Holes TiO2 Logo FrequencyModulation Tin disulfide kelvin probe force microscopy AEAPDES FM-KPFM FuelCell HighResolution SiliconOxide Bacteria Solution CeramicCapacitor ForceDistanceSpectroscopy Gold CrossSection pinpoint mode Tungsten_disulfide Temasek_Lab CVD Resistance Spain Friction Polydimethylsiloxane OpticalElement ShenYang Christmas Pinpoint LiquidCell SoftSample Bacterium LiftMode membrane semifluorinated alkane