NtuEee Piezo 2d_materials KAIST Fiber StyreneBeads Tin sulfide LiquidCell oxide_layer Sulfur LateralPFM Device ElectroChemical Cobalt-dopedIronOxide ConductingPolymer Sadowski Pzt Organic Bacteria BFO PolyStylene PatternedSapphireSubstrat PolyimideFilm KelvinProbeForceMicroscopy OpticalWaveguide self-assembled_monolayer thermal_conductivity MfmPhase SiliconOxide FM-KPFM Aggregated_molecules Barium_titanate CrossSection DOE SiliconeOxide