LiftMode Electronics LiquidCrystal CntFilm CarbonNanotube TipBiasMode UnivOfMaryland Polyvinylidene_fluoride Sapphire ThermalDetectors #Materials BiVO4 chemical_compound tip_bias_mode Tapping Current DNA blended polymers MagneticForceMicroscopy Sphere Typhimurium Aluminum Wang Tape semifluorinated_alkanes alkanes SurfaceOxidation silicon_oxide Lattice Iron OpticalWaveguide self-assembled_monolayer Subhajjit Temasek_Lab Crystal