polyvinyl acetate plastic Film Nanostructure Leakage P3HT Conductance single_layer KelvinProbeForceMicroscopy align high_resolution NiFe ScanningKelvinProbeMicroscopy doped domain_switching molecular_self_assembly HighAcpectRatio Ito BoronNitride Ram Litho piezoelectric force microscopy Polyimide #Materials Trench LowDensityPolyethylene Yttria_stabilized_Zirconia LithiumNiobate atomic_steps Cobalt Polydimethylsiloxane Battery HACrystal Sadowski NUS_Physics