Abstract
Two different black silicon nanostructured surfaces modified with thin gold layers were tested for analytical signal enhancement with Surface-Enhanced Raman Spectroscopy (SERS). The relationship between the thicknesses of the gold layers and the analytical signal enhancement was studied. Also, effects of Ti and Ti/Pt adhesion layers underneath the gold layers on the analytical signal enhancement were tested. An enhancement factor of 7.6 x 10(7) with the excitation laser 785 nm was achieved for the tested analyte, Rhodamine 6G, and non-resonance SER spectra were recorded in a 5 s acquisition mode. Such an enhancement enables to achieve a detection limit down to 2.4 pg of Rhodamine 6G on a black silicon-based nanosurface coated with a 400-nm-thin layer of gold.
Original language | English |
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Journal | Journal of Raman Spectroscopy |
Volume | 40 |
Issue number | 8 |
Pages (from-to) | 982-986 |
ISSN | 0377-0486 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- nanosurfaces
- enhancement
- Rhodamine 6G
- SERS