Aligned gold nanoneedle arrays for surface-enhanced Raman scattering
Authors:
- Yong YangYong Yang
- Masaki TanemuraMTMasaki Tanemura
- Zhengren HuangZHZhengren Huang
- Dongliang JiangDJDongliang Jiang
- Zhi-Yuan LiZLZhi-Yuan Li
- Ying-Ping HuangYHYing-Ping Huang
- Go KawamuraGKGo Kawamura
- Kohei YamaguchiKYKohei Yamaguchi
- Masayuki NogamiMNMasayuki Nogami
- 19 July 2010
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 21 (32) , 325701
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.Keywords
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