India SrTiO3 Polyvinylidene Optoelectonics molecules MechanicalProperties Tin sulfide ThermalConductivity SiWafer Wildtype C_AFM AM-KPFM Phase HighAspect ForceVolumeMapping Piranha Barium_titanate HDD Mechanical&nanotechnology strontiu_titanate ForceDistanceSpectroscopy PMNPT Hair Friction PinpointPFM Permalloy Bmp IMT_Bucharest ScanningKelvinProbeMicroscopy Co/Cr/Pt hard_disk_media molecule self-assembly MoS2 UTEM