kelvin probe force microscopy PyroelectricDetector Leakage CeNSE_IISc Wildtype LiftHeight LDPE Display FuelCell Polyvinylidene_fluoride CuSubstrate NanoLithography UnivOfMaryland Calcite ImideMonomer KevlarFiber UnivCollegeLondon FAPbI3 C60H122 InsulatorFilm Composition Copolymer SingleCrystal cross section Electronics SelfAssembly PolymerBlend molecular_self_assembly Electrode HighResolution SAM small_scan light_emission StrontiuTitanate nanomechanical