Sperm TCS Pattern OpticalElement DeflectionOptics PolyimideFilm PolymerPatterns Polyvinylidene Workfunction Typhimurium ItoGlass VerticalPFM Array OxideLayer Subhajjit PinpointPFM BismuthVanadate Polyimide LowDensityPolyethylene FrictionalForceMicroscopy PolyvinylideneFluoride Vanadate Ni-FeAlloy solar_cell domain_switching Styrene Step SICM PvdfBead ferromagnetic Glass hard_disk AEAPDES Metal cross section