부산대학교 도서관

In this research, an initiator layer was developed developed using photoreaction between hydrocarbon network in polydopamine film and arylazide-based initiator. When arylazides is irradiated by UV light, it generates reactive nitrene groups which reacts quickly with hydrocarbons. First, a film was formed on the surface through polydopamine coating, a mimicry of mussel adhesive proteins, which can be coated regardless of the type of surface. Then perfluorophenylazide-based initiator (PBI) was spread on the film, and the surface was functionalized with PBI by UV irradiation. For simple photolithographic techniques, I introduced a photomask, which enabled the site-selective functionalization of the PBI on the surface. Introduction of the PBI on the surface was confirmed by X-ray photoelectron spectroscopy (XPS) analysis, and site-selective functionalization by time-of-flight secondary ion mass spectrometer (TOF-SIM) analysis. In addition, through surface-initiated polymerization (SIP), patterned polymer brush was formed on the surface site-selectively and confirmed by cell culture. Furthermore, polyethyleneimine (PEI) was co-deposited with dopamine to make the initiator film with higher density, and it was confirmed by XPS analysis of bromine of PBI. In other words, our initiator layer can be functionalized site-selectively with higher density on all types of surfaces.