aluminum_nitride TransitionMetal Hysteresys NUS Nanostructure Insulator multi_layer Piezo heterojunctions Scanning_Thermal_Microscopy EPFL PFM PVAP3HT Alloy LogAmplifier University_of_Regensburg IIT-chennai PiezoelectricForceMicroscopy Pzt Sidewall TipBiasMode Hafnium_dioxide hydrocarbon IVSpectroscopy Materials Modulus Scratch Reduction Layer Conductance Non-ContactMode GaAs molecular_self_assembly Polyvinylidene_fluoride fe_nd_b