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Characteristics of airborne gold aggregates generated by spark discharge and high temperature evaporation furnace: Mass-mobility relationship and surface area

Svensson, Christian LU ; Ludvigsson, Linus LU ; Meuller, Bengt LU ; Eggersdorfer, M. L.; Deppert, Knut LU ; Bohgard, Mats LU ; Pagels, Joakim LU ; Messing, Maria LU and Rissler, Jenny LU (2015) In Journal of Aerosol Science 87. p.38-52
Abstract
The properties of gas-borne aggregates are important in nano-technology and for potential health effects. Gold aggregates from three generators (one commercial and one custom built spark discharge generator and one high-temperature furnace) have been characterized. The aggregate surface areas were determined using five approaches - based on aggregation theory and/or measured aggregate properties. The characterization included mass-mobility relationships, effective densities (assessed by an Aerosol Particles Mass analyzer), primary particle analysis (based on Transmission Electron Microscopy), as well as total mass and number concentration outputs. The relationships between mass and mobility are well described by power-law functions with... (More)
The properties of gas-borne aggregates are important in nano-technology and for potential health effects. Gold aggregates from three generators (one commercial and one custom built spark discharge generator and one high-temperature furnace) have been characterized. The aggregate surface areas were determined using five approaches - based on aggregation theory and/or measured aggregate properties. The characterization included mass-mobility relationships, effective densities (assessed by an Aerosol Particles Mass analyzer), primary particle analysis (based on Transmission Electron Microscopy), as well as total mass and number concentration outputs. The relationships between mass and mobility are well described by power-law functions with exponents of 2.18-2.35. For all generators, the primary particles of the aggregates were fused together by a bridge with a diameter typically similar to 60-70% of the primary particle diameter (5-10 nm). The total mass outputs were 6.1-48.1 mg/m3 and the predicted surface area outputs in the range 0.9 x 10(-3)-17 x 10(-3) cm(2)/cm(3). The aggregate effective densities differed considerably between generators. The difference could partly be explained by the differences in primary particle diameter, but not fully. This in turn may be explained either by a varying primary particle size with aggregate size, or by that there are slight differences in the morphology of the aggregates from the generators. (C) 2015 The Authors. Published by Elsevier Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aerosol particle mass analyzer, Surface area, Electrical mobility, Mass, mobility exponent, High temperature evaporation, condensation, Spark, discharge generator
in
Journal of Aerosol Science
volume
87
pages
38 - 52
publisher
Elsevier
external identifiers
  • wos:000358626000004
  • scopus:84930202681
ISSN
0021-8502
DOI
10.1016/j.jaerosci.2015.05.004
language
English
LU publication?
yes
id
26a1a184-bc13-42b0-95e9-73b6f2267845 (old id 7767691)
date added to LUP
2015-09-02 11:17:52
date last changed
2017-01-01 05:46:34
@article{26a1a184-bc13-42b0-95e9-73b6f2267845,
  abstract     = {The properties of gas-borne aggregates are important in nano-technology and for potential health effects. Gold aggregates from three generators (one commercial and one custom built spark discharge generator and one high-temperature furnace) have been characterized. The aggregate surface areas were determined using five approaches - based on aggregation theory and/or measured aggregate properties. The characterization included mass-mobility relationships, effective densities (assessed by an Aerosol Particles Mass analyzer), primary particle analysis (based on Transmission Electron Microscopy), as well as total mass and number concentration outputs. The relationships between mass and mobility are well described by power-law functions with exponents of 2.18-2.35. For all generators, the primary particles of the aggregates were fused together by a bridge with a diameter typically similar to 60-70% of the primary particle diameter (5-10 nm). The total mass outputs were 6.1-48.1 mg/m3 and the predicted surface area outputs in the range 0.9 x 10(-3)-17 x 10(-3) cm(2)/cm(3). The aggregate effective densities differed considerably between generators. The difference could partly be explained by the differences in primary particle diameter, but not fully. This in turn may be explained either by a varying primary particle size with aggregate size, or by that there are slight differences in the morphology of the aggregates from the generators. (C) 2015 The Authors. Published by Elsevier Ltd.},
  author       = {Svensson, Christian and Ludvigsson, Linus and Meuller, Bengt and Eggersdorfer, M. L. and Deppert, Knut and Bohgard, Mats and Pagels, Joakim and Messing, Maria and Rissler, Jenny},
  issn         = {0021-8502},
  keyword      = {Aerosol particle mass analyzer,Surface area,Electrical mobility,Mass,mobility exponent,High temperature evaporation,condensation,Spark,discharge generator},
  language     = {eng},
  pages        = {38--52},
  publisher    = {Elsevier},
  series       = {Journal of Aerosol Science},
  title        = {Characteristics of airborne gold aggregates generated by spark discharge and high temperature evaporation furnace: Mass-mobility relationship and surface area},
  url          = {http://dx.doi.org/10.1016/j.jaerosci.2015.05.004},
  volume       = {87},
  year         = {2015},
}