovarian cancers, ranging from borderline to stage IV.

  • 25.
    Eriksson, Jens
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Fashandi, Hossein
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Gas sensing with epitaxial graphene on silicon carbide: performance tuning for air quality control2014In: Proc. E-MRS 2014, Lille, France, May 26-30, 2014Conference paper (Refereed)
  • 26.
    Eriksson, Jens
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Hsuan Kang, Yu
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Adjusting the electronic properties and gas reactivity of epitaxial graphene by thin surface metallization2014In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 439, p. 105-108Article in journal (Refereed)
    Abstract [en]

    Graphene-based chemical gas sensors normally show ultra-high sensitivity to certain gas molecules but at the same time suffer from poor selectivity and slow response and recovery Limes. Several approaches based on functionalization or modification of the graphene surface have been demonstrated as means to improve these issues, but most such measures result in poor reproducibility. In this study we investigate reproducible graphene surface modifications by sputter deposition of thin nanostructured Au or Pt layers. It is demonstrated that under the right metallization conditions the electronic properties of the surface remain those of graphene, while the surface chemistry is modified to improve sensitivity, selectivity and speed of response to nitrogen dioxide.

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  • 27.
    Eriksson, Jens
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Strandqvist, Carl
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Graphensic AB Linköping, Sweden.
    Gunnarsson, Rickard
    Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.
    Ekeroth, Sebastian
    Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.
    Ivanov, Ivan Gueorguiev
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
    Helmersson, Ulf
    Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.
    Uvdal, Kajsa
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Surface Physics and Nano Science. Linköping University, Faculty of Science & Engineering.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering. Graphensic AB Linköping, Sweden.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Modified Epitaxial Graphene on SiC for Extremely Sensitive andSelective Gas Sensors2016In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 858, p. 1145-1148Article in journal (Refereed)
    Abstract [en]

    Two-dimensional materials offer a unique platform for sensing where extremely high sensitivity is a priority, since even minimal chemical interaction causes noticeable changes inelectrical conductivity, which can be used for the sensor readout. However, the sensitivity has to becomplemented with selectivity, and, for many applications, improved response- and recovery times are needed. This has been addressed, for example, by combining graphene (for sensitivity) with metal/oxides (for selectivity) nanoparticles (NP). On the other hand, functionalization or modification of the graphene often results in poor reproducibility. In this study, we investigate thegas sensing performance of epitaxial graphene on SiC (EG/SiC) decorated with nanostructured metallic layers as well as metal-oxide nanoparticles deposited using scalable thin-film depositiontechniques, like hollow-cathode pulsed plasma sputtering. Under the right modification conditions the electronic properties of the surface remain those of graphene, while the surface chemistry can betuned to improve sensitivity, selectivity and speed of response to several gases relevant for airquality monitoring and control, such as nitrogen dioxide, benzene, and formaldehyde.

  • 28.
    Eriksson, Jens
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Vasiliauskas, Remigijus
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
    Thickness uniformity and electron doping in epitaxial graphene on SiC2013In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 740-742, p. 153-156Article in journal (Refereed)
    Abstract [en]

    Large variations have been observed in the thickness uniformity and carrier concentration of epitaxial graphene grown on SiC by sublimation for samples grown under identical conditions and on nominally on-axis hexagonal SiC (0001) substrates. We have previously shown that these issues are both related to the morphology of the graphene-SiC surface after sublimation growth. Here we present a study on how the substrate polytype, substrate surface morphology and surface restructuring during sublimation growth affect the uniformity and carrier concentration in epitaxial graphene on SiC. These issues were investigated employing surface morphology mapping by atomic force microscopy coupled with local surface potential mapping using scanning Kelvin probe microscopy.

