Determination of crystallite size in polished graphitized carbon by Raman spectroscopy

Article

关键词: TRANSMISSION ELECTRON-MICROSCOPY;    X-RAY-DIFFRACTION;    LASER RAMAN;    AMORPHOUS-CARBON;    GLASSY-CARBON;    THIN-SECTIONS;    SPECTRA;    SCATTERING;    FILMS;    FIBERS;   

DOI  :  10.1103/PhysRevB.86.134205

来源: SCIE

【 摘 要 】

A series of polished and unpolished sp(2)-nanostructured carbons nanographites obtained from the pyrolysis of various precursor types have been systematically studied by both Raman spectroscopy and x-ray diffraction. The ratio between the intensities of the disorder-induced D band and the first-order graphite G band (I-D/I-G) commonly used up to now to estimate the crystallite diameter L-a displays, in the case of polished graphitized sp(2) carbons, clear spatial heterogeneities and can lead to the overestimation of the intrinsic structural disorder. The full width at half maximum of the G band, which is shown to be insensitive to the polishing process, exhibits a linear dependence on the mean crystallite diameter [FWHM(G) = 14 + 430/L-a] and therefore can be used for an accurate structural characterization of these nanographites.

【 授权许可】

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