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  • 1.
    Darmastuti, Zhafira
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Bur, Christian
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Rahlin, R.
    Alstom Power AB, Sweden .
    Lindqvist, Niclas
    Alstom Power AB, Sweden .
    Andersson, Mike
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Schuetze, A.
    University of Saarland, Germany .
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    SiC-FET based SO2 sensor for power plant emission applications2014Inngår i: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 194, s. 511-520Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Thermal power plants produce SO2 during combustion of fuel containing sulfur. One way to decrease the SO2 emission from power plants is to introduce a sensor as part of the control system of the desulphurization unit. In this study, SiC-FET sensors were studied as one alternative sensor to replace the expensive FTIR (Fourier Transform Infrared) instrument or the inconvenient wet chemical methods. The gas response for the SiC-FET sensors comes from the interaction between the test gas and the catalytic gate metal, which changes the electrical characteristics of the devices. The performance of the sensors depends on the ability of the test gas to be adsorbed, decomposed, and desorbed at the sensor surface. The feature of SO2, that it is difficult to desorb from the catalyst surface, makes it known as catalyst poison. It is difficult to quantify the SO2 with static operation, even at the optimum operation temperature of the sensor due to low response levels and saturation already at low concentration of SO2. The challenge of SO2 desorption can be reduced by introducing dynamic operation in a designed temperature cycle operation (TCO). The intermittent exposure to high temperature can help to desorb SO2. Simultaneously, additional features extracted from the sensor data can be used to reduce the influence of sensor drift. The TCO operation, together with pattern recognition, may also reduce the baseline and response variation due to changing concentration of background gases (4-10% O-2 and 0-70% RH), and thus it may improve the overall sensor performance. In addition to the laboratory experiment, testing in the desulphurization pilot unit was performed. Desulphurization pilot unit has less controlled environment compared to the laboratory conditions. Therefore, the risk of influence from the changing concentration of background gas is higher. In this study, linear discriminant analysis (LDA) and partial least square (PLS) were employed as pattern recognition methods. It was demonstrated that using LDA quantification of SO2 into several groups of concentrations up to 2000 ppm was possible. Additionally, PLS analysis indicated a good agreement between the predicted value from the model and the SO2 concentration from the reference instrument of the pilot plant.

  • 2.
    Datta, Timir
    et al.
    Maryland University, Baltimore, USA.
    Halonen, Niina
    University of Oulu, Finland.
    Hassinen, Antti
    University of Oulu, Finland.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Kellokumpu, Sakari
    University of Oulu, Finland.
    Abshire, Pamela
    University of Maryland, Baltimore, USA.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Smela, Elisabeth
    University of Maryland, Baltimore, USA.
    Integration of CMOS Chips into LOCs for Cell-Based Sensing2014Inngår i: Proceedings of Biosensors 2014, Australia, 2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Incorporating complementary metal oxide semiconductor (CMOS) chips that can perform signal processing, control, information readout, and direct sensing into microfluidic systems adds powerful capabilities to lab on a chip (LOC) devices. For example, on-chip sensors allow system miniaturization, amplifiers placed directly under the sensors provide high signal to noise ratios (SNRs), and signal processing circuitry reduces the amount of data that must be communicated off-chip. Packaging such chips to expose the sensors on the surface to a fluid environment while protecting the input/output region at the periphery has been challenging, however. We present a new packaging method based on forming an epoxy handle wafer around the chip, photolithographic patterning of metal and polymer films for interconnection and passivation, and bonding to PDMS microfluidics. Such packaged chips last for months in the incubator and can be sterilized and re-used. We will show two examples of cell-based sensing with these systems using chips produced in a commercially-available CMOS technology: monitoring the cytotoxicity of nanomaterials through capacitance changes and recording action potentials from electrogenic cells. Adherent cells normally spread out on surfaces, while stressed cells contract and apoptosis leads to detachment. A chip was produced consisting of an array of fully differential capacitance sensors and readout circuitry. Cells (kidney, Cercopithecus aethiops) were cultured on the chip surface to confluence and then exposed to cytotoxic TiO2 nanowires. Cell viability was evaluated with both the chip and a commercial cytotoxicity kit. Preliminary results indicate that viability can be monitored by capacitance measurements. In the second example, a cluster of cardiomyocytes was cultured on the surface of a different chip having an array of electrodes connected to on-chip amplifiers. Electrical recordings showed strong action potentials from the cluster, corresponding in time with the beating of the clump. The signal amplitude decreased with distance to the electrodes, as expected

