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Preparation of substrates for surface‐enhanced Raman microprobe spectroscopy
Author(s) -
Sutherland W. S.,
Winefordner J. D.
Publication year - 1991
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.1250221002
Subject(s) - microprobe , raman spectroscopy , materials science , analytical chemistry (journal) , chemical vapor deposition , chemical engineering , metal , yield (engineering) , reproducibility , nanotechnology , chemistry , mineralogy , chromatography , optics , composite material , metallurgy , physics , engineering
The results obtained using a variety of new solid supports for the preparation of surface‐enhanced Raman‐active substrates via direct chemical reduction of silver salts and by vacuum vapor deposition of metallic silver are presented. These supports include two small pore size cellulose filter papers and frosted glass slides. These supports yield silver substrates with a much more uniform silver particle size and distribution than observed on previously used supports such as Whatman No. 1 and No. 5 filter papers. Results obtained using a solid silver membrane filter are also presented. These substrates provide metal particle morphology which is uniform on a submicrometer scale. This degree of uniformity is necessary for enhancing the reproducibility of SERS using a Raman microprobe since the area probed by this microprobe is 5–10 μm 2 . By using filter papers and glass slides, coupled with the vapor deposition and chemical reduction techniques, the resulting substrates are also fast, simple, and inexpensive, making them ideal candidates for routine analysis.