  • 29.
    Eriksson, Jens
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    SiC-2D-material-hybrids as a Platform for Extremely Sensitive and Selective Gas Sensors2016In: Proceedings EMRS 2016, 2016Conference paper (Refereed)
  • 30.
    Fraschetti, Elena
    et al.
    Sapienza University of Rome, Italy.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Domènech-Gil, Guillem
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Buzzin, Alessio
    Sapienza University of Rome, Italy.
    Mastrandrea, Antonio
    Sapienza University of Rome, Italy.
    Mazzetta, Ivan
    Sapienza University of Rome, Italy.
    de Cesare, Giampiero
    Sapienza University of Rome, Italy.
    Casalinuovo, Silvia
    Sapienza University of Rome, Italy.
    Quaranta, Simone
    Institute for the Study of Nanostructured Materials (CNR ISMN), Rome, Italy .
    Caputo, Domenico
    Sapienza University of Rome, Italy.
    Characterization of Disposable Facemasks for COVID-19 Through Colorimetric Analysis2022In: NanoInnovation 2021, Institute of Physics (IOP), 2022, Vol. 1265, article id 012008Conference paper (Refereed)
    Abstract [en]

    Many aspects of the world population's daily life have been recently changed by the events following the SARS-COV-2 pandemic outbreak. Among all the consequences, wearing face masks has become a common routine to protect from virus transmission risks. This work presents a simple colorimetric system able to detect the carbon dioxide (CO2) saturation inside a disposable face mask, which is useful to determine the level of wear and degradation and to visually provide indications on its disposal time. The experiments were carried out by wearing a FFP2 face mask externally treated with a phenolphthalein solution and including in its breathing zone a CO2 sensor. Changes in face mask color were recorded by a camera and analyzed with ImageJ. A strong correspondence was found between the high values of CO2 detected by the sensor and the analyzed data. The results are promising and suggest further efforts in developing easy-to-use colorimetric methods as a visual indicator of the life cycle of a disposable face mask.

  • 31. Hasegawa, Yuki
    et al.
    Ishida, R.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Development of ethylene gas sensor for evaluating fruit ripening2017Conference paper (Refereed)
  • 32.
    Hasegawa, Yuki
    et al.
    Saitama University, Saitama, Japan.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Development of Agriculture Support System Using Plant Bioelectric Potential Responses and Gas Sensor2017In: International Journal of Food and Biosystems Engineering, ISSN 2408-0675, Vol. 5, no 1, p. 44-51Article in journal (Refereed)
    Abstract [en]

    In this study,we focus on the plant bioelectric potential response as a low-cost and a high sensitivity evaluation technique of plant physiological activities for an agriculture support system. We developed a cultivation light intensity control system using bioelectric potential response. This system contributes to improvement of the cultivation environment and provides energy saving effect.In addition, we introduced a field effect transistor based on silicon carbide (SiC-FET)gas sensor and evaluated the characteristics of the sensor by changing several parameters. The results showed that iridium gated SiC-FET sensor has high sensitivity to ethylene,and the highest response is achieved at 200 ◦C. We aim at the development of an agriculture support system, which combines the plant bioelectrical potential and the SiC-FET gas sensor response.

  • 33.
    Iovino, Maria Rosa
    et al.
    Servizio Archeologico, Soprintendenza ai BB.CC.AA., Catania, Italy.
    Maniscalco, Laura
    Servizio Archeologico, Soprintendenza ai BB.CC.AA., Catania, Italy.
    Pappalardo, Giuseppe
    LANDIS, National Institute of Nuclear Physics (INFN)-LNS, Catania, Italy; University of Catania, Italy.
    Pappalardo, Lighea
    LANDIS, National Institute of Nuclear Physics (INFN)-LNS, Catania, Italy; IBAM-CNR, Catania, Italy.
    Puglisi, Donatella
    University of Catania, Italy.
    Rizzo, Francesca
    LANDIS, National Institute of Nuclear Physics (INFN)-LNS, Catania, Italy; University of Catania, Italy.
    Romano, Francesco Paolo
    LANDIS, National Institute of Nuclear Physics (INFN)-LNS, Catania, Italy; IBAM-CNR, Catania, Italy.
    Archaeological volcanic glass from the site of Rocchicella (Sicily, Italy)2008In: Archaeometry, ISSN 0003-813X, E-ISSN 1475-4754, Vol. 50, no 3, p. 474-494Article in journal (Refereed)
    Abstract [en]

