{"title":"用于表面增强拉曼光谱的二维 MoTe2 薄膜的相变。","authors":"Caiye Zhao, Junwen Huang","doi":"10.3390/molecules29215216","DOIUrl":null,"url":null,"abstract":"<p><p>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-MoTe<sub>2</sub> 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 MoTe<sub>2</sub> films. 1T'-MoTe<sub>2</sub> films showed a strong SERS effect with a detection limit of 1 × 10<sup>-9</sup> M for the R6G molecule, which is one order of magnitude lower than that of 2H-MoTe<sub>2</sub> films. We demonstrated that the SERS sensitivity of MoTe<sub>2</sub> films is derived from the efficient photoinduced charge transfer process between MoTe<sub>2</sub> and adsorbed molecules. Moreover, a prohibited fish drug could be detected by using 1T'-MoTe<sub>2</sub> films as SERS substrates. Our study paves the way to the development and application of high-performance SERS substrates based on TMD phase engineering.</p>","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":"{\"title\":\"Phase Transformation on Two-Dimensional MoTe<sub>2</sub> Films for Surface-Enhanced Raman Spectroscopy.\",\"authors\":\"Caiye Zhao, Junwen Huang\",\"doi\":\"10.3390/molecules29215216\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>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-MoTe<sub>2</sub> 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 MoTe<sub>2</sub> films. 1T'-MoTe<sub>2</sub> films showed a strong SERS effect with a detection limit of 1 × 10<sup>-9</sup> M for the R6G molecule, which is one order of magnitude lower than that of 2H-MoTe<sub>2</sub> films. We demonstrated that the SERS sensitivity of MoTe<sub>2</sub> films is derived from the efficient photoinduced charge transfer process between MoTe<sub>2</sub> and adsorbed molecules. Moreover, a prohibited fish drug could be detected by using 1T'-MoTe<sub>2</sub> films as SERS substrates. Our study paves the way to the development and application of high-performance SERS substrates based on TMD phase engineering.</p>\",\"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}","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}
Phase Transformation on Two-Dimensional MoTe2 Films for Surface-Enhanced Raman Spectroscopy.
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.
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.
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