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Fragmentation of Nanoparticle Soot Aggregates during Pulsed Laser Heating: A Combined SMPS, TEM, NEXAFS, and Modeling Study

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Abstract

Carbonaceous nanoparticles (<35 nm) formed from laser-heated soot aggregates were studied using electric mobility sizing, transmission electron microscopy (TEM), and near-edge x- ray absorption fine structure (NEXAFS) spectroscopy. Experimental and modeling results suggest that nanoparticle formation proceeds through volatilization/re-condensation of carbon clusters.

© 2006 Optical Society of America

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