SmalScan GaAs Polyaniline PS_LDPE Imprint WS2 temperature controller AFM ULCA NCM FloppyDisk DeflectionOptics Heat Graphite Sadowski Topography SmallScan Vacuum FM_KPFM Corrosion Cell Stiffness Chungnam_National_University Calcite Polydimethylsiloxane InorganicCompound HanyangUniv mechanical property Oxidation Ferroelectric Sidewall FrictionalForce Crystal DataStorage UnivMaryland Sio2