 ISSN 0235-7216 ISSN 2424-4538 (online) |
2007 m. Nr. 4 Double-layered Ag / Au electrode for SERS spectroscopy:
preparation and application for adsorption studies of
chromophoric compounds
The method for preparation of SERS-active Ag electrodes plated with a thin layer of gold has been elaborated by using the electroless deposition technique based on the reduction of Na3Au(SO3)2 to metallic Au by formaldehyde. The electrodes were used for taking Raman spectra of the SAMs formed from 2-[(2-sulfanylethyl)amino]-1,4-naphthoquinone, and for the adsorbed hemin and protein alcohol dehydrogenase. The possibility to obtain surface enhancement from the lower layer (Ag) and, thereby SERRS spectra of the chromophoric compounds, have been shown. These double-layered electrodes are especially suitable studying the structure of chromophoric cofactors of proteins. Keywords: double-layered Ag / Au electrode, SERRS spectroscopy, 2-[(2-sulfanylethyl)amino]-1,4-naphthoquinone, hemin, alcohol dehydrogenase |
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