| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Surface-Enhanced Raman Scattering of Hydrogen Plasma-Treated Few-Layer MoTe$_{2}$ |
| Xiao-Xue Jing1, Da-Qing Li2, Yong Zhang1, Xiang-Yu Hou1, Jie Jiang1, Xing-Ce Fan1, Meng-Chen Wang1, Shao-Peng Feng1, Yuan-fang Yu , Jun-Peng Lu1, Zhen-Liang Hu1*, and Zhen-Hua Ni1* |
1Department of Physics, Southeast University, Nanjing 211189, China
2Department of Electronic Engineering, Jiangnan University, Wuxi 214122, China
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| Cite this article: |
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Xiao-Xue Jing, Da-Qing Li, Yong Zhang et al 2021 Chin. Phys. Lett. 38 074203 |
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Abstract 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 MoTe$_{2}$ substrate and the analyte rhodamine 6G molecules could be remarkably enhanced by the introduced p-doping effect and lattice distortion of MoTe$_{2}$ via hydrogen plasma treatment. After the treatment, the SERS is greatly improved, the enhancement factor of probe molecules reaches $1.83 \times 10^{6}$ as well as the limit of detection concentration reaches $10^{-13}$ M. This method is anticipated to afford new enhancement probability for other 2D materials, even non-metal oxide semiconductor SERS substrates.
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Received: 09 April 2021
Published: 05 July 2021
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| PACS: |
42.65.Dr
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(Stimulated Raman scattering; CARS)
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52.75.Di
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(Ion and plasma propulsion)
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61.05.js
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(X-ray photoelectron diffraction)
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| Fund: 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). |
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