silicon_oxide fluoroalkane KAIST dielectric trench Filter contact Materials Heat ElectroDeposition GalliumPhosphide tip_bias_mode LightEmiting SetpointMode molecular_beam LeakageCurrent Pvdf Force-distance Polarization SSRM phase_change MESA structure Photovoltaics Chungnam_National_University MoirePattern HexagonalBN PhaseImaging LFM I-VSpectroscopy HBN LateralForceMicroscopy semifluorinated_alkanes Fe_film Blend 2dMaterials Alloy