    The site of Rocchicella, near Catania, in eastern Sicily, has yielded important archaeological evidence from prehistoric times to the Middle Ages. Extensive archaeological investigations of cultural layers dating from the Palaeo-Mesolithic to the Copper Age have recently been undertaken, and volcanic glass, mainly obsidian, has been collected in the course of excavation. To determine the provenance of this volcanic glass, a non-destructive elemental analysis was carried out to measure the concentration of characteristic trace elements. The analysis was carried out using a new XRF spectrometer equipped with a beam stability controller and a quantitative method developed at the LANDIS laboratory of the INFN–CNR Institutes of Catania. In addition to the obsidian, it was demonstrated for the first time that a local vitreous material similar to obsidian, but displaying a completely different composition, was used during all the investigated periods. This material was identified as a basaltic glass, characterized by a superficial product of devitrification called palagonite. Analysis of the obsidians has led to the identification of the island of Lipari as the provenance source. High- and low-power microscopic use-wear analysis on obsidian and basaltic glass artefacts indicated that soft wood and plant matter might have been processed at the site.

  • 34.
    Lloyd Spetz, Anita
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Sobocinski, Maciej
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Halonen, Niina
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Juuti, Jari
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Jantunen, Heli
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    LTCC, new packaging approach for toxic gas and particle detection2015In: Eurosensors 2015, Elsevier, 2015, Vol. 120, p. 484-487Conference paper (Refereed)
    Abstract [en]

    Packaging of chemical sensors is still an area, which is not much explored. Low temperature co-fired ceramic, LTCC, packaging offers large advantages in terms of 3D design, integration of advanced functionality and fast processing. SiC based FET gas sensors are possible to integrate directly in the LTCC co-firing process at 850 °C, whereby both high temperature and other advanced applications like ultra-low detection of toxic gases are greatly improved. The LTCC packaging is also used for development of particle detectors as well as packaging for an electrical method to detect toxic effect on cells by particles.

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  • 35.
    Prokupek, J.
    et al.
    Institute of Physics of the ASCR, Prague, Czech Republic.
    Margarone, DanieleInstitute of Physics of the ASCR, Prague, Czech Republic.Kramer, D.Institute of Physics of the ASCR, Prague, Czech Republic.Mocek, T.Institute of Physics of the ASCR, Prague, Czech Republic.Limpouch, J.Institute of Physics of the ASCR, Prague, Czech Republic.Kim, I. J.Advanced Photonics Research Institute, GIST, Gwangju, Republic of Korea.Jeong, T. M.Advanced Photonics Research Institute, GIST, Gwangju, Republic of Korea.Nam, K. H.Advanced Photonics Research Institute, GIST, Gwangju, Republic of Korea.Bertuccio, GiuseppePolitecnico di Milano, Como Campus, Italy.Puglisi, DonatellaPolitecnico di Milano, Como Campus, Italy.Korn, G.Institute of Physics of the ASCR, Prague, Czech Republic.
    Experimental test of TOF diagnostics for PW class lasers2013Conference proceedings (editor) (Refereed)
    Abstract [en]

    New particle acceleration regimes driven by PW class lasers imply the development of new in-situ diagnostics. Before constructing new types of detectors one must test currently available diagnostics in these new regimes ofhigh intensity laser-matter interaction. Experimental tests on two types of time of flight detectors are presented, demonstrating the possibility of their measuring capabilities in harsh conditions, namely the strong laser induced electromagnetic pulse. A recently developed silicon carbide detector was successfully tested and particle beams were characterized. Further tests were performed on a detector based on secondary emission of electrons during the transition of laser accelerated particle beams. The presented results show a clear consistency and sufficient capabilities for high intensity laser driven particle beam detection.

