Pyroelectrically Driven Charge Transfer and its Advantages on SERS and Self‐Cleaning Property

Abstract The fabrication of reusable SERS substrates with sensitivity at the single‐molecule level remains challenging but promising. Herein, a composite surface‐enhanced Raman scattering (SERS) substrate is proposed that includes Ag nanoparticle (Ag NPs) /Graphene/BaTiO 3 (Ag/G/BTO) from a chemical enhancement perspective. The pyroelectric field generated by BaTiO 3 drives the charge transfer between the SERS substrate and molecules, achieving a significant improvement in the SERS performance and self‐cleaning properties. The SERS signals of rhodamine 6G (R6G) molecules are further amplified up to 70‐fold. Thus, the detection limit is reduced by three orders of magnitude in this study, reaching 10 −14 m after…

• NN
  National Natural Science Foundation of China

  Awards: 12104085, 12004226
• NS
  Natural Science Foundation of Shandong Province

  Award: ZR2021QA008