Paper
31 July 2007 Silver-coated nanoporous silicon as SERS-active substrate for investigation of tetrapyrrolic molecules
A. Yu. Panarin, P.-Y. Turpin
Author Affiliations +
Proceedings Volume 6728, ICONO 2007: Novel Photonics Materials; Optics and Optical Diagnostics of Nanostructures; 672828 (2007) https://doi.org/10.1117/12.752423
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus
Abstract
A fabrication of the surface-enhanced Raman scattering (SERS) active substrates has been developed by immersion plating of the silver onto porous silicon (Ag-por-Si). Effects of the porous silicon morphology on the structure of the Ag films have been analyzed by scanning electronic microscope. Activity of the Ag-coated por-Si toward SERS was estimated using water-soluble porphyrins as analyte molecules. The Ag-por-Si samples were appeared to be sensitive and stable SERS-active substrates. It has been found that the variation of SERS signal scanned over the sample surface is less than 9%. Additionally, plates of Ag-por-Si displayed high sensitivity being stored within 1 month in the air. It was shown that even several minutes incubation of Ag-por-Si in solution is enough to obtain well-defined SERS signal. SERS spectra of the water-soluble cationic tetrakis(N-methylpyridyl)porphyrin (H2TMPyP4) and anionic tetrakis(sulfonatophenyl)porphyrin (H2TPPS) were compared with their resonance Raman (RR) spectra. For the cationic H2TMPyP4 the partial metallation has been detected during impregnation of the porphyrin molecules on the Ag-por-Si surface. In case of the anionic H2TPPS there was no evidence of the silver complex formation.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Yu. Panarin and P.-Y. Turpin "Silver-coated nanoporous silicon as SERS-active substrate for investigation of tetrapyrrolic molecules", Proc. SPIE 6728, ICONO 2007: Novel Photonics Materials; Optics and Optical Diagnostics of Nanostructures, 672828 (31 July 2007); https://doi.org/10.1117/12.752423
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Cited by 8 scholarly publications.
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KEYWORDS
Silver

Silicon

Molecules

Surface enhanced Raman spectroscopy

Particles

Raman spectroscopy

Metals

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