Protein Tungsten_disulfide BiasMode PtfeMembrane DomainSwitching ULCA ForceMapping dielectric trench Gallium_Arsenide Fendb Heat Change Alkane EFM temperature controller AFM HOPG electrospinning Celebration PVAC KelvinProbeForceMicroscopy Polarization alkanes BiFeO3 EvatecAG Praseodymium PMNPT Formamidinium_lead_iodide ThermalDetectors Wildtype NUS ChemicalCompound PpLdpe organic_polymer ContactMode NUS_Physics