Adhesion AM_KPFM 3-hexylthiophene BoronNitride TransitionMetal conductive Film kelvin probe force microscopy Sphere LogAmplifier PVA HydroGel Chrome Potential Indent ThermalProperties MBE HBN pinpoint mode hard_disk HfO2 multi_layer plastic sputter FFM Polymer Collagen AdhesionForce Implant Phenanthrene TempControl SKPM LightEmiting H-BN silicon_carbide