尖端增强拉曼光谱主动尖端的快速制造和判断

IF 1.2 4区 化学 Q4 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL
Xianbiao Zhang, Yu-Fan Zhang, Hang Li, Jie Cui, Song Jiang, Ben Yang, Yang Zhang, Yao Zhang, Z. Dong
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引用次数: 4

摘要

扫描针尖的质量对于实现大信号增强和高空间分辨率的针尖增强拉曼光谱(TERS)实验至关重要。在这项工作中,我们报道了一种可控的制造方法,通过在原子尺度上修改尖端尖端来制备TERS活性尖端,并提出了两个重要的标准来原位判断尖端增强拉曼测量的TERS活性。一个标准是基于第一图像电势状态的降档,以监测远场入射激光和近场等离子体激元之间的耦合;另一种是基于与尖端顶点处的原子突起相关联的低波数拉曼峰的出现来判断从近场到远场的发射的耦合效率。这项工作为在靶分子和其他材料上进行真正的TERS实验之前快速制造和判断TERS活性尖端提供了一种有效的方法,被认为有助于TERS和其他尖端增强光谱技术的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fast fabrication and judgement of tip-enhanced Raman spectroscopy-active tips
The quality of the scanning tip is crucial for tip-enhanced Raman spectroscopy (TERS) experiments towards large signal enhancement and high spatial resolution. In this work, we report a controllable fabrication method to prepare TERS-active tips by modifying the tip apex at the atomic scale, and propose two important criteria to in-situ judge the tip's TERS activity for tip-enhanced Raman measurements. One criterion is based on the downshift of the first image potential state to monitor the coupling between the far-field incident laser and near-field plasmon; the other is based on the appearance of the low-wavenumber Raman peaks associated with an atomistic protrusion at the tip apex to judge the coupling efficiency of emissions from the near field to the far field. This work provides an effective method to quickly fabricate and judge TERS-active tips before real TERS experiments on target molecules and other materials, which is believed to be instrumental for the development of TERS and other tip-enhanced spectroscopic techniques.
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来源期刊
Chinese Journal of Chemical Physics
Chinese Journal of Chemical Physics 物理-物理:原子、分子和化学物理
CiteScore
1.90
自引率
10.00%
发文量
2763
审稿时长
3 months
期刊介绍: Chinese Journal of Chemical Physics (CJCP) aims to bridge atomic and molecular level research in broad scope for disciplines in chemistry, physics, material science and life sciences, including the following: Theoretical Methods, Algorithms, Statistical and Quantum Chemistry Gas Phase Dynamics and Structure: Spectroscopy, Molecular Interactions, Scattering, Photochemistry Condensed Phase Dynamics, Structure, and Thermodynamics: Spectroscopy, Reactions, and Relaxation Processes Surfaces, Interfaces, Single Molecules, Materials and Nanosciences Polymers, Biopolymers, and Complex Systems Other related topics
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