Gold Nanocrystals as a Substrate for Microraman Spectroscopy

Authors Т.I. Borodinova1 , V.G. Кravets2, V.R. Romanyuk3
Affiliations

2 Faculty of Engineering and Physical Sciences, the University of Manchester, Oxford Road, Manchester, M13 9PL

1 F.D. Ovcharenko Institute of Biocolloid Chemistry NAS of Ukraine, 42 Vernadsky Avenue, Kyiv 03680, Ukraine

2 Faculty of Engineering and Physical Sciences, the University of Manchester, Oxford Road, Manchester, M13 9PL

3 V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 03028 Kyiv, Ukraine

Е-mail [email protected]
Issue Volume 4, Year 2012, Number 2
Dates Received 09 April 2012; revised manuscript received 23 May 2012; published online 04 June 2012
Citation Т.I. Borodinova, V.G. Кravets, V.R. Romanyuk, J. Nano- Electron. Phys. 4 No 2, 02039 (2012)
DOI
PACS Number(s) 1.46.Hk, 78.30. – j
Keywords Nanocrystals (3) , Gold (8) , Microraman spectroscopy, Rhodamine R6G.
Annotation 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.

List of References