  • 3.
    Halonen, Niina
    et al.
    University of Oulu, Finland.
    Datta-Chaudhuri, Timir
    University of Maryland, Baltimore, USA.
    Hassinen, Antti
    University of Oulu, Finland.
    Prakash, S. B.
    University of Maryland, Baltimore, USA.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Abshire, Pamela
    University of Maryland, Baltimore, USA.
    Smela, Elisabeth
    University of Maryland, Baltimore, USA.
    Kellokumpu, Sakari
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Cell clinic; CMOS chip measuring capacitance as indication of cell adhesion applied in evaluating the cytotoxicity of nanomaterials2014Inngår i: Proc. Eurosensors 2014, Brescia, Italy, September 7-10, 2014Konferansepaper (Fagfellevurdert)
  • 4.
    Halonen, Niina
    et al.
    University of Oulu, Finland.
    Datta-Chaudhuri, Timir
    University of Maryland, Baltimore, USA.
    Hassinen, Antti
    University of Oulu, Finland.
    Prakash, S. B.
    University of Maryland, Baltimore, USA.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    Abshire, Pamela
    University of Maryland, Baltimore, USA.
    Smela, Elisabeth
    University of Maryland, Baltimore, USA.
    Kellokumpu, Sakari
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska högskolan.
    CMOS-Based capacitance measurements applied in evaluating cell viability and cytotoxicity of nanomaterials2014Inngår i: Proc. E-MRS 2014, Lille, France May 26-30, 2014Konferansepaper (Fagfellevurdert)
  • 5.
    Halonen, Niina
    et al.
    University of Oulu, Finland.
    Kilpijärvi, Joni
    University of Oulu, Finland.
    Sobocinski, Maciej
    University of Oulu, Finland.
    Datta-Chaudhuri, Timir
    University of Maryland, Baltimore, USA.
    Hassinen, Antti
    University of Oulu, Finland.
    Prakash, S. B.
    University of Maryland, Baltimore, USA.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Abshire, Pamela
    University of Maryland, Baltimore, USA.
    Smela, Elisabeth
    University of Maryland, Baltimore, USA.
    Kellokumpu, Sakari
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Low temperature co-fired ceramic package for lab-on-a­chip applied in cell viability monitoring2015Inngår i: Proceedings Eurosensors 2015, 2015, s. 1187-1190Konferansepaper (Fagfellevurdert)
  • 6.
    Halonen, Niina
    et al.
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Kilpijärvi, Joni
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Sobocinski, Maciej
    Microelectronics and Material Physics Laboratories, University of Oulu, Finland.
    Datta-Chaudhuri, Timir
    Laboratory for MicroTechnologies, Department of Mechanical Engineering and the Institute for Systems Research ,University of Maryland, Baltimore, USA.
    Hassinen, Antti
    Division of Cell Biology, Department of Biochemistry, University of Oulu, Finland.
    Prakash, S. B.
    Integrated Biomorphic Information System Laboratory, University of Maryland, Baltimore, USA.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Abshire, Pamela
    Integrated Biomorphic Information System Laboratory, University of Maryland, Baltimore, USA.
    Smela, Elisabeth
    Laboratory for MicroTechnologies, Department of Mechanical Engineering and the Institute for Systems Research, University of Maryland, Baltimore, USA.
    Kellokumpu, Sakari
    Division of Cell Biology, Department of Biochemistry, University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten. Univ Oulu, Oulu, Finland.
    Low temperature co-fired ceramic package for lab-on-CMOS applied in cell viability monitoring2015Inngår i: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 120, s. 1079-1082Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Lab-on-CMOS chips (LOCMOS) are sophisticated miniaturized analysis tools based on integrated circuit (IC) microchips performing various laboratory functions. We have developed a low temperature co-fired ceramic (LTCC) package for a LOCMOS application regarding cytotoxicity assessment of nanomaterials. The LTCC packaged capacitance sensor chip is designed for long-term cell viability monitoring during nanoparticle exposure. The introduced LTCC package utilizes the flip chip bonding technique, and it is biocompatible as well as able to withstand the environmental conditions required to maintain mammalian cell culture directly on the surface of a complementary metal oxide semiconductor (CMOS) integrated circuit.

  • 7.
    Kilpijärvi, Joni
    et al.
    University of Oulu, Finland.
    Sobocinski, Maciej
    University of Oulu, Finland.
    Halonen, Niina
    University of Oulu, Finland.
    Hassinen, Antti
    University of Oulu, Finland.
    Prakash, Someshekar Bangalore
    University of Maryland, Baltimore, USA.
    Möller, Peter
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Abshire, Pamela
    University of Maryland, Baltimore, USA.
    Smela, Elisabeth
    University of Maryland, Baltimore, USA.
    Kellokumpu, Sakari
    University of Oulu, Finland.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    LTCC packaging for lab-on-CMOS applied in cell viability monitoring2016Inngår i: Proceedings EMRS 2016, 2016Konferansepaper (Fagfellevurdert)
  • 8.
    Möller, Peter
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Andersson, Mike
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Lloyd Spetz, Anita
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    Puustinen, Jarkko
    University of Oulu.
    Lappalainen, Jyrki
    University of Oulu, Finland.
    Eriksson, Jens
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad sensorvetenskap. Linköpings universitet, Tekniska fakulteten.
    NOx sensing with SiC field effect transistors2015Konferansepaper (Fagfellevurdert)
1 - 8 of 8
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