mfm_amplitude PVA Strontium EFM ThermalConductivity epitaxy Domain Solar medical Film Sperm MoS2 Heat BTO MBE UTEM Growth PS_LDPE Tungsten Worcester_Polytechnic_Institute CrAu Vortex Mobile ContactModeDot AdhesionEnergy INSPParis ScanningThermalMicroscopy Pinpoint PFM AtomicLayer Aluminum Graphene MembraneFilter Sio2 semifluorinated_alkanes molecules