ring shape BTO Ananth AM-KPFM Pvdf TungstenThinFilmDeposition hydrocarbon MfmAmplitude OrganicSemiconductor optoelectronics Hexacontane INSP HBN Pores mfm_amplitude Semiconductor vertical_PFM Stiffness Vac Polystyrene domain_switching Spincast Lift Annealing FrictionalForce Indent Glass ThinFilm PhaseTransition light_emitting Array SrO Metal Dental Heat