Phase Transformation on Two-Dimensional MoTe₂ Films for Surface-Enhanced Raman Spectroscopy.

IF 4.2 2区化学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Molecules Pub Date : 2024-11-04 DOI:10.3390/molecules29215216

Caiye Zhao, Junwen Huang

{"title":"Phase Transformation on Two-Dimensional MoTe2 Films for Surface-Enhanced Raman Spectroscopy.","authors":"Caiye Zhao, Junwen Huang","doi":"10.3390/molecules29215216","DOIUrl":null,"url":null,"abstract":"Two-dimensional (2D) transition metal dichalcogenides (TMDs) have recently become attractive candidate substrates for surface-enhanced Raman spectroscopy (SERS) owing to their atomically flat surfaces and adjustable electronic properties. Herein, large-scale 2D 1T'- and 2H-MoTe2 films were prepared using a chemical vapor deposition method. We found that phase structure plays an important role in the enhancement of the SERS performances of MoTe2 films. 1T'-MoTe2 films showed a strong SERS effect with a detection limit of 1 × 10-9 M for the R6G molecule, which is one order of magnitude lower than that of 2H-MoTe2 films. We demonstrated that the SERS sensitivity of MoTe2 films is derived from the efficient photoinduced charge transfer process between MoTe2 and adsorbed molecules. Moreover, a prohibited fish drug could be detected by using 1T'-MoTe2 films as SERS substrates. Our study paves the way to the development and application of high-performance SERS substrates based on TMD phase engineering.","PeriodicalId":19041,"journal":{"name":"Molecules","volume":"29 21","pages":""},"PeriodicalIF":4.2000,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547442/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecules","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.3390/molecules29215216","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Two-dimensional (2D) transition metal dichalcogenides (TMDs) have recently become attractive candidate substrates for surface-enhanced Raman spectroscopy (SERS) owing to their atomically flat surfaces and adjustable electronic properties. Herein, large-scale 2D 1T'- and 2H-MoTe₂ films were prepared using a chemical vapor deposition method. We found that phase structure plays an important role in the enhancement of the SERS performances of MoTe₂ films. 1T'-MoTe₂ films showed a strong SERS effect with a detection limit of 1 × 10^-9 M for the R6G molecule, which is one order of magnitude lower than that of 2H-MoTe₂ films. We demonstrated that the SERS sensitivity of MoTe₂ films is derived from the efficient photoinduced charge transfer process between MoTe₂ and adsorbed molecules. Moreover, a prohibited fish drug could be detected by using 1T'-MoTe₂ films as SERS substrates. Our study paves the way to the development and application of high-performance SERS substrates based on TMD phase engineering.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

用于表面增强拉曼光谱的二维 MoTe2 薄膜的相变。

二维（2D）过渡金属二卤化物（TMDs）因其原子平整的表面和可调节的电子特性，最近已成为表面增强拉曼光谱（SERS）的极具吸引力的候选基底。本文采用化学气相沉积法制备了大规模二维 1T'- 和 2H-MoTe2 薄膜。我们发现，相结构对提高 MoTe2 薄膜的 SERS 性能起着重要作用。1T'-MoTe2 薄膜显示出很强的 SERS 效应，对 R6G 分子的检测限为 1 × 10-9 M，比 2H-MoTe2 薄膜低一个数量级。我们证明了 MoTe2 薄膜的 SERS 灵敏度来自于 MoTe2 与吸附分子之间高效的光诱导电荷转移过程。此外，使用 1T'-MoTe2 薄膜作为 SERS 基底，可以检测到一种违禁鱼药。我们的研究为开发和应用基于 TMD 相工程的高性能 SERS 基底铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Molecules 化学-有机化学

CiteScore

7.40

自引率

8.70%

发文量

7524

审稿时长

1.4 months

期刊介绍： Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.