Processing math: 100%

Surface-Enhanced Raman Scattering of Hydrogen Plasma-Treated Few-Layer MoTe2

Funds: Supported by the National Natural Science Foundation of China (Grant Nos. 91963130, 11704068, 61927808, and 61705106), the National Key R&D Program of China (Grant No. 2019YFA0308000), the Fundamental Research Funds for the Central Universities (Grant Nos. 2242021k10009, 2242021R20037, and 2242021R20035), and the China Postdoctoral Science Foundation (Grant No. 2018M632197).
  • Received Date: April 08, 2021
  • Published Date: June 30, 2021
  • Two-dimensional surface-enhanced Raman scattering (SERS) substrates have drawn intense attention due to their excellent spectral reproducibility, high uniformity and perfect anti-interference ability. However, the inferior detection sensitivity and low enhancement have limited the practical application of two-dimensional SERS substrates. To address this issue, we propose that the interaction between the MoTe2 substrate and the analyte rhodamine 6G molecules could be remarkably enhanced by the introduced p-doping effect and lattice distortion of MoTe2 via hydrogen plasma treatment. After the treatment, the SERS is greatly improved, the enhancement factor of probe molecules reaches 1.83×106 as well as the limit of detection concentration reaches 1013 M. This method is anticipated to afford new enhancement probability for other 2D materials, even non-metal oxide semiconductor SERS substrates.
  • Article Text

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