Ultrafast charge transfer in mixed-dimensional WO_3-x nanowire/WSe₂ heterostructures for attomolar-level molecular sensing.

ABSTRACT: Developing efficient noble-metal-free surface-enhanced Raman scattering (SERS) substrates and unveiling the underlying mechanism is crucial for ultrasensitive molecular sensing. Herein, we report a facile synthesis of mixed-dimensional heterostructures via oxygen plasma treatments of two-dimensional (2D) materials. As a proof-of-concept, 1D/2D WO_3-x/WSe₂ heterostructures with good controllability and reproducibility are synthesized, in which 1D WO_3-x nanowire patterns are laterally arranged along the three-fold symmetric directions of 2D WSe₂. The WO_3-x/WSe₂ heterostructures exhibited high molecular sensitivity, with a limit of detection of 5 × 10^-18M and an enhancement factor of 5.0 × 10¹¹ for methyle

SUBMITTER: Lv Q 

PROVIDER: S-EPMC10175504 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature