Journal article
Contribution of Functional Groups to the Raman Spectrum of Nanodiamond Powders
Chemistry of materials, v 21(2), pp 273-279
27 Jan 2009
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In depth understanding of Raman spectra of carbon nanomaterials led to the extension of this technique from simple carbon allotrope detection (fingerprinting) to analysis of the dimensions and ordering of graphene, graphite and nanotubes. In characterization of nanodiamond powders, which have been attracting attention as one of the most promising carbon nanomaterials, Raman spectroscopy is still mainly used only for detecting the diamond phase because of poor understanding of other spectral features. In this paper, we critically examine different explanations of the broad asymmetric Raman band between 1500 and 1800 cm−1 present in all nanodiamond powders and provide an assignment of the contributing peaks, solving one of the major remaining mysteries in Raman spectroscopy of nanodiamond. By using nanodiamond powders with different and well-controlled surface chemistries, as well as in situ Raman measurements at elevated temperatures, we show that these peaks originate from O−H bending vibrations either from the surface functional groups or adsorbed water with contributions (shoulders) coming from sp2 carbon and CO stretching vibrations. The observation of a strong O−H contribution to the Raman spectrum of nanodiamond raises concerns regarding the use of water as a coolant during the Raman spectra acquisition, because water may affect Raman spectra in the wavenumber ranges corresponding to bending and stretching O−H vibrations.
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Details
- Title
- Contribution of Functional Groups to the Raman Spectrum of Nanodiamond Powders
- Creators
- Vadym MochalinSebastian OsswaldYury Gogotsi
- Publication Details
- Chemistry of materials, v 21(2), pp 273-279
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000262605200015
- Scopus ID
- 2-s2.0-61849170018
- Other Identifier
- 991014969872904721
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Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary