在原子水平上研究了单层WS2在Au（001）、Au（111）和Ag（111）上的拉曼特征

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-05 DOI:10.1016/j.apsusc.2025.163445

Jie Li , Huiru An , Yulong Xiao , Youwen Wang , Guoao Li , Suya Han , Hao Rong , Qingjun Tong , Si-yu Li , Chenfang Lin , Anlian Pan

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引用次数: 0

摘要

贵金属由于具有较强的电磁场增强作用，在尖端和表面增强拉曼光谱中得到了广泛的应用。然而，层状材料与贵金属之间的直接接触会产生不想要的光谱特征。在这项研究中，我们研究了清洁、有序的贵金属表面上单层WS2的拉曼光谱，并观察了生长在Au（111）和Ag（111）上的WS2的额外拉曼峰。在Au（001）上生长的WS2或转移到Ag（111）上的WS2中没有这些峰，其中WS2晶格相对于Ag（11 11）表面旋转了大约15°，而在生长的样品中则是排列的。我们的研究结果提供了有效的方法来降低接触引起的光谱复杂性，从而能够更准确地分析过渡金属二硫族化合物与贵金属表面接触时的电荷转移、应变和缺陷效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Raman signatures of monolayer WS2 on Au(001), Au(111), and Ag(111) studied at the atomic level

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Raman signatures of monolayer WS2 on Au(001), Au(111), and Ag(111) studied at the atomic level

Noble metals are widely used substrates for tip- and surface-enhanced Raman spectroscopy due to their strong electromagnetic field enhancement. However, direct contact between layered materials and noble metals can induce unwanted spectra features. In this study, we investigate Raman spectroscopy of monolayer WS₂ on clean, well-ordered noble metal surfaces and observe additional Raman peaks in WS₂ grown on Au(111) and Ag(111). These peaks are absent in WS₂ grown on Au(001) or transferred onto Ag(111), where the WS₂ lattice is rotated by approximately 15° relative to the Ag(1 1 1) surface, compared to the aligned orientation in the grown samples. Our findings offer effective approaches to reduce metal-contact-induced spectral complexity, enabling more accurate Raman analysis of charge transfer, strain, and defect effects in transition metal dichalcogenides in contact with noble metal surfaces.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.