Uniformly enhanced Raman scattering on arrays of silver nanoparticles separated by 5 nm gaps
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Issue
6324
Pages
63240Q-1 - 63240Q-8
ISBN
0819464031
9780819464033
Date Issued
2006
Author(s)
Abstract
Different arrays of Ag-nanoparticles grown on anodic alumina nanochannels with precisely tunable gaps (5~25 nm) are exploited for surface-enhanced Raman spectroscopy (SERS). The enhancement becomes significant for gaps below 10 nm and turns dramatically large when gaps reach an unprecedented value of 5 nm. The results are quantitatively consistent with theories based on collectively coupled surface plasmon. Such nanofabricated substrates with consistently uniform and large dynamic range have many chemical/biological sensing applications.
Type
conference paper