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Nanostructure of atmospheric soot particles
AbstractWe studied the structure of atmospheric soot using electron-diffraction-based pair distribution function (PDF) analysis, and compared it with other carbon structures. Two reference materials were used: hydrogen-free amorphous carbon and a kerogen sample with a H/C ratio of 0.61. First-neighbour atomic distances in atmospheric soot are as small as 0.134nm, much shorter than in graphite (0.142nm) or in amorphous carbon (0.141–143nm), but larger than the typical value (0.131–0.132nm) for kerogen. These results suggest that a high molar ratio of hydrogen is present in soot in small-sized aromatic clusters. Such aromatic components can strongly influence the optical properties of soot particles. We found that the quantitative electron diffraction method is an independent and efficient alternative to the commonly used spectroscopic methods for the analysis of the atomic structure of individual soot particles.
Nanostructure of atmospheric soot particles
AbstractWe studied the structure of atmospheric soot using electron-diffraction-based pair distribution function (PDF) analysis, and compared it with other carbon structures. Two reference materials were used: hydrogen-free amorphous carbon and a kerogen sample with a H/C ratio of 0.61. First-neighbour atomic distances in atmospheric soot are as small as 0.134nm, much shorter than in graphite (0.142nm) or in amorphous carbon (0.141–143nm), but larger than the typical value (0.131–0.132nm) for kerogen. These results suggest that a high molar ratio of hydrogen is present in soot in small-sized aromatic clusters. Such aromatic components can strongly influence the optical properties of soot particles. We found that the quantitative electron diffraction method is an independent and efficient alternative to the commonly used spectroscopic methods for the analysis of the atomic structure of individual soot particles.
Nanostructure of atmospheric soot particles
Kis, Viktória Kovács (author) / Pósfai, Mihály (author) / Lábár, János L. (author)
Atmospheric Environment ; 40 ; 5533-5542
2006-05-10
10 pages
Article (Journal)
Electronic Resource
English
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