NusEce Semiconductor pinpoint mode Magnetic Phthalocyanine OrganicSemiconductor Conductive AFM KevlarFiber HardDiskMedia Writing Boron Iron CaMnO3 SKKU VerticalPFM PVA LateralForceMicroscopy frequency_modulation StyreneBeads HBN Ananth I-VSpectroscopy MoirePattern HOPG Monisha Permalloy Sulfur Ito Collagen IndiumTinOxide LiIonBattery Ram flakes lithography Trench