Micro-Raman study of nanodiamonds from Allende meteorite

Arnold Gucsik, Ulrich Ott, Edit Marosits, Anna Karczemska, Marcin Kozanecki, Marian Szurgot

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

We have studied the Raman spectroscopic signatures of nanodiamonds from the Allende meteorite in which some portions must be of presolar origin as indicated by the isotopic compositions of various trace elements. The spectra of the meteoritic nanodiamond show a narrow peak at 1326 cm1 and a broad band at 1590 cm1. Compared to the intensities of these peaks, the background fluorescence is relatively high. A significant frequency shift from 1332 to 1326 cm1, peak broadening, and appearance of a new peak at 1590 cm1 might be due to shock effects during formation of the diamond grains. Such changes may have several origins: an increase in bond length, a change in the electron density function or charge transfer, or a combination of these factors. However, Raman spectroscopy alone does not allow distinguishing between a shock origin of the nanodiamonds and formation by a CVD process as is favored by most workers.

Original languageEnglish
Title of host publicationOrganic Matter in Space
Pages335-339
Number of pages5
EditionS251
DOIs
Publication statusPublished - Oct 13 2008

Publication series

NameProceedings of the International Astronomical Union
NumberS251
Volume4
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

Keywords

  • (Stars:) supernovae: general
  • ISM: evolution
  • Meteoroids
  • Meteors
  • Shock waves

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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  • Cite this

    Gucsik, A., Ott, U., Marosits, E., Karczemska, A., Kozanecki, M., & Szurgot, M. (2008). Micro-Raman study of nanodiamonds from Allende meteorite. In Organic Matter in Space (S251 ed., pp. 335-339). (Proceedings of the International Astronomical Union; Vol. 4, No. S251). https://doi.org/10.1017/S1743921308021893