Surface Plasmon Field-Enhanced Raman Scattering Based on Evanescent Field Excitation of Waveguide-Coupled Surface Plasmon Resonance Configuration

doi:10.1021/acs.jpcc.9b11018

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	Surface Plasmon Field-Enhanced Raman Scattering Based on Evanescent Field Excitation of Waveguide-Coupled Surface Plasmon Resonance Configuration
	H. T. Zhang,Y. J. Geng,S. P. Xu,W. Q. Xu,Y. Tian,J. Yu,W. Y. Deng,B. Yu and Y. Liu
	2020
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	124 期号:2 页码:1640-1645
摘要	We propose a bimetallic waveguide-coupled surface plasmon resonance (WCSPR) configuration to enhance Raman scattering with an evanescent field excited using surface plasmons. The WCSPR configuration is a five-phase Kretschmann resonance setup composed of a K9 prism/inner Ag film/MgF2 film/outer Ag film/water structure. Incident angle-dependent SERS spectra were measured in the evanescent field on this WCSPR configuration using an in-house-built angle-dependent SPR-SERS microspectrometer. The SERS signal obtained under evanescent field excitation at the SPR angle was 20x higher than that collected using the conventional SPR configuration. The experimental results also proved that the waveguide-coupled surface plasmons in this evanescent field-enhanced SERS spectroscopy setup had electric field penetration depth of at least 500 nm, which is longer than the penetration depth conventional surface plasmons. High-quality SERS signals can still be obtained after adding a 500 nm MgF2 film to the WCSPR configuration due to the deeper penetration depth. This advantage makes it possible to use Ag with a stronger electric field enhancement capability instead of an inert noble metal such as Au in the experiment without worrying about the oxidation of Ag. The enhancement factor of this WCSPR configuration was 6.2 x 10(7). The lowest detectable concentration for the SERS signal of 4-mercaptopyridine reached 1.0 x 10(-)(10) M using the WCSPR configuration. The WCSPR configuration has great potential for label-free sensing and detection of macromolecules and biomolecules.
DOI	10.1021/acs.jpcc.9b11018
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64934
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. T. Zhang,Y. J. Geng,S. P. Xu,W. Q. Xu,Y. Tian,J. Yu,W. Y. Deng,B. Yu and Y. Liu. Surface Plasmon Field-Enhanced Raman Scattering Based on Evanescent Field Excitation of Waveguide-Coupled Surface Plasmon Resonance Configuration[J]. Journal of Physical Chemistry C,2020,124(2):1640-1645.
APA	H. T. Zhang,Y. J. Geng,S. P. Xu,W. Q. Xu,Y. Tian,J. Yu,W. Y. Deng,B. Yu and Y. Liu.(2020).Surface Plasmon Field-Enhanced Raman Scattering Based on Evanescent Field Excitation of Waveguide-Coupled Surface Plasmon Resonance Configuration.Journal of Physical Chemistry C,124(2),1640-1645.
MLA	H. T. Zhang,Y. J. Geng,S. P. Xu,W. Q. Xu,Y. Tian,J. Yu,W. Y. Deng,B. Yu and Y. Liu."Surface Plasmon Field-Enhanced Raman Scattering Based on Evanescent Field Excitation of Waveguide-Coupled Surface Plasmon Resonance Configuration".Journal of Physical Chemistry C 124.2(2020):1640-1645.

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