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Mixed-dimensional van der Waals heterojunction-enhanced Raman scattering 被引量:1
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作者 Mingze Li yunjia wei +3 位作者 Xingce Fan Guoqun Li Qi Hao Teng Qiu 《Nano Research》 SCIE EI CSCD 2022年第1期637-643,共7页
Van der Waals heterojunctions(vdWHs)provide an excellent material system for the research of heterojunction-enhanced Raman scattering(HERS)due to their complexity and diversity.However,the traditional two-dimensional ... Van der Waals heterojunctions(vdWHs)provide an excellent material system for the research of heterojunction-enhanced Raman scattering(HERS)due to their complexity and diversity.However,the traditional two-dimensional vdWHs are not conducive to the full utilization of near-field light due to the limitation of single dimension.Herein,we fabricate T-shaped mixed-dimensional SnSe_(2)/ReS_(2) vdWHs via chemical vapor deposition and wetting transfer method,and demonstrate that the mixed-dimensional vdWHs can be used as ultrasensitive HERS chips based on the effective photo-induced charge transfer.Besides,the radiative energy transfer effect enhanced by near-field light further magnifies the HERS signals,improving the detection limit of rhodamine 6G(R6G)to femtomolar level.Furthermore,we demonstrate that the ultrasensitive screening of crystal violet in multicomponent solutions adsorbed on SnSe_(2)/ReS_(2) vdWHs can be achieved by adjusting the laser wavelength,which has not been achieved by noble metal materials.This work provides new insights into the mixed-dimensional vdWHs and demonstrates the great application potential of T-shaped heterojunctions. 展开更多
关键词 van der Waals heterojunction enhanced Raman scattering photo-induced charge transfer radiative energy transfer Raman spectroscopic screening
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