Aligned gold nanoneedle arrays for surface-enhanced Raman scattering.
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.
Yang
Yong
Y
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
Tanemura
Masaki
M
Huang
Zhengren
Z
Jiang
Dongliang
D
Li
Zhi-Yuan
ZY
Huang
Ying-ping
YP
Kawamura
Go
G
Yamaguchi
Kohei
K
Nogami
Masayuki
M
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
D001128:Argon; D006046:Gold