  • 36.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    VOC sensors for indoor air quality control2015Conference paper (Other academic)
  • 37.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering. Politecnico di Milano, Campus Como, Como, Italy.
    Bertuccio, Giuseppe
    Politecnico di Milano, Como Campus, Italy; Italian National Institute of Nuclear Physics (INFN), Section Milano, Milan, Italy.
    Silicon Carbide Microstrip Radiation Detectors2019In: Micromachines, E-ISSN 2072-666X, Vol. 10, no 12, article id 835Article in journal (Refereed)
    Abstract [en]

    Compared with the most commonly used silicon and germanium, which need to work at cryogenic or low temperatures to decrease their noise levels, wide-bandgap compound semiconductors such as silicon carbide allow the operation of radiation detectors at room temperature, with high performance, and without the use of any bulky and expensive cooling equipment. In this work, we investigated the electrical and spectroscopic performance of an innovative position-sensitive semiconductor radiation detector in epitaxial 4H-SiC. The full depletion of the epitaxial layer (124 µm, 5.2 × 1013 cm−3) was reached by biasing the detector up to 600 V. For comparison, two different microstrip detectors were fully characterized from −20 °C to +107 °C. The obtained results show that our prototype detector is suitable for high resolution X-ray spectroscopy with imaging capability in a wide range of operating temperatures.

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  • 38.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Bur, Christian
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. Saarland University, Lab for Measurement Technology, Germany.
    Bastuck, Manuel
    Saarland University, Lab for Measurement Technology, Germany.
    Schuetze, Andreas
    Saarland University, Germany.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Mastering VOC detection for better indoor air quality2014Conference paper (Refereed)
    Abstract [en]

    In this study, we use two different sensor technologies based on gas sensitive silicon carbide field effect transistors (SiC-FETs) and epitaxial graphene on SiC (EG/SiC) for highly sensitive and selective detection of trace amounts of three hazardous volatile organic compounds (VOCs), i.e. formaldehyde (CH2O), benzene (C6H6), and naphthalene (C10H8), present in indoor environments in concentrations of health concern.

    Iridium and platinum are used as sensing layers for the gate contacts. The FET sensors are operated at high temperature, under static and dynamic conditions. Excellent detection limits of 10 ppb for CH2O, about 1 ppb for C6H6, and below 0.5 ppb for C10H8 are measured at 60 % relative humidity (r.h.) [1]. The selectivity of the sensors is increased by temperature cycled operation and data evaluation based on multivariate statistics. Discrimination of CH2O, C6H6, and C10H8 independent of the level of background humidity is possible with a very high cross-validation rate up to 90 % [2]. These results are very encouraging for indoor air quality control, being below the threshold limits recommended by the WHO guidelines.

    Graphene-based chemical sensors offer the advantage of extreme sensitivity due to graphene’s unique electronic properties and the fact that every single atom is at the surface and available to interact with gas molecules. For this reason, uniform monolayer graphene is crucial [3], which is guaranteed by our optimized epitaxial growth process. Graphene-based chemical gas sensors normally show ultra-high sensitivity to certain gas molecules but suffer from poor selectivity. Functionalization or modification of the graphene surface can improve selectivity, but most such measures result in poor reproducibility. We demonstrate reproducible, non-destructive means of graphene surface decoration with nanostructured metals and metal oxides, and study their effect on the gas interactions at the graphene surface.

