Synthesis of Gold Nanostar Arrays as Reliable, Large-Scale, Homogeneous Substrates for Surface-Enhanced Raman Scattering Imaging and Spectroscopy

被引：60
|
作者：
Osinkina, L.
Lohmueller, T. [1 ]
Jaeckel, F.
Feldmann, J.
机构：
[1] Univ Munich, Dept Phys, Photon & Optoelect Grp, D-80799 Munich, Germany
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2013年 / 117卷 / 43期
关键词：
SERS SUBSTRATE; SILVER; MOLECULES; ACID; NANOPARTICLES; ORGANIZATION; SPECTRA; SIZE;
D O I：
10.1021/jp312149d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report a two-step approach for the fabrication of quasi-hexagonal ordered arrays of star-shaped gold nanoparticles (gold nanostars) as reliable, large-scale homogeneous substrates for surface-enhanced Raman scattering (SERS) spectroscopy by a combination of block-copolymer micelle nanolithography and electroless deposition. The applicability of this platform for SERS imaging is demonstrated by pH-sensitive Raman measurements of 4-mercaptobenzoic acid adsorbed to the nanostars in the array. A homogeneous enhancement factor of similar to 10(5) was observed on the nanostar monolayer over an area of several hundreds of square micrometers.
引用
收藏
页码：22198 / 22202
页数：5
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