optoelectronics ring shape HighAcpectRatio AM_KPFM norganic Phosphide Alkane PinPointMode Tapping SKPM atomic_steps Phthalocyanine HafniumDioxide SSRM Techcomp solar_cell self-assembly BCZT Yeditepe_University CeNSE_IISc Mfm Polyimide pulsed_laser_deposition Pore UnivCollegeLondon Reading Copper LightEmission TransitionMetal mfm_amplitude Cross-section Leakage Display SFAs temp_control