title: Aligned gold nanoneedle arrays for surface-enhanced Raman scattering.
abstract: A simple Ar(+)-ion irradiation route has been developed to prepare gold nanoneedle arrays on glass substrates for surface-enhanced Raman scattering (SERS)-active substrates. The nanoneedles exhibited very sharp tips with an apex diameter of 20 nm. These arrays were evaluated as potential SERS substrates using malachite green molecules and exhibited a SERS enhancement factor of greater than 10(8), which is attributed to the localized electron field enhancement around the apex of the needle and the surface plasmon coupling originating from the periodic structure. This work demonstrates a new technique for producing controllable and reproducible SERS substrates potentially applicable for chemical and biological assays.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China. yangyong@mail.sic.ac.cn
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Masaki
authors.initials: M
authors.lastname: Tanemura
authors.forename: Zhengren
authors.initials: Z
authors.lastname: Huang
authors.forename: Dongliang
authors.initials: D
authors.lastname: Jiang
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Li
authors.forename: Ying-ping
authors.initials: YP
authors.lastname: Huang
authors.forename: Go
authors.initials: G
authors.lastname: Kawamura
authors.forename: Kohei
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Masayuki
authors.initials: M
authors.lastname: Nogami
mesh_terms: D001128:Argon / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
chemical_list: D001128:Argon; D006046:Gold