Subhajjit EPFL ElectrostaticForceMicroscopy nanobar Polyethylene Boundary NiFe Change Roughness Nanofiber Phosphide Zhi Step Dimethicone PolycrystallineFerroelectricBCZT HardDiskMedia INSP Hair Ucl ito_film LeakageCurrent HydroGel Sadowski Aggregated_molecules Gallium_Arsenide Switching DLaTGS HumanHair HOPG temperature_control Conducting Wang Implant PyroelectricDetector self_healing