  • 39.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
    Bur, Christian
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. Saarland University, Saarbruecken, Germany.
    Kang, Yu Hsuan
    No University.
    Yakimova, Rositza
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Schütze, Andreas
    Saarland University, Saarbruecken, Germany.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    SiC-FET and graphene-based gas sensors for sensitive detection of toxic substances in indoor environments2014In: Proc of IMCS 2014, Buenos Aires, ARgentina, March 17-19, 2014Conference paper (Refereed)
  • 40.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Domènech-Gil, Guillem
    Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
    Enabling Lifelong Learning by Using Multiple Engagement Tools2023In: Proceedings of the 19th International CDIO Conference, 2023, p. 633-643Conference paper (Refereed)
    Abstract [en]

    This study aims to identify effective engagement tools and strategies that may strengthen student learning processes with a long-term impact. The context of learning plays an active role in student performance and needs to be carefully considered when designing collaborative learning environments. In the framework of a CDIO course entitled Project Course in Applied Physics (12 ECTS), master’s students in applied physics, electrical engineering, biomedical engineering, material science and nanotechnology work in groups of four to seven people for realizing their own project idea given three broad requirements: (i) use gas sensors, (ii) manage a certain maximum budget to purchase components, and (iii) build a working prototypefor any indoor air quality monitoring application of interest for them and their customer. Groupsare generally multicultural and multidisciplinary. Qualified supervision and skills training activities are adapted to facilitate the students’ progress and guarantee the success of their project work. Based on observations, feedback, and results over a five-year period, this approach appears more engaging and inspiring for both students and teachers compared to more defined projects. Encouraging the students to conceive their own original ideas, involving them in the co-creation of the learning process, and building knowledge, understanding, and skills through a variety of engaging experiences, helps their motivation, interest, active participation, and creativity with a direct impact on the quality of their learning. As an example of successful project work, here we report on two groups of students at Linköping University, Sweden, who have recently designed, developed, and tested an innovative sensor system prototype for smart monitoring of gas and particle emissions from cooking activities. The project course has received 5.0/5.0 as an overall students’ evaluation.

  • 41.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Huotari, Joni
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Bastuck, Manuel
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Lab for Measurement Technology, Saarland University, Saarbruecken, Germany.
    Bur, Christian
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Lab for Measurement Technology, Saarland University, Saarbruecken, Germany.
    Lappalainen, Jyrki
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Schuetze, Andreas
    Lab for Measurement Technology, Saarland University, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering. Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Exploring the gas sensing performance of catalytic metal/ metal oxide 4H-SiC field effect transistors2016In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 858, p. 997-1000Article in journal (Refereed)
    Abstract [en]

    Gas sensitive metal/metal-oxide field effect transistors based on silicon carbide were used to study the sensor response to benzene (C6H6) at the low parts per billion (ppb) concentration range. A combination of iridium and tungsten trioxide was used to develop the sensing layer. Highsensitivity to 10 ppb C6H6 was demonstrated during several repeated measurements at a constant temperature from 180 to 300 °C. The sensor performance was studied also as a function of the electrical operating point of the device, i.e., linear, onset of saturation, and saturation mode. Measurements performed in saturation mode gave a sensor response up to 52 % higher than those performed in linear mode.

  • 42.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, The Institute of Technology.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Bur, Christian
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. Saarland University, Lab for Measurement Technology, Germany.
    Schuetze, Andreas
    Saarland University, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Catalytic metal-gate field effect transistors based on SiC for indoor air quality control2015In: Journal of Sensors and Sensor Systems, ISSN 2194-8771, Vol. 4, p. 1-8Article in journal (Refereed)
    Abstract [en]

    High-temperature iridium-gated field effect transistors based on silicon carbide have been used for sensitive detection of specific volatile organic compounds (VOCs) in concentrations of health concern, for indoorair quality monitoring and control. Formaldehyde, naphthalene, and benzene were studied as hazardous VOCs at parts per billion (ppb) down to sub-ppb levels. The sensor performance and characteristics were investigated at a constant temperature of 330° C and at different levels of relative humidity up to 60 %, showing good stability and repeatability of the sensor response, and excellent detection limits in the sub-ppb range.

