chemical_compound hetero_structure LMF Barium_titanate PDMS Bismuth UnivMaryland pinpoint mode Jason NUS_NNI_Nanocore Step Calcium Polymer Polyvinylidene_fluoride China IVSpectroscopy Implant neodymium_magnets ForceDistanceSpectroscopy Heat solar_cell ForceMapping 2d_materials Battery Laser GranadaUniv atomic_layer fluoroalkane KelvinProbeForceMicroscopy PhthalocyaninePraseodymium GaN NanoLithography TemperatureControllerAFM temp_control PVAP3HT