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  • 1
    Electronic Resource
    Electronic Resource
    Fourier transform Raman spectra of diamond-like carbon films (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 23 (1992), S. 625-628 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Fourier transform (FT) Raman spectra (3500-50 cm-1) were recorded for hard diamond-like carbon (DLC) films deposited on silicon wafer substrates at various temperatures. The observed frequency of the graphitic optic zone center phonon (G) at 1595 cm-1 was found to remain constant with variations in the deposition temperature of the substrate, the excitation wavelength and the laser power. However, the disorder activated optical zone edge phonon (D), observed in the 1380-1250 cm-1 region, exhibits changes in the band maximum frequency with the above-mentioned variables. FT Raman spectroscopy, applied to these films, is shown to be a useful probe for the identification of various different types of diamond-like structures which are present.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250231109
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  • 2
    Electronic Resource
    Electronic Resource
    Micro-Raman study of laser ablated YBa2Cu3O7-δ thin film deposited on inconel with a tin buffer layer (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 25 (1994), S. 275-280 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman spectra of YBa2 Cu3 O7-δ superconducting thin film deposited on Inconel with a TiN buffer layer by a laser ablation technique are reported. The results indicate that the film is fully oxygenated, homogeneous and polycrystalline and has a preferred orientation along the c-axis. No evidence of interdiffusion between the film and the substrate was found. Unusual photoinduced changes in the Raman spectra were observed by varying the incident cw Ar+ (514.5 nm) laser power densities between 50 to 250 ± 5 W mm-2. The increase in the intensity ratios of the out-of-phase and in-phase c-axis bending vibrations of O(2) - O(3) oxygen atoms to that of the axial symmetric stretching vibration of bridging oxygen O(4) (i.e. I337/I503 and /I445/I503) and the decrease in the full-width at half-maximum intensity (FWHM) of the out-of-phase, c-axis bending vibration (337 cm-1) can be attributed to the improvement in the crystallinity of the film due to oxygen ordering in the CuO2 planes induced by laser irradiation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250250406
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    Paper (German National Licenses)
    Fulltext
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