title: Electrochemically fabricated self-aligned 2-D silver/alumina arrays as reliable SERS sensors.
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 10(6) 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.
authors.affiliation: Institute of Microelectronics, National Cheng Kung University, Tainan, Taiwan.
authors.forename: Chen-Han
authors.initials: CH
authors.lastname: Huang
authors.forename: Hsing-Ying
authors.initials: HY
authors.lastname: Lin
authors.forename: Shihtse
authors.initials: S
authors.lastname: Chen
authors.forename: Chih-Yi
authors.initials: CY
authors.lastname: Liu
authors.forename: Hsiang-Chen
authors.initials: HC
authors.lastname: Chui
authors.forename: Yonhua
authors.initials: Y
authors.lastname: Tzeng
mesh_terms: D000225:Adenine / Q000032:analysis; D000537:Aluminum Oxide / Q000737:chemistry*; D015374:Biosensing Techniques / Q000295:instrumentation*; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods*; D004566:Electrodes; D008855:Microscopy, Electron, Scanning; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D013499:Surface Properties
chemical_list: D012834:Silver; D000225:Adenine; D000537:Aluminum Oxide