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...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 1.83×10^(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.展开更多
基金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)+1 种基金the Fundamental Research Funds for the Central Universities(Grant Nos.2242021k10009,2242021R20037,and 2242021R20035)the China Postdoctoral Science Foundation(Grant No.2018M632197).
文摘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 1.83×10^(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.