    Download full text (pdf)
    fulltext
  • 43.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Bur, Christian
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology. Saarland University, Saarbruecken, Germany.
    Schuetze, Andreas
    Saarland University, Saarbruecken, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
    Silicon carbide field effect transistors for detection of ultra-low concentrations of hazardous volatile organic compounds2014In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 778-780, p. 1067-1070Article in journal (Refereed)
    Abstract [en]

    Gas sensitive silicon carbide field effect transistors with nanostructured Ir gate layershave been used for the first time for sensitive detection of volatile organic compounds (VOCs) atpart per billion level, for indoor air quality applications. Formaldehyde, naphthalene, and benzenehave been used as typical VOCs in dry air and under 10% and 20% relative humidity. A singleVOC was used at a time to study long-term stability, repeatability, temperature dependence, effectof relative humidity, sensitivity, response and recovery times of the sensors.

  • 44.
    Puglisi, Donatella
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Huotari, Joni
    University of Oulu, Finland.
    Bastuk, Manuel
    Saarland University, Saarbruecken, Germany.
    Lloyd Spetz, Anita
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Andersson, Mike
    Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, Faculty of Science & Engineering.
    Exploring the gas sensing performance of catalytic metal/ metal oxide 4H-SiC field effect transistors2015In: ICSCRM 2015, 2015Conference paper (Refereed)
  • 45.
    Puglisi, Donatella
    et al.
    University of Catania, Italy.
    Foti, Gaetano
    University of Catania, Italy.
    Bertuccio, Giuseppe
    Politecnico di Milano, Como Campus, Italy.
    Diffusion Length in n-doped 4H Silicon Carbide Crystals Detected by Alpha Particle Probe2009In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 615-617, p. 857-860Article in journal (Refereed)
    Abstract [en]

    The achievement of nuclear detectors in silicon carbide imposes severe constraints onthe electronic quality and thickness of the material due to the relatively high value of the energyrequired to generate an electron-hole pair (7.8 eV) in this material compared to the value for Si (3.6 eV). In this work, 4H-SiC charged particle detectors were realised using epitaxial layers ofn-type doping as active region. The thickness of the epilayer is always below 80 μm with a netdoping concentration in the range of 8 x 1013 to 1016 cm-3. These properties allowed the fabricationof Schottky diodes that operate well as radiation detectors. At low doping concentration, theepilayer is totally depleted at quite low reverse bias (≈ 50 V), thereby obtaining the maximumactive volume.

  • 46.
    Rodner, Marius
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Helmersson, Ulf
    Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics. Linköping University, Faculty of Science & Engineering.
    Ivanov, Ivan Gueorguiev
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
    Uvdal, Kajsa
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Surface Physics and Nano Science. Linköping University, Faculty of Science & Engineering.
    Schuetze, Andreas
    Saarland University, Saarbrücken Germany.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Iron oxide nanoparticle decorated graphene for ultra-sensitive detection of volatile organic compounds2018In: Proceedings, ISSN 2504-3900, Vol. 2, no 13, article id 985Article in journal (Refereed)
    Abstract [en]

    It has been found that two-dimensional materials, such as graphene, can be used as remarkable gas detection platforms as even minimal chemical interactions can lead to distinct changes in electrical conductivity. In this work, epitaxially grown graphene was decorated with iron oxide nanoparticles for sensor performance tuning. This hybrid surface was used as a sensing layer to detect formaldehyde and benzene at concentrations of relevance in air quality monitoring (low parts per billion). Moreover, the time constants could be drastically reduced using a derivative sensor signal readout, allowing detection at the sampling rates desired for air quality monitoring applications.

