PhaseImaging Fluoride gallium_nitride SThM Foil Copper Spincast organic_polymer Temasek_Lab Metal SingleLayer Yeditepe Resistance Lattice Polystyrene Hydroxyapatite LightEmiting Hexatriacontane Electrical&Electronics Optical neodymium_magnets Cross-section Carbon Hexacontane Styrene atomic_layer NiFe Photovoltaics Conductivity oxide_layer FrequencyModulation CuSubstrate AEAPDES kelvin probe force microscopy Ecoli