Conductance DLaTGS ScanningSpreadingResistanceMicroscopy Fet MfmAmplitude PinpointPFM PatternedSapphireSubstrat LightEmission PVA PinPointMode BoronNitride UnivCollegeLondon Korea kelvin probe force microscopy MolybdenumDisulfide ElectroChemical Conductive AFM P3HT BaTiO3 StrontiuTitanate India Pzt PpLdpe SurfaceOxidation CompactDisk DIWafer TPU Gallium_Arsenide Plug CHRYSALIS_INC EFMAmplitude solar_cell Reading PolyimideFilm Indium_tin_oxide