Wildtype P3HT align atomic_steps TappingMode Lift ShenYang SingleLayer Annealed lithography Silicon graphene_hybrid Led Cobalt Ferrite StyreneBeads PyroelectricDetector YttriaStabilizedZirconia C_AFM Sulfur OpticalElement Polyurethane NUS_Physics FM_SKPM Switching Monisha CntFilm aluminum_nitride polyvinyl acetate Sic Lateral_Force_Microscopy Reading amplitude_modulation optoelectronics 2-vinylpyridine