Ternary Nucleation as a mechanism for the production of Diesel Nanoparticles: An experimental analysis of the Volatile and Hygroscopic Properties of Diesel Exhaust using the VH-TDMA
Meyer, Nickolas K. & Ristovski, Zoran (2007) Ternary Nucleation as a mechanism for the production of Diesel Nanoparticles: An experimental analysis of the Volatile and Hygroscopic Properties of Diesel Exhaust using the VH-TDMA. Environmental Science and Technology.
The volatile and hygroscopic properties of diesel nanoparticles were simultaneously determined under a range of engine loads using the Volatilisation and Humidification Tandem Differential Mobility Analyser (VH-TDMA). Additionally, the VH-TDMA was used to measure changes in the hygroscopic behaviour of the heterogeneously nucleated diesel nanoparticles as one or more semi-volatile species were removed via thermal evaporation or decomposition. Particles produced at high loads exhibited high, dual step volatility while those particles produced at low loads were less volatile and exhibited continuous volatilization curves. The hygroscopic growth factor of the particles was shown to be load dependent with high load particles exhibiting growth factors similar to that of ammonium sulphate. At 85% relative humidity particles produced at moderate loads exhibited growth factors of ~1.1 while low load particles were shown to be hydrophobic. Growth factors and volatilization temperatures measured for high load particles clearly indicate that ternary nucleation is involved in particle formation.
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|Item Type:||Journal Article|
|Additional Information:||This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.|
|Keywords:||nanoparticles, diesel exhaust, VH, TDMA|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2007 American Chemical Society|
|Copyright Statement:||The contents of this journal can be freely accessed online via the ACS web page 12 months after publication. See link to ACS website.|
|Deposited On:||17 Sep 2007|
|Last Modified:||29 Feb 2012 23:39|
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