Enhancement at the junction of silver nanorods

Langmuir. 2008 Aug 19;24(16):8934-8. doi: 10.1021/la800845h. Epub 2008 Jul 11.

Abstract

The enhancement of surface enhanced Raman scattering (SERS) at the junction of linearly joined silver nanorods (31 nm in diameter) deposited in the pores of anodic aluminum oxide templates was studied systematically by excitation with a 632.8 nm laser line. The single and joined silver nanorod arrays showed a similar extinction spectrum when their length was the same. Maximum enhancement was observed from the junction system of two nanorods of the same size with a total length of 62 nm. This length also corresponded to the optimum length of single nanorods for SERS by excitation with a 632.8 nm laser line. The enhancement at the junction was approximately 40 times higher than that of the 31 nm single nanorod, while it was 4 times higher than that of the 62 nm single nanorod. The enhancement factor at the junction after oxide removal was approximately 3.9 x 10 (9).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Metal Nanoparticles / chemistry*
  • Microscopy, Electron, Scanning
  • Nanotubes / chemistry*
  • Nanotubes / ultrastructure
  • Silver / chemistry*
  • Spectrum Analysis

Substances

  • Silver