Chungnam_National_University molecules Polyimide Optical Boron Polypropylene DNAProtein Collagen HOPG CrossSection TungstenDeposition PtfeFilter Permalloy Zhi NTU 2dMaterials silicon_oxide align HighAspect self-assembled_monolayer MeltingPoint Alkane Fe_film FuelCell Butterfly Sic PFM FFM I-VSpectroscopy Vacuum HardDisk margarine SKKU DataStorage Polystyrene