{"title":"WS2/WO3 heterostructure for surface-enhanced Raman spectroscopy","authors":"","doi":"10.1016/j.vacuum.2024.113717","DOIUrl":null,"url":null,"abstract":"<div><div>Advancing the creation of cost-effective, stable, and uniform surface-enhanced Raman scattering (SERS) substrates that do not rely on noble metals is a crucial objective in current SERS studies. This study introduces a straightforward synthesis of heterostructures via the oxidation treatment of two-dimensional (2D) materials. Utilizing a hydrothermal reaction, we synthesized nanoflower-like WS<sub>2</sub> 2D materials and subsequently fabricated WS<sub>2</sub>/WO<sub>3</sub> heterostructures with exceptional controllability and reproducibility following oxidation treatment. This heterostructure, characterized by its unique surface structure and appropriate band gap, substantially improves charge transfer efficiency, thereby enhancing SERS performance. The composite substrate, which relies on a chemical enhancement mechanism, demonstrates high-sensitivity quantitative detection capabilities, achieving the detection limit for R6G molecules was established at 10<sup>−10</sup> M, with an enhancement factor of 0.94 × 10<sup>8</sup>. Additionally, a strong linear relationship between concentration and peak intensity is observed. Moreover, the substrate exhibits outstanding stability and uniformity, along with excellent quantitative analysis capabilities for molecules such as methylene blue and crystal violet. These attributes underscore its promising potential in environmental monitoring applications.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X24007632","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Advancing the creation of cost-effective, stable, and uniform surface-enhanced Raman scattering (SERS) substrates that do not rely on noble metals is a crucial objective in current SERS studies. This study introduces a straightforward synthesis of heterostructures via the oxidation treatment of two-dimensional (2D) materials. Utilizing a hydrothermal reaction, we synthesized nanoflower-like WS2 2D materials and subsequently fabricated WS2/WO3 heterostructures with exceptional controllability and reproducibility following oxidation treatment. This heterostructure, characterized by its unique surface structure and appropriate band gap, substantially improves charge transfer efficiency, thereby enhancing SERS performance. The composite substrate, which relies on a chemical enhancement mechanism, demonstrates high-sensitivity quantitative detection capabilities, achieving the detection limit for R6G molecules was established at 10−10 M, with an enhancement factor of 0.94 × 108. Additionally, a strong linear relationship between concentration and peak intensity is observed. Moreover, the substrate exhibits outstanding stability and uniformity, along with excellent quantitative analysis capabilities for molecules such as methylene blue and crystal violet. These attributes underscore its promising potential in environmental monitoring applications.
期刊介绍:
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.