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Sundgren, Hans
Publications (10 of 15) Show all publications
Eriksson, M., Lindgren, D., Bjorklund, R., Winquist, F., Sundgren, H. & Lundström, I. (2011). Drinking water monitoring with voltammetric sensors. Paper presented at Eurosensors XXV, September 4-7, 2011, Athens, Greece. Procedia Engineering, 25, 1165-1168
Open this publication in new window or tab >>Drinking water monitoring with voltammetric sensors
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2011 (English)In: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 25, p. 1165-1168Article in journal (Refereed) Published
Abstract [en]

Pulsed voltammetry has been applied to drinking water monitoring. This non-selective technique facilitates detection of several different threats to the drinking water. A multivariate algorithm shows that anomaly detection is possible with a minimum of false alarms. Multivariate analysis can also be used to classify different types of substances added to the drinking water. Low concentrations of sewage water contaminating the drinking water can be detected. A network of such sensors is envisaged to facilitate real-time and on-line monitoring of drinking water distribution networks.

Place, publisher, year, edition, pages
Elsevier, 2011
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:liu:diva-118323 (URN)10.1016/j.proeng.2011.12.287 (DOI)
Conference
Eurosensors XXV, September 4-7, 2011, Athens, Greece
Available from: 2015-05-27 Created: 2015-05-27 Last updated: 2017-12-04
Eriksson, M., Winquist, F., Bjorklund, R., Lindgren, D., Sundgren, H. & Lundström, I. (2009). Event Detection in Crisis Management Systems. Paper presented at Proceedings of the Eurosensors XXIII Conference. Procedia Chemistry, 1(1), 1055-1058
Open this publication in new window or tab >>Event Detection in Crisis Management Systems
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2009 (English)In: Procedia Chemistry, ISSN 1876-6196, E-ISSN 1876-6196, Vol. 1, no 1, p. 1055-1058Article in journal (Refereed) Published
Abstract [en]

The EVENT project concerns drinking water surveillance and includes sensors and algorithms that detect anomalies in the drinking water properties, communication of the evaluated sensor data to a crises management system and presentation of information that is relevant for the end users of the crises management system. We have chosen to focus on a sensor technique based on an "electronic tongue", since this robust type of non-selective sensor, can detect a plurality of anomalies without the need of a specific sensor for each type of event. Measurements of natural variations and contamination events are presented and discussed.

Place, publisher, year, edition, pages
Elsevier, 2009
Keywords
Electronic tongue, Voltammetry, Drinking water, Surveillance, Crises management, Critical infrastructure
National Category
Control Engineering
Identifiers
urn:nbn:se:liu:diva-58421 (URN)10.1016/j.proche.2009.07.263 (DOI)000275995600040 ()
Conference
Proceedings of the Eurosensors XXIII Conference
Available from: 2010-08-12 Created: 2010-08-11 Last updated: 2017-12-12
Ulrich, C., Petersson, H., Sundgren, H., Björefors, F. & Krantz-Rülcker, C. (2007). Simultaneous estimation of soot and diesel contamination in engine oil using electrochemical impedance spectroscopy. Sensors and actuators. B, Chemical, 127(2), 613-618
Open this publication in new window or tab >>Simultaneous estimation of soot and diesel contamination in engine oil using electrochemical impedance spectroscopy
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2007 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 127, no 2, p. 613-618Article in journal (Refereed) Published
Abstract [en]

In this paper, we explore the combination of electrochemical impedance spectroscopy and multivariate data analysis to simultaneously predict the concentrations of soot and diesel in engine oil. For this purpose, we use a well defined measurement set-up to minimize interference from ambient noise, and to obtain a large amount of data in a short period of time. An imperative requirement is that soot and diesel affect the impedance in different ways over the employed frequency range. It was, for example, found that diesel had a larger influence at lower frequencies. Using partial least squares modelling we show that it is possible to simultaneously predict the concentrations of both soot and diesel in engine oil. Since the temperature in an engine varies, the influence of the oil temperature is investigated in a preliminary experiment. This study is a part of the development of an electrochemical on-board sensor for real-time monitoring of engine oil.

Keywords
Electrochemical impedance spectroscopy, Multivariate data analysis, Engine oil; Diesel, Soot
National Category
Inorganic Chemistry
Identifiers
urn:nbn:se:liu:diva-14886 (URN)10.1016/j.snb.2007.05.014 (DOI)
Available from: 2008-09-29 Created: 2008-09-29 Last updated: 2017-12-13
Lundström, I., Sundgren, H., Winquist, F., Eriksson, M., Krantz-Rülcker, T. & Lloyd-Spets, A. (2007). Twenty-five years of field effect gas sensor research in Linköping. Sensors and actuators. B, Chemical, 121(1), 247-262
Open this publication in new window or tab >>Twenty-five years of field effect gas sensor research in Linköping
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2007 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 121, no 1, p. 247-262Article in journal (Refereed) Published
Abstract [en]

The present contribution contains an overview of the development of gas sensitive field-effect devices in Linköping during the last 25 years. It is completely centred to the work at the Laboratory of Applied Physics at Linköping University, and is therefore not a proper review of a research field where many important contributions have been made by several other research groups. © 2006 Elsevier B.V. All rights reserved.

National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-37502 (URN)10.1016/j.snb.2006.09.046 (DOI)36430 (Local ID)36430 (Archive number)36430 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13
Lloyd-Spets, A., Sundgren, H., Thunér, B., Wingbrant, H., Belov, I., Svenningstorp, H. & Leisner, P. (2006). CFD analysis of packaging and mounting solutions for SiC-based gas sensors in automotive applications. , 4(1), 29-37
Open this publication in new window or tab >>CFD analysis of packaging and mounting solutions for SiC-based gas sensors in automotive applications
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2006 (English)Article in journal (Refereed) Published
Abstract [en]

Simulation-based guidelines were developed for designing tube-mounted gas sensors in the exhaust pipes of diesel and petrol engines, taking into account thermal constraints and gas flow conditions. Different block and tube mounting alternatives for SiC-based gas sensors were studied by means of temperature measurements and simulation of steady state heat transfer and gas flow. Design variables included the number of fins in the heat sink mounted on the inlet tube, the inlet construction, the mounting tube orientation, and the micro-heater substrate placement inside the mounting tube. The most preferable tube mounting design was determined with respect to the thermal performance of the sensor structure and with respect to the gas flow parameters, which are important for the sensor's selectivity, sensitivity and response time. Copyright © 2006 American Scientific Publishers All rights reserved.

National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-35726 (URN)10.1166/sl.2006.002 (DOI)28320 (Local ID)28320 (Archive number)28320 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-01-09
Briand, D., Wingbrant, H., Sundgren, H., Van, d. S., Ekedahl, L.-G., Lundström, I. & De, R. N. .. (2003). Modulated operating temperature for MOSFET gas sensors: Hydrogen recovery time reduction and gas discrimination. Sensors and actuators. B, Chemical, 93(1-3)
Open this publication in new window or tab >>Modulated operating temperature for MOSFET gas sensors: Hydrogen recovery time reduction and gas discrimination
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2003 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 93, no 1-3, p. 276-285Conference paper, Published paper (Other academic)
Abstract [en]

This communication presents a modulated mode of operation for MOSFET gas sensors. A low-power micromachined device allows pulsing the temperature of MOSFET gas sensors with a time constant less than 100ms. Modulating the temperature during the gas exposure modifies the kinetics of the gas reactions with the sensing film. The way the sensor response is modified by the temperature modulation depends on the sensor "history", on the nature of the surrounding gaseous atmosphere, and on the type of materials used as catalytic sensing film. Pulsing the temperature up just after the gas exposure can reduce the recovery time for specific applications, such as for hydrogen detection. Cycling the temperature can allow the discrimination between different gas mixtures. Discrimination was shown for gaseous mixtures of hydrogen and ammonia in air. The results obtained indicate that a "smart" combination of sample and temperature profile could be used to expand the information content in the sensor response. © 2003 Elsevier Science B.V. All rights reserved.

Keywords
Gas sensor, Low-power, MOSFET, Temperature modulation
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-46546 (URN)10.1016/S0925-4005(03)00230-2 (DOI)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
Briand, D., Sundgren, H., Van, D. S., Lundström, I. & De, R. N. .. (2001). Thermally isolated MOSFET for gas sending application. IEEE Electron Device Letters, 22(1), 11-13
Open this publication in new window or tab >>Thermally isolated MOSFET for gas sending application
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2001 (English)In: IEEE Electron Device Letters, ISSN 0741-3106, E-ISSN 1558-0563, Vol. 22, no 1, p. 11-13Article in journal (Refereed) Published
Abstract [en]

This work reports on thermally isolated electronic components for gas sensing applications. The device is composed of an array of 4 MOSFET, a diode and a semiconductor resistor integrated on a micro-hotplate, which is fabricated using bulk micromachining of silicon. The thermal efficiency of the device is 2°C/mW with a thermal constant less than 100 ms. Holes are made in the passivation film over the gates of the MOSFET and gas sensitive films deposited on top of the gate insulator. The low thermal mass device realized allows new modes of operation for MOSFET gas sensors such as a combination of the field and thermal effects and a pulsed temperature mode of operation.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-47493 (URN)10.1109/55.892428 (DOI)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
Briand, D., Van, D. S., De, R. N. .., Sundgren, H. & Lundström, I. (2000). Low-power micromachined MOSFET gas sensor. Journal of microelectromechanical systems, 9(3), 303-308
Open this publication in new window or tab >>Low-power micromachined MOSFET gas sensor
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2000 (English)In: Journal of microelectromechanical systems, ISSN 1057-7157, E-ISSN 1941-0158, Vol. 9, no 3, p. 303-308Article in journal (Refereed) Published
Abstract [en]

This paper reports on the design, fabrication, and characterization of the first low-power consumption MOSFET gas sensor. The novel MOSFET array gas sensor has been fabricated using anisotropic bulk silicon micromachining. A heating resistor, a diode used as temperature sensor, and four MOSFETs are located in a silicon island suspended by a dielectric membrane. The membrane has a low thermal conductivity coefficient and, therefore, thermally isolates the electronic components from the chip frame. This low thermal mass device allows the reduction of the power consumption to a value of 90 mW for an array of four MOSFETs at an operating temperature of 170 °C. Three of the MOSFETs have their gate covered with thin catalytic metals and are used as gas sensors. The fourth one has a standard gate covered with nitride and could act as a reference. The sensor was tested under different gaseous atmospheres and has shown good gas sensitivities to hydrogen and ammonia. The low-power MOSFET array gas sensor presented is suitable for applications in portable gas sensor instruments, electronic noses, and automobiles.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-47591 (URN)10.1109/84.870055 (DOI)
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13
Zubkans, J., Lloyd Spetz, A., Sundgren, H., Winquist, F., Kleperis, J., Lusis, A. & Lundström, I. (1995). In-situ modification of the NOx sensitivity of thin discontinuous platinum films as gates of chemical sensors. Thin Solid Films, 268(1-2), 140-143
Open this publication in new window or tab >>In-situ modification of the NOx sensitivity of thin discontinuous platinum films as gates of chemical sensors
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1995 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 268, no 1-2, p. 140-143Article in journal (Refereed) Published
Abstract [en]

It is shown how chemically sensitive metal-oxide semiconductor field-effect transistors with a thin discontinuous platinum gate can be modified for the detection of NOx. After a pulse of ammonia the sensors show an increased sensitivity to NOx. The threshold voltage shift induced by NOx is opposite to the direction before the ammonia pulse. The threshold voltage now increases due to NOx exposure, while hydrogen, ammonia and hydrocarbons cause a decrease of the threshold voltage. The temperature dependence of the NOx sensitivity suggests that after the ammonia pulse there are two competing polarisation phenomena caused by the interaction between NOx and the sensing surface. The results are of general interest since they indicate how thin sensing layers can be modified after fabrication to promote sensitivity towards specific molecules. Furthermore they shed some new light on the detection mechanisms of thin discontinuous metal gates.

Place, publisher, year, edition, pages
Elsevier, 1995
Keywords
metal-oxide semiconductor structure; nitric oxide; platinum; sensors
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-88143 (URN)10.1016/0040-6090(95)06863-5 (DOI)A1995TL76500023 ()
Available from: 2013-02-04 Created: 2013-01-30 Last updated: 2017-12-06
Lundström, I., Spetz, A., Sundgren, H. & Winquist, F. (1995). Microanalysis Systems for Gases. In: Micro Total Analysis Systems, 1994. Paper presented at 1st Workshop on Micro Total Analysis Systems, 21-22 November 1994, Enschede, Netherlands (pp. 153-163). Kluwer Academic Publishers
Open this publication in new window or tab >>Microanalysis Systems for Gases
1995 (English)In: Micro Total Analysis Systems, 1994, Kluwer Academic Publishers, 1995, p. 153-163Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Kluwer Academic Publishers, 1995
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-88148 (URN)A1995BC82K00015 ()0-7923-3217-2 (ISBN)
Conference
1st Workshop on Micro Total Analysis Systems, 21-22 November 1994, Enschede, Netherlands
Available from: 2013-02-04 Created: 2013-01-30 Last updated: 2014-01-09
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