kelvin probe force microscopy ContactModeDot alkanes HexagonalBN Optoelectonics AnodizedAluminumOxide Monisha MetalCompound CntFilm ScanningThermalMicroscopy BoronNitride BiVO4 Carbon Thermoplastic_polyurethane Change Tungsten DOE DIWafer Filter SiliconeOxide #Materials neodymium_magnets Piezo Techcomp H-BN AlkaneFilm PetruPoni oxide_layer BismuthVanadate Display WS2 Composite SrTiO3 biocompatible dielectric trench