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A Potential Soot Mass Determination Method from Resistivity Measurement of Thermophoretically Deposited Soot

Malik, Azhar LU ; Abdulhamid, Hussam LU ; Pagels, Joakim LU ; Rissler, Jenny LU ; Lindskog, Magnus LU ; Nilsson, Patrik LU ; Bjorklund, R.; Jozsa, P.; Visser, J. and Spetz, A., et al. (2011) In Aerosol Science and Technology 45(2). p.284-294
Abstract
Miniaturized detection systems for nanometer-sized airborne particles are in demand, for example in applications for onboard diagnostics downstream particulate filters in modern diesel engines. A soot sensor based on resistivity measurements was developed and characterized. This involved generation of soot particles using a quenched co-flow diffusion flame; depositing the particles onto a sensor substrate using thermophoresis and particle detection using a finger electrode structure, patterned on thermally oxidized silicon substrate. The generated soot particles were characterized using techniques including Scanning Mobility Particle Sizer for mobility size distributions, Differential Mobility Analyzer-Aerosol Particle Mass analyzer for... (More)
Miniaturized detection systems for nanometer-sized airborne particles are in demand, for example in applications for onboard diagnostics downstream particulate filters in modern diesel engines. A soot sensor based on resistivity measurements was developed and characterized. This involved generation of soot particles using a quenched co-flow diffusion flame; depositing the particles onto a sensor substrate using thermophoresis and particle detection using a finger electrode structure, patterned on thermally oxidized silicon substrate. The generated soot particles were characterized using techniques including Scanning Mobility Particle Sizer for mobility size distributions, Differential Mobility Analyzer-Aerosol Particle Mass analyzer for the mass-mobility relationship, and Transmission Electron Microscopy for morphology. The generated particles were similar to particles from diesel engines in concentration, mobility size distribution, and mass fractal dimension. The primary particle size, effective density and organic mass fraction were slightly lower than values reported for diesel engines. The response measured with the sensors was largely dependent on particle mass concentration, but increased with increasing soot aggregate mobility size. Detection down to cumulative mass as small as 20-30 mu g has been demonstrated. The detection limit can be improved by using a more sensitive resistance meter, modified deposition cell, larger flow rates of soot aerosol and modifying the sensor surface. (Less)
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publication status
published
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in
Aerosol Science and Technology
volume
45
issue
2
pages
284 - 294
publisher
Taylor & Francis
external identifiers
  • wos:000285543700012
  • scopus:79953726770
ISSN
1521-7388
DOI
10.1080/02786826.2010.533214
language
English
LU publication?
yes
id
b696784a-a8df-4798-9992-a29b3c66aed0 (old id 1791174)
date added to LUP
2011-03-16 14:28:39
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2017-09-10 03:14:41
@article{b696784a-a8df-4798-9992-a29b3c66aed0,
  abstract     = {Miniaturized detection systems for nanometer-sized airborne particles are in demand, for example in applications for onboard diagnostics downstream particulate filters in modern diesel engines. A soot sensor based on resistivity measurements was developed and characterized. This involved generation of soot particles using a quenched co-flow diffusion flame; depositing the particles onto a sensor substrate using thermophoresis and particle detection using a finger electrode structure, patterned on thermally oxidized silicon substrate. The generated soot particles were characterized using techniques including Scanning Mobility Particle Sizer for mobility size distributions, Differential Mobility Analyzer-Aerosol Particle Mass analyzer for the mass-mobility relationship, and Transmission Electron Microscopy for morphology. The generated particles were similar to particles from diesel engines in concentration, mobility size distribution, and mass fractal dimension. The primary particle size, effective density and organic mass fraction were slightly lower than values reported for diesel engines. The response measured with the sensors was largely dependent on particle mass concentration, but increased with increasing soot aggregate mobility size. Detection down to cumulative mass as small as 20-30 mu g has been demonstrated. The detection limit can be improved by using a more sensitive resistance meter, modified deposition cell, larger flow rates of soot aerosol and modifying the sensor surface.},
  author       = {Malik, Azhar and Abdulhamid, Hussam and Pagels, Joakim and Rissler, Jenny and Lindskog, Magnus and Nilsson, Patrik and Bjorklund, R. and Jozsa, P. and Visser, J. and Spetz, A. and Sanati, Mehri},
  issn         = {1521-7388},
  language     = {eng},
  number       = {2},
  pages        = {284--294},
  publisher    = {Taylor & Francis},
  series       = {Aerosol Science and Technology},
  title        = {A Potential Soot Mass Determination Method from Resistivity Measurement of Thermophoretically Deposited Soot},
  url          = {http://dx.doi.org/10.1080/02786826.2010.533214},
  volume       = {45},
  year         = {2011},
}