AM_SKPM tip_bias_mode Morphology alkanes Monisha Organic PetruPoni_Institute LateralPFM Multiferroic_materials Semiconductor Vanadate Bismuth cannabidiol fluoroalkane Hexylthiophene VinylAlcohol phase_change VortexCore IISCBangalore Calcite conductive Metal Hexatriacontane PVAC PolyimideFilm ReflexLens ScanningThermalMicroscopy ScanningKelvinProbeMicroscopy plastic silicon_carbide I-VSpectroscopy AdhesionForce Graphene Worcester_Polytechnic_Institute solar_cell