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Gold Nanocrystals as a Substrate for Microraman Spectroscopy

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Author(s): Т.I. Borodinova | V.G. Кravets | V.R. Romanyuk

Journal: Journal of Nano- and Electronic Physics
ISSN 2077-6772

Volume: 4;
Issue: 2;
Start page: 02039-1;
Date: 2012;
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Keywords: Nanocrystals | Gold | Microraman spectroscopy | Rhodamine R6

ABSTRACT
The Raman spectra of rhodamine R6G dye molecules in polymethyl methacrylate were investigated by using microraman spectroscopy technique. It was shown that these spectra are enhanced due to the presence of the gold nanocrystals. As the substrates, we used washed from organic over layer the gold crystals which possess shape of thin nanoprisms with basement of the equilateral triangles, truncated triangles, and hexagons. It was found that the highest intensities of certain Raman peaks are enhanced up to 104 times when the Raman signal is excited with laser beam (lexc  632,8 nm) focused on an apex of gold nanoprism. We have discussed the possible mechanisms of the revealed enhancement.
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