HexagonalBoronNitride DataStorage FrictionalForceMicroscopy KelvinProbeForceMicroscopy University_of_Regensburg norganic GaN CaMnO3 Inorganic Zhi BlockCopolymer BreastCancerCell TransitionMetal MolecularSelfAssembly PS_LDPE PiezoelectricForceMicroscopy Tapping BariumTitanate single_layer FM_KPFM PatternedSapphireSubstrat LiNbO3 Mechanical&nanotechnology OpticalElement cross section Piezoresponse SKKU PVAP3HT temperature_control VerticalPFM fifber DOE Fluoride phase_change silicon_oxide