期刊
APPLIED SURFACE SCIENCE
卷 527, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.146769
关键词
1T/2H-MS2 nanosheets; SERS; Long-term stability; Large-scale uniformity
类别
资金
- Science and Technology Development Fund from Macau SAR [FDCT-0102/2019/A2, FDCT-0035/2019/AGJ, FDCT-0154/2019/A3, FDCT-0125/2018/A3]
- Research & Development Office at University of Macau [MYRG2017-00027-FST, MYRG2018-00003-IAPME, MYRG2017-00149-FST, MYRG2017-00089-FST]
Two-dimensional (2D) materials have recently attracted abundant interest as cost-effective surface-enhanced Raman scattering (SERS) substrates for precise molecular monitoring. However, the challenge of large-area substrate production with high stability and uniformity still imposes unavoidable barrier of 2D materials for practical applications. In this work, we show that large-scale MS2 (M = Mo, W) vertical nanosheets with mixed 1T/2H phases on metal foils as SERS substrates can be fabricated by a simple and low-cost route. We find that the detection limits of MoS2 and WS2 can be up to 5 x 10(-8) M for Rhodamine 6G (R6G), which are much lower than those of most semiconductor SERS substrates. Moreover, the recyclable and scalable substrates provide excellent uniformity and reproducibility on the whole substrates (3 x 4 cm(2)), and the Raman signals keep unchanged after 30 days. The excellent SERS performance is contributed by the high content of 1T phase and 1T-2H heterostructures that significantly improve the charge transfer process, and rich edges that enable sufficient interaction with the interested molecules. Our findings offer potential candidates for practical applications in the food security field and provide insight to design novel SERS substrates.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据