    Download full text (pdf)
    fulltext
  • 47.
    Rodner, Marius
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering. Graphensic AB, Linköping, Sweden.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    A platform for extremely sensitive gas sensing: 2D materials on silicon carbide2018In: TechConnect Briefs 2018 - Advanced Materials, TechConnect, 2018, Vol. 2, p. 101-104Conference paper (Refereed)
    Abstract [en]

    2D materials offer a unique platform for sensing with extreme sensitivity, since minimal chemical interactions cause noticeable changes in the electronic state. An area where this is particularly interesting is environmental monitoring of gases that are hazardous at trace levels. In this study, SiC is used as a base for epitaxial growth of high quality, uniform graphene, and for templated growth of atomically thin layers of platinum, with potential benefits in terms of the ability to operate at higher temperature and to serve as a more robust template for fiinctionalization compared to graphene. Fiinctionalization with nanoparticles allows tuning the sensitivity to specific molecules without damaging the 2D sensor transducer. With this platform we demonstrate detection of nitrogen dioxide, formaldehyde, and benzene at trace concentrations. This, combined with smart sensor signal evaluation allowing fast response times, could allow real-time monitoring of these toxic pollutants at concentrations of relevance to air quality monitoring.

  • 48.
    Santangelo, Maria Francesca
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Shtepliuk, Ivan I.
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
    Puglisi, Donatella
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Yakimova, Rositsa
    Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
    Eriksson, Jens
    Linköping University, Department of Physics, Chemistry and Biology, Sensor and Actuator Systems. Linköping University, Faculty of Science & Engineering.
    Epitaxial graphene sensors combined with 3D printed microfluidic chip for heavy metals detection2018In: Proceedings, ISSN 2504-3900, Vol. 2, no 13, article id 982Article in journal (Refereed)
    Abstract [en]

    Two-dimensional materials may constitute key elements in the development of a sensing platform where extremely high sensitivity is required, since even minimal chemical interaction can generate appreciable changes in the electronic state of the material. In this work, we investigate the sensing performance of epitaxial graphene on Si-face 4H-SiC (EG/SiC) for liquid-phase detection of heavy metals (e.g., Pb). The integration of preparatory steps needed for sample conditioning is included in the sensing platform, exploiting fast prototyping using a 3D printer, which allows direct fabrication of a microfluidic chip incorporating all the features required to connect and execute the Lab-on-chip (LOC) functions. It is demonstrated that interaction of Pb2+ ions in water-based solutions with the EG enhances its conductivity exhibiting a Langmuir correlation between signal and Pb2+ concentration. Several concentrations of Pb2+ solutions ranging from 125 nM to 500 µM were analyzed showing good stability and reproducibility over time.

  • 49.
    Torrisi, Lorenzo
    et al.
    INFN-LNS Catania, Italy.
    Cavallaro, Salvatore
    INFN-LNS Catania, Italy.
    Cutroneo, Maria
    University of Messina, Italy.
    Cirrone, Pablo
    INFN-LNS Catania, Italy.
    Giuffrida, Lorenzo
    INFN-LNS Catania, Italy.
    Andò, L.
    INFN-LNS Catania, Italy.
    Calcagno, Lucia
    University of Catania, Italy.
    Musumeci, Paolo
    University of Catania, Italy.
    Visco, A.
    Dipartimento di Chimica Industriale, Italy.
    Milone, C.
    Dipartimento di Chimica Industriale, Italy.
    Bertuccio, Giuseppe
    Politecnico di Milano, Como Campus, and INFN, Italy.
    Puglisi, Donatella
    Politecnico di Milano, Como Campus, and INFN, Italy.
    Verona, Claudio
    University of Rome "Tor Vergata", Italy.
    Margarone, Daniele
    Institute of Physics, ASCR, Prague, Czech Republic.
    Krasa, J.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Velyhan, A.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Krouski, E.
    PALS Laboratory, Prague, Czech Republic.
    Pfeifer, M.
    PALS Laboratory, Prague, Czech Republic.
    Laska, L.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Skala, J.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Ullschmied, U.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Wolowski, J.
    Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland.
    Badziak, J.
    Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland.
    Ryc, L.
    Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland.
    Rosinsky, M.
    Institute of Plasma Physics and Laser Microfusion, Warsaw, Poland.
    Szydlowski, A.
    Soltan Institute for Nuclear Studies, Warsaw, Poland.
    High intensity laser-generating plasmas in forward direction in thin films and Thomson parabola spectrometer monitorage2010Report (Other academic)
    Abstract [en]

    Asterix laser at PALS Laboratory of Prague, operating at 1315 nm fundamental wavelength, 300 ps pulse duration, 1016 W/cm2 intensity and single pulse mode, was employed to irradiate thin hydrogenated targets placed in high vacuum. Non-equilibrium plasmas were obtained in forward direction, i.e. along the normal to the target surface on the rear of the irradiated thin films. Plasmas were monitored with different ion detectors, placed around the direction normal to the target. The main detector was a Thomson parabola spectrometer aligned along the normal in forward direction. This spectrometer permits to provide many plasma parameters concerning the involved ions (energy, charge state, mass,...) obtained in a single laser shot. The spectrometer images, obtained by using a MCP coupled to a fast CCD camera, can be processed by a comparison with the simulation data obtained by a proper software. High ion energies and charge states have been obtained as a function of the laser parameters, target thickness and composition and irradiation conditions.

  • 50.
    Torrisi, Lorenzo
    et al.
    University of Messina, Italy.
    Cutroneo, Maria
    INFN - Laboratori Nazionali del Sud, Catania, Italy.
    Cavallaro, Salvatore
    INFN - Laboratori Nazionali del Sud, Catania, Italy.
    Giuffirda, Lorenzo
    INFN - Laboratori Nazionali del Sud, Catania, Italy.
    Andò, L.
    INFN - Laboratori Nazionali del Sud, Catania, Italy.
    Cirrone, Pablo
    INFN - Laboratori Nazionali del Sud, Catania, Italy.
    Bertuccio, Giuseppe
    Politecnico di Milano, Como Campus, Italy.
    Puglisi, Donatella
    Politecnico di Milano, Como Campus, Italy.
    Calcagno, Lucia
    University of Catania, Italy.
    Verona, Claudio
    University of Rome "Tor Vergata", Italy.
    Picciotto, A.
    Fondazione Bruno Kessler–IRST, Povo, Trento, Italy.
    Krasa, J.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Margarone, Daniele
    Institute of Physics, ASCR, Prague, Czech Republic.
    Velyhan, A.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Laska, L.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Krousky, E.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Pfeiffer, M.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Skala, J.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Ullschmied, J.
    Institute of Physics, ASCR, Prague, Czech Republic.
    Wolowski, J.
    Institute of Plasma Physics and Laser Microfusion, IPPLM, Waesaw, Poland.
    Badziak, J.
    Institute of Plasma Physics and Laser Microfusion, IPPLM, Waesaw, Poland.
    Rosinski, M.
    Institute of Plasma Physics and Laser Microfusion, IPPLM, Waesaw, Poland.
    Ryc, L.
    Institute of Plasma Physics and Laser Microfusion, IPPLM, Waesaw, Poland.
    Szydlowski, A.
    Institute of Plasma Physics and Laser Microfusion, IPPLM, Waesaw, Poland.
    Proton driven acceleration by intense laser pulses irradiating thin hydrogenated targets2013In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 272, p. 2-5Article in journal (Refereed)
    Abstract [en]

    The Asterix iodine laser of the PALS laboratory in Prague, operating at 1315 nm fundamental frequency, 300 ps pulse duration, 600 J maximum pulse energy and 1016 W/cm2 intensity, is employed to irradiatethin hydrogenated targets placed in high vacuum. Different metallic and polymeric targets allow togenerate multi-energetic and multi-specie ion beams showing peculiar properties. The plasma obtainedby the laser irradiation is monitored, in terms of properties of the emitted charge particles, by using time-of-flight techniques and Thomson parabola spectrometer (TPS). A particular attention is given tothe proton beam production in terms of the maximum energy, emission yield and angular distributionas a function of the laser energy, focal position (FP), target thickness and composition.

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