Semiconductor Oxide temperature_control Praseodymium molecules Ptfe Defect PiezoelectricForceMicroscopy PhaseImaging semifluorinated_alkane ConductiveAFM cooling Vacuum PtfeFilter InorganicCompound OpticalModulator Mechanical University_of_Regensburg Gong Friction MagneticPhase DIWafer HardDisk Tin disulfide P3HT Wang CalciumHydroxide Spincast PolyStylene Defects GalliumPhosphide LateralForce PhaseChange hetero_structure Sic