부산대학교 도서관

We report on a one-step progressive modification of imprinted nanopatterns for the induction of a structural and physicochemical gradient in a single chip and its application for microbial adhesion control. Imprinted nanopatterns could be easily tapered off by gradient-field-plasma, nonuniform magnetic field plasma, thermal gradient methods. It was also demonstrated that modified patterns could be usable as additional stamp for pattern reversal. Furthermore, it was proven that this gradual modification method is applicable to various imprint patterns of different structures and resist materials. Wettