Phase-Engineered Transition Metal Dichalcogenides for Highly Efficient Surface-Enhanced Raman Scattering
Phase engineering of two-dimensional (2D) transition metal dichalcogenides (TMDs) is an attractive avenue to construct new surface-enhanced Raman scattering (SERS) substrates. Herein, 2D WS<sub>2</sub> and MoS<sub>2</sub> monolayers with high-purity distorted octahedral phase (1T') are prepared for highly sensitive SERS detection of analytes (e.g., rhodamine 6G, rhodamine B and crystal violet). 1T'-WS<sub>2</sub> and 1T'-MoS<sub>2</sub> monolayers show the detection limits of 8.28 × 10<sup>-12</sup> and 8.57 × 10<sup>-11</sup> M for rhodamine 6G, with the enhancement factors of 4.6 × 10<sup>8</sup> and 3.9 × 10<sup>7</sup>, respectively, which are comparable to noble-metal substrates, outperforming semiconducting 2H-W(Mo)S<sub>2</sub> monolayers and most of the reported non-noble-metal substrates. First-principles density functional theory calculations show that their Raman enhancement effect is mainly ascribed to highly efficient interfacial charge transfer between the 1T'-W(Mo)S<sub>2</sub> monolayers and analytes. Our study reveals that 2D TMDs with semimetallic 1T' phase are promising as next-generation SERS substrates.
Authors
- Hongzhi Cui (ORCID: https://orcid.org/0000-0002-2212-0295)
- Huacheng Fan
- Lianhui Wang (ORCID: https://orcid.org/0000-0001-9030-9172)
- Qianfeng Xia (ORCID: https://orcid.org/0000-0001-5521-5664)
- Zhuangchai Lai (ORCID: https://orcid.org/0000-0001-8743-6568)
- Zhenhai Wang (ORCID: https://orcid.org/0000-0001-6657-3897)
- Chi Shu (ORCID: https://orcid.org/0000-0003-1880-5627)
- Zhiwei Huang (ORCID: https://orcid.org/0000-0002-0104-9135)
- Bo Chen (ORCID: https://orcid.org/0000-0001-6743-9251)
- Hai Li (ORCID: https://orcid.org/0000-0002-9659-1153)
- Ying Zhang (ORCID: https://orcid.org/0000-0003-1481-9095)
- Wei Zheng (ORCID: https://orcid.org/0000-0002-9345-7397)
- Zhenyu Shi (ORCID: https://orcid.org/0000-0003-4259-4620)
- Zhimin Luo (ORCID: https://orcid.org/0000-0003-0851-2265)
- Fengping Liu
- Jia Wang (ORCID: https://orcid.org/0000-0002-2330-8505)
Institutions
- Fujian Normal University (CN)
- Nanjing Tech University (CN)
- Hong Kong Polytechnic University (HK)
- National University of Singapore (SG)
- City University of Hong Kong (HK)
- Nanjing University of Posts and Telecommunications (CN)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-11-04
- DOI
- https://doi.org/10.1021/acs.nanolett.4c03924
- Citations
- 16
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- National University of Singapore
- Ministry of Education - Singapore
- National Natural Science Foundation of China
- Government of Jiangsu Province
- Tsinghua University
- Hong Kong Polytechnic University
- Natural Science Foundation of Jiangsu Province
- Qinglan Project of Jiangsu Province of China
- National Medical Research Council