Molecular and plasmonic resonances on tip-enhanced Raman spectroscopy

被引：2

作者：

Qiu, Xinmiao ^{[1
,2
]}

Cheng, Yuqing ^{[1
]}

Sun, Mengtao ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China

[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2022年 / 265卷

基金：

中国国家自然科学基金;

关键词：

Molecular resonance; Plasmonic resonance; Tip-enhanced Raman spectroscopy; SCATTERING; POLARITONS; EXCITATION;

D O I：

10.1016/j.saa.2021.120360

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Plasmon has been widely investigated and applied, because it can greatly enhance molecular Raman spectral intensity. In this study, the resonance Raman effect of the tetra-tert-butylnaphthalocyanine (TTBN) is analyzed, including the Raman wave number shift and enhancement factor, resulting from light of different incident wavelengths. Furthermore, the optical properties of TTBN are obtained, such as charge transfer, the electronic circular dichroism (ECD) spectrum, etc. Lastly, we study the tipenhanced Raman spectroscopy (TERS) by adjusting the parameters of the metal tip to achieve the highest electromagnetic enhancement at different incident wavelengths. Combining the resonance excitation effect and the tip enhanced Raman effect, the enhancement factor of TERS can reach up to 10(8)-10(9). This study provides significant help for a profound understanding of the TERS mechanism. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：8

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