Ferroelectrically modulate the Fermi level of graphene oxide to enhance SERS response

Surface-enhanced Raman scattering (SERS) substrates based on chemical mechanism (CM) have received widespread attentions for the stable and repeatable signal output due to their excellent chemical stability, uniform molecular adsorption and controllable molecular orientation. However, it remains huge challenges to achieve the optimal SERS signal for diverse molecules with different band structures on the same substrate. Herein, we demonstrate a graphene oxide (GO) energy band regulation strategy through ferroelectric polarization to facilitate the charge transfer process for improving SERS activity. The Fermi level (Ef) of GO can be flexibly manipulated by adjusting the ferroelectric polarization direction or…

• NN
  National Natural Science Foundation of China

  Awards: 12174229, 12004226, 11974222, 11904214
• CP
  China Postdoctoral Science Foundation

  Award: 2019M662423
• NS
  Natural Science Foundation of Shandong Province

  Awards: 2019KJJ017, ZR2020QA075, ZR2022YQ02