Ptfe Terrace Phthalocyanine PtfeFilter PVA FM_SKPM Hole SurfaceChange Worcester_Polytechnic_Institute IVSpectroscopy Friction Electronics StrontiumTitanate OpticalModulator NusEce LithiumNiobate Tapping LifeScience atomic_steps Sphere EFM block_copolymer PtfeMembrane SrTiO3 self_healing Vortex AM_KPFM Alkane tip_bias_mode electrospinning small_scan ring shape Sidewall Biofilm EvatecAG