Plasma-induced enhancement of light-matter interaction on graphene-MoS2 heterostructure for sensitive and metal-free SERS sensing (IMAGE)
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The vertical stacking of graphene and MoS₂ forms a van der Waals heterostructure, leveraging synergistic interlayer coupling to increase electron density and facilitate efficient charge transfer at the interface. The plasma treatment modifies the graphene surface by introducing structural defects and oxygen-containing groups, significantly improving charge transfer and light absorption efficiency. This combined approach achieves molecular detection limits comparable to traditional metal-based SERS sensors while offering advantages such as lower cost, better reproducibility, and substrate reusability. This advancement opens new possibilities for sensitive environmental monitoring and biomedical diagnostics.
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NANO RESEARCH, Tsinghua University Press
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