thermoplastic_elastomers ScanningTunnelingMicroscopy SicMosfet MultiferroicMaterials Gold chemical_compound cross section fluorocarbon TemperatureControlledAFM Polyvinylidene_fluoride temp F14H20 IVSpectroscopy Nanostructure SingleCrystal Hole NanoLithography Mechinical CBD Heat vertical_PFM pinpoint mode UnivOfMaryland temperature_control China Jason PetruPoni Deposition aluminum_nitride Polypropylene FFM Styrene mfm_amplitude Polarization Solution