SrTiO3 ScanningKelvinProbeMicroscopy Etch BlockCopolymer Organic Heating FM_KPFM Sio2 BoronNitride #Materials strontiu_titanate Array PyroelectricDetector FailureAnlaysis SmallScan FrequencyModulation Nickel DNAProtein Potential Holes ScanningTunnelingMicroscopy temp Collagen LiftHeight plastic Vortex StrontiumTitanate Copper GranadaUniv Ptfe Permalloy semifluorinated_alkane PFM Force-distance GaAs