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Title: 1T'-transition metal dichalcogenide monolayers stabilized on 4H-Au nanowires for ultrasensitive SERS detection

Journal Article · · Nature Materials
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  1. City Univ. of Hong Kong (Hong Kong)
  2. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics
  3. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Institute of Microsystem and Information Technology
  4. Hong Kong Polytechnic University, Hong Kong (China)
  5. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Institute of Applied Physics and Shanghai Advanced Research Institute
  6. Nanyang Technological Univ. (Singapore)
  7. The Chinese University of Hong Kong, Hong Kong (China)
  8. Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  9. Tsinghua Univ., Beijing (China)
  10. Xiamen University (China)
  11. Chinese Academy of Sciences (CAS), Shanghai (China). Shanghai Institute of Microsystem and Information Technology; Chinese Academy of Sciences (CAS), Shenzhen (China). Shenzhen Institute of Advanced Technology

Unconventional 1T'-phase transition metal dichalcogenides (TMDs) have aroused tremendous research interest due to their unique phase-dependent physicochemical properties and applications. However, due to the metastable nature of 1T'-TMDs, the controlled synthesis of 1T'-TMD monolayers (MLs) with high phase purity and stability still remains a challenge. Here we report that 4H-Au nanowires (NWs), when used as templates, can induce the quasi-epitaxial growth of high-phase-purity and stable 1T'-TMD MLs, including WS2, WSe2, MoS2 and MoSe2, via a facile and rapid wet-chemical method. The as-synthesized 4H-Au@1T'-TMD core–shell NWs can be used for ultrasensitive surface-enhanced Raman scattering (SERS) detection. For instance, the 4H-Au@1T'-WS2 NWs have achieved attomole-level SERS detections of Rhodamine 6G and a variety of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike proteins. Finally, this work provides insights into the preparation of high-phase-purity and stable 1T'-TMD MLs on metal substrates or templates, showing great potential in various promising applications.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
2432564
Report Number(s):
BNL--225942-2024-JAAM
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 10 Vol. 23; ISSN 1476-1122
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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