Nanostructure of atmospheric soot particles

Viktória Kovács Kis, M. Pósfai, J. Lábár

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

We 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 0.134 nm, much shorter than in graphite (0.142 nm) or in amorphous carbon (0.141-143 nm), but larger than the typical value (0.131-0.132 nm) 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.

Original languageEnglish
Pages (from-to)5533-5542
Number of pages10
JournalAtmospheric Environment
Volume40
Issue number29
DOIs
Publication statusPublished - Sep 2006

Fingerprint

soot
Soot
Nanostructures
Kerogen
Amorphous carbon
kerogen
Electron diffraction
diffraction
carbon
hydrogen
electron
Hydrogen
optical property
graphite
Distribution functions
Graphite
Optical properties
particle
Carbon
analysis

Keywords

  • Aromatic structures
  • Electron diffraction
  • Nanostructure
  • Soot

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)
  • Pollution

Cite this

Nanostructure of atmospheric soot particles. / Kis, Viktória Kovács; Pósfai, M.; Lábár, J.

In: Atmospheric Environment, Vol. 40, No. 29, 09.2006, p. 5533-5542.

Research output: Contribution to journalArticle

Kis, Viktória Kovács ; Pósfai, M. ; Lábár, J. / Nanostructure of atmospheric soot particles. In: Atmospheric Environment. 2006 ; Vol. 40, No. 29. pp. 5533-5542.
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