Nanopipette-Based Probe Deciphering Nanoscale Charge Distribution of Graphene Layers Affecting Peptide Binding and Assembling.

ABSTRACT: Layered nanomaterials, such as graphite and MoS₂, have attracted much attention due to the amazing electrical and optical properties of their single layers, which are useful for nanoelectronics and biosensing devices. Revealing the chemical environments of graphene layers, e.g., surface charge, is important since it has a critical effect on local electron mobility and biomolecular binding. However, charge distributions from different layers in liquid, with nanoscale resolution, are rarely investigated. Here, we revealed charge distributions on graphite flakes with different layers by nanopipette-based ion conductance microscopy under varied electrolyte concentrations and bias voltage conditions. We demonstrated distinct charge distributions from ultrathin layers (TLs), few layer

SUBMITTER: Hu J 

PROVIDER: S-EPMC12489890 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature