HardDiskMedia IMT_Bucharest NUS_Physics frequency_modulation Memory Tin sulfide PtfeFilter PolyStylene graphene_hybrid CrossSection PetruPoni_Institute phase_change ElectroChemical Chrome Vacuum F14H20 hydrocarbon Permalloy PDMS Anneal DeoxyribonucleicAcid Cross-section Collagen domain_switching Yeditepe_University #Materials Reading SmalScan Formamidinium_lead_iodide Layer Wang kelvin probe force microscopy plastic Tape SKKU