NUS Ananth Worcester_Polytechnic_Institute Layer Array AM-KPFM Roughness FAPbI3 hard_disk_media MeltingPoint Wonseok HexagonalBN doped H-BN Styrene AEAPDES Optoelectronic ForceVolumeImage LogAmplifier ElectroDeposition Display CNT Chemical Vapor Deposition TungstenDeposition Al2O3 Pvdf SrTiO3 Holes ThermalProperties temperature controller AFM SingleLayer Piezoelectric SKKU Lift Pinpoint PFM