GaP Polyurethane high_resolution heterojunctions LateralForceMicroscopy OrganicCompound PANI FM_KPFM SurfaceOxidation EvatecAG DataStorage FrequencyModulation Granada Implant self-assembled_monolayer Bismuth Sapphire Composite Scratch Typhimurium bias_mode FailureAnalysis PtfeMembrane cooling PyroelectricDetector rubber TransitionMetal MfmPhase Alkane SingleLayer Aggregated_molecules PVA membrane University_of_Regensburg CP-AFM