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Resistance Sensor Based on Thermophoresis for Soot in Diesel Exhaust

Published online by Cambridge University Press:  01 February 2011

Robert Bjorklund ,
Mats L. Johansson ,
Ann Grant ,
Peter Jozsa ,
Per-Erik Fägerman ,
Jaska Paaso ,
Andreas Larsson ,
Doina Lutic  and
Anita Lloyd Spetz
Robert Bjorklund
Affiliation:
robbj@ifm.liu.se, Linköping University, Linköping, Sweden
Mats L. Johansson
Affiliation:
mjoha197@volvocars.com, Volvo Car Corp., Göteborg, Sweden
Ann Grant
Affiliation:
ann.w.grant@volvo.com, Volvo Technology Corp., Göteborg, Sweden
Peter Jozsa
Affiliation:
peter.jozsa@volvo.com, Volvo Technology Corp., göteborg, Sweden
Per-Erik Fägerman
Affiliation:
per-erik@mandalon.se, Mandalon Technologies AB, Linköping, Sweden
Jaska Paaso
Affiliation:
jaska.paaso@selmic.com, Selmic OY, Oulu, Finland
Andreas Larsson
Affiliation:
andreas.larsson@sintef.no, Sintef ICT, Blindern, Norway
Doina Lutic
Affiliation:
doilub@yahoo.com, Iasi University, Iasi, Romania
Anita Lloyd Spetz
Affiliation:
spetz@ifm.liu.se, Linköping University, Linköping, Sweden
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Abstract

A resistance sensor for use in diesel exhaust is reported. Several soot deposition mechanisms contribute to collection on the sensing electrodes. The sensor is designed to enhance the temperature difference between the electrode surface and the ambient. The resulting thermophoretic force on nanoparticles enhances soot deposition. Exhaust soot concentrations were shown to correlate with resistance decreases and the effect of thermophoresis was studied.

Keywords

sensorsemiconductingthermal conductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1253: Symposium K – Functional Materials and Nanostructures for Chemical and Bochemical Sensing , 2010 , 1253-K14-03
Copyright
Copyright © Materials Research Society 2010

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