hetero_structure SrTiO3 Regensburg Polyvinylidene_fluoride silicon_oxide HexagonalBN LDPE Pinpoint PFM ForceMapping Treatment SiliconCrystal Logo DNA ScratchMode nanobar Lateral Piezo PpLdpe Vacuum ScanningThermalMicroscopy Neodymium CNT Silicon optoelectronics FM_KPFM Tin disulfide HardDiskMedia Singapore Pzt TemperatureControlledAFM Alkane PyroelectricDetector GaP Chloroform pulsed_laser_deposition