tip_bias_mode Silicon Gallium_Arsenide IndiumTinOxide HfO2 Terrace kelvin probe force microscopy Monisha AAO PFM SiliconeOxide Reduction Photovoltaics Copolymer Zagreb MoirePattern Jason UTEM Conduct mechanical property Defects Microchannel Butterfly BFO ContactModeDot Mosfet Annealed Cobalt University_of_Regensburg PS_LDPE ring shape Sulfur epitaxy Inorganic DOE