P3HT optoelectronics Bio PVAP3HT Conductive AFM temp_control PANI FM-KPFM 2d_materials OrganicCompound Edwin Fujian Mechanical Ceramics Ferroelectric GaAs polymeric_arrays Led CarbonNanotube Indent Ram mono_layer non_contact #Materials cross section BiVO4 TempControl Workfunction LiquidCrystal ThermalConductivity Sadowski Polytetrafluoroethylene Glass CP-AFM ScanningTunnelingMicroscopy