@article {17380,
	title = {OH-Initiated Oxidation of m-Xylene on Black Carbon Aging},
	journal = {Environmental Science \& TechnologyEnvironmental Science \& Technology},
	volume = {50},
	number = {16},
	year = {2016},
	note = {Dt7ghTimes Cited:2Cited References Count:62},
	month = {Aug 16},
	pages = {8605-8612},
	abstract = {Laboratory experiments are conducted to investigate aging of size-classified black carbon (BC) particles from OH-initiated oxidation of m-xylene. The variations in the particle size, mass, effective density, morphology, optical properties, hygroscopicity, and activation as cloud condensation nuclei (CCN) are simultaneously measured by a suite of aerosol instruments, when BC particles are exposed to the oxidation products of the OH-m-xylene reactions. The BC aging is governed by the coating thickness (Delta r(ve)), which is correlated to the reaction time and initial concentrations of m-xylene and NOx. For an initial diameter of 100 nm and Delta r(ve) = 44 nm, the particle size and mass increase by a factor of 1.5 and 10.4, respectively, and the effective density increases from 0.43 to 1.45 g cm(-3) due to organic coating and collapsing of the BC core. The BC particles are fully converted from a highly fractal to nearly spherical morphology for Delta r(ve) = 30 nm. The scattering, absorption, and single scattering albedo of BC particles are enhanced accordingly with organic coating. The critical supersaturation for CCN activation is reduced to 0.1\% with Delta r(ve) = 44 nm. The results imply that the oxidation of m-xylene exhibits larger impacts in modifying the BC particle properties than those for the OH-initiated oxidation of isoprene and toluene.},
	keywords = {enhanced light-absorption, heterogeneous chemistry, mixing state, mobility relationship, optical-properties, particles, secondary organic aerosol, shock-tube, soot aerosol, sulfuric-acid},
	isbn = {0013-936X},
	author = {Guo, S. and Hu, M. and Y. Lin and Gomez-Hernandez, M. and Zamora, M. L. and Peng, J. F. and Collins, D. R. and Zhang, R. Y.}
}
