| 초록 |
Photosensitive and biologically applicable polymer brushes grafted onto the surface can offer the diverse applications such as surface modification, patterned functionalization by photolithography, and biomolecule immobilization. The surface of poly(tetrafluoroethylene) was activated by a 150 keV Ar ion to introduce peroxides, which initiated the grafting polymerization through thermal cleavage and radical generation. 2-(2-Diazo-3-oxo-butyryloxy)ethyl methacrylate was graft-polymerized on the surface of PTFE as the photosensitive polymer brush under various conditions. The polymer brush layer was patterned through deep UV irradiation to give carboxylic acid groups in the exposed region generated by Wolff rearrangement. The carboxylic acid groups were biotinylated to bind protein such as streptavidin. And then fluorescence images of dye-labeled protein patterns were observed by a confocal microscope. The surface property was characterized by using FT-IR, XPS, and contact angle analysis. |
