Electrochemically fabricated self-aligned 2-D silver/alumina arrays as reliable SERS sensors

Chen Han Huang, Hsing Ying Lin, Shihtse Chen, Chih Yi Liu, Hsiang Chen Chui, Yonhua Tzeng

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

A novel SERS sensor for adenine molecules is fabricated electrochemically using an ordered two-dimensional array of self-aligned silver nanoparticles encapsulated by alumina. Silver is electro-deposited on the interior surfaces at the bottom of nano-channels in a porous anodic aluminum oxide (AAO) film. After etching aluminum, the back-end alumina serves as a SERS substrate. SERS enhancement factor greater than 106 is measured by 532 nm illumination. It exhibits robust chemical stability and emits reproducible Raman signals from repetitive uses for eight weeks. The inexpensive mass production process makes this reliable, durable and sensitive plasmon based optical device promising for many applications.

Original languageEnglish
Pages (from-to)11441-11450
Number of pages10
JournalOptics Express
Volume19
Issue number12
DOIs
Publication statusPublished - 2011 Jun 6

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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