Darkfield microspectroscopy of nanostructures on silver tip-enhanced Raman scattering probes

被引：16
作者：
Itoh, Tamitake [1 ]
Yamamoto, Yuko S. [2 ,3 ]
Suzuki, Toshiaki [4 ]
Kitahama, Yasutaka [5 ]
Ozaki, Yukihiro [5 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Hlth Technol Res Ctr, Nanobioanaly Team, Takamatsu, Kagawa 7610395, Japan
[2] Japan Soc Promot Sci, Chiyoda Ku, Tokyo 1028472, Japan
[3] Kagawa Univ, Sch Sci & Technol, Dept Chem, Takamatsu, Kagawa 7610396, Japan
[4] UNISOKU Co Ltd, 2-4-3 Kasugano, Hirakata, Osaka 5730131, Japan
[5] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda, Hyogo 6691337, Japan
来源：
APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 02期
基金：
日本科学技术振兴机构;
关键词：
CHEMICAL-ANALYSIS; SPECTROSCOPY;
D O I：
10.1063/1.4939982
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report an evaluation method employing darkfield microspectroscopy for silver probes used in tip-enhanced Raman scattering (TERS). By adjusting the darkfield illumination, the diffracted light from the probe outlines disappears and the diffracted light from the surface nanostructures and tips of the probes appears as colorful spots. Scanning electron microscopy reveals that the spectral variations in these spots reflect the shapes of the surface nanostructures. The tip curvatures correlate to the spectral maxima of their spots. Temporal color changes in the spots indicate the deterioration due to the oxidation of the silver surfaces. These results show that the proposed method is useful for in situ evaluation of plasmonic properties of TERS probes. (C) 2016 AIP Publishing LLC.
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页数：5
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