ScanningKelvinProbeMicroscopy HanyangUniv Vac Grain ScanningIon-ConductanceMicroscopy SiWafer Polymer Titanate CarbonNanotube Vinylpyridine Jason Dr.JurekSadowski Formamidinium_lead_iodide EFM Tin disulfide Filter StyreneBeads CalciumHydroxyapatite Microchannel self-assembly Blood Pzt CHRYSALIS_INC chemical_compound lift_mode #Materials NUS SrO Imprint PrCurve biocompatible Tungsten_disulfide MetalCompound BismuthFerrite Pinpoint