Gold Nanofingers for Molecule Trapping and Detection

被引:183
作者
Hu, Min [1 ]
Ou, Fung Suong [1 ]
Wu, Wei [1 ]
Naumov, Ivan [1 ]
Li, Xuema [1 ]
Bratkovsky, Alexander M. [1 ]
Williams, R. Stanley [1 ]
Li, Zhiyong [1 ]
机构
[1] Hewlett Packard Labs, Informat & Quantum Syst Lab, Palo Alto, CA 94304 USA
关键词
ENHANCED RAMAN-SCATTERING; SPECTROSCOPY; NANOCRYSTALS; LITHOGRAPHY; CIRCUITS; ARRAY;
D O I
10.1021/ja105248h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Here we demonstrate a molecular trap structure that can be formed to capture analyte molecules in solution for detection and identification. The structure is based on gold-coated nanoscale polymer fingers made by nanoimprinting technique. The nanofingers are flexible and their tips can be brought together to trap molecules, while at the same time the gold-coated fingertips form a reliable Raman hot spot for molecule detection and identification based on surface enhanced Raman spectroscopy (SERS). The molecule self-limiting gap size control between fingertips ensures ultimate SERS enhancement for sensitive molecule detection. Furthermore, these type of structures, resulting from top-down meeting self-assembly, can be generalized for other applications, such as plasmonics, meta-materials, and other nanophotonic systems.
引用
收藏
页码:12820 / 12822
页数:3
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