NOVEL BIMETALLIC PLASMONIC NANOVOIDS FOR SERS

摘要

SERS-active arrays of bimetallic nanovoids have been fabricated by Ni electrochemical plating followed by Ag immersion deposition on macroporous silicon (PS). Presence of HF in the solution for Ag deposition has been found to result in fabrication of the SERS-active substrates with 20 times enhanced Raman intensity in comparison with those formed in HF-free solution. The detection limit of R6G adsorbed on the bimetallic substrates has been determined to reach 10~(-11) M.