SILVER NANOCRYSTAL FILM ON POROUS SILICON AS EFFECTIVE SURFACE FOR SURFACE ENHANCED RAMAN SCATTERING. (English)

In the present study, we study the use of porous silicon (por-Si) surfaces with silver nanoparticles deposited by immersion plating as substrates for surface enhanced Raman scattering (SERS). We analyze the influence of the por-Si etching parameters - etchant composition, on its SERS properties after silver deposition. We demonstrate that films of close-packed silver nanocrystals aggregate on por- Si surface prepared at high HF content in the etchant (exceeding 25 %). Through experiments conducted, we show that the film of silver nanocryctals creates strong analyte's Raman signal enhancement due to the high surface density of the crystallites and multiple edges on their surface, and serves as an extremely effective SERS substrate. [ABSTRACT FROM AUTHOR]

Copyright of Naukovi visti NTUU - KPI is the property of National Technical University of Ukraine KPI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)