UnivOfMaryland nanomechanical Foil ConductingPolymer PyroelectricDetector TappingMode SPMLabs Piezoresponse StainlessSteel Heat plastic Wang Hafnium_dioxide GalliumPhosphide CrossSection Solar Scanning_Thermal_Microscopy WPlug NUS_NNI_Nanocore Semiconductor Patterns domain_switching SiliconeOxide Perovskite EFMAmplitude PiezoelectricForceMicroscopy molecular_beam HighAcpectRatio HBN LeakageCurrent block_copolymer Boundary LogAmplifier graphene_hybrid lithography