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The use of compacted metal discs to measure Raman spectra
Author(s) -
Nimmo J. A.,
Bovill A. J.,
McConnell A. A.,
Smith W. E.
Publication year - 1985
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250160406
Subject(s) - raman spectroscopy , aluminium , metal , raman scattering , copper , reflection (computer programming) , fluorescence , analytical chemistry (journal) , materials science , chromium , metal powder , chemistry , chemical engineering , optics , composite material , metallurgy , organic chemistry , physics , computer science , programming language , engineering
Compacted discs prepared from a mixture of finely divided particles of a compound diluted in a large excess of metal powder facilitate the measurement of Raman spectra for some compounds which give poor scattering by conventional techniques. The method is most useful with coloured compounds. The advantages include simplicity, increased signal‐to‐noise ratio by factors of up to 1000 and decreased or altered fluorescence. The effect appears to be caused mainly by small crevices in the compacted metal surface which act as internal mirrors to produce many small multiple‐reflection cells, but there is also evidence of an electronic interaction with the metal surface. Silver, aluminium and copper matrices were studied, silver being found to be the most advantageous, although aluminium under certain conditions may also be effective.