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Proc Natl Acad Sci U S A

Title:		Viscosity of alpha-pinene secondary organic material and implications for particle growth and reactivity
Author(s):		Renbaum-Wolff L; Grayson JW; Bateman AP; Kuwata M; Sellier M; Murray BJ; Shilling JE; Martin ST; Bertram AK;
Address:		"Department of Chemistry, University of British Columbia, Vancouver, BC, Canada V6T 1Z1"
Journal Title:		Proc Natl Acad Sci U S A
Year:		2013
Volume:		20130425
Issue:		20
Page Number:		8014 - 8019
DOI:		10.1073/pnas.1219548110
ISSN/ISBN:		1091-6490 (Electronic) 0027-8424 (Print) 0027-8424 (Linking)
Abstract:		"Particles composed of secondary organic material (SOM) are abundant in the lower troposphere. The viscosity of these particles is a fundamental property that is presently poorly quantified yet required for accurate modeling of their formation, growth, evaporation, and environmental impacts. Using two unique techniques, namely a 'bead-mobility' technique and a 'poke-flow' technique, in conjunction with simulations of fluid flow, the viscosity of the water-soluble component of SOM produced by alpha-pinene ozonolysis is quantified for 20- to 50-mum particles at 293-295 K. The viscosity is comparable to that of honey at 90% relative humidity (RH), similar to that of peanut butter at 70% RH, and at least as viscous as bitumen at
Keywords:		Aerosols Air Pollutants Atmosphere Bicyclic Monoterpenes Climate Environmental Monitoring/methods Gases Monoterpenes/*chemistry Nitrogen/chemistry Oxygen/chemistry Ozone/chemistry Particle Size Solubility Temperature Viscosity Volatile Organic Compounds V;
Notes:		"MedlineRenbaum-Wolff, Lindsay Grayson, James W Bateman, Adam P Kuwata, Mikinori Sellier, Mathieu Murray, Benjamin J Shilling, John E Martin, Scot T Bertram, Allan K eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2013/04/27 Proc Natl Acad Sci U S A. 2013 May 14; 110(20):8014-9. doi: 10.1073/pnas.1219548110. Epub 2013 Apr 25"