Presentation Information
[10a-E203-7]Evaluation of the Underlying Substrate Surface Dependence of Polar Molecule Adsorption on Graphene by Time-Resolved Surface Potential Measurements
〇(M1)Genki Fushio1, Ryo Nouchi1 (1.Osaka Metropol. Univ.)
Keywords:
Wetting transparency,Adsorption orientation,Electrostatic carrier doping
Contact-angle measurements using liquid droplets, commonly used to evaluate the wetting transparency of graphene, are affected by intermolecular interactions among the molecules constituting the droplets. In this presentation, we report the results of time-resolved surface-potential measurements of the adsorption behavior of polar gas-phase molecules, performed to minimize such interactions and thereby probe molecule–surface interactions more directly. The direction of the work-function change upon molecular exposure on graphene supported on substrates with different polarities was found to depend on the polarity of the underlying substrate, suggesting the transparency of the underlying surface properties through graphene.