ANYL 341 |
| Results will be presented of X-ray photoelectron spectroscopy (XPS) analysis applied to soot collected from various sources (sample classes) including jet engine exhaust, an oil fired boilers (industrial and residential), diesel engine exhausts using different fuels and wildfire emissions. Spectra reveal a variety of surface oxygen species in addition to carbon fine structure. Components of the C 1s peak include C-C sp2, C-C sp3 and fullerenic structure. Small but consistent differences in peak positions exist between different classes of samples. These differences are larger than those between samples within the same class of source, thereby permitting identification on the basis of peak positions. As significant spectral peak intensity differences exist between samples from different classes, peak intensity provides an additional independent measure of comparison and identification. Finally, selected XPS results will be compared to corresponding HRTEM images to illustrate these complimentary methods for characterizing the carbon nanostructure. |
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Analytical Approaches: Various Techniques and Applications
1:30 PM-4:00 PM, Thursday, 14 September 2006 Moscone Center -- Room 124, Oral
Division of Analytical Chemistry |