Silver-coated nanoporous silicon as SERS-active substrate for investigation of tetrapyrrolic molecules

A. Yu. Panarin; P.-Y. Turpin

doi:10.1117/12.752423

31 July 2007 Silver-coated nanoporous silicon as SERS-active substrate for investigation of tetrapyrrolic molecules

A. Yu. Panarin, P.-Y. Turpin

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.

Citation Download Citation

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

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available