solar_cell Aluminium_Oxide membrane cross section SKPM Hafnia Gallium_Arsenide ScanningKelvinProbeMicroscopy pulsed_laser_deposition INSPParis Adhesion C60H122 Sperm ConductiveAFM Mosfet ShenYang ForceVolumeImage bias_mode LiNbO3 Vacuum SICM pinpoint mode nanomechanical Tungsten Ferroelectric Memory AlkaneFilm HexacontaneFilm Pzt Hafnium_dioxide optoelectronics temperature controller AFM ContactMode Chungnam_National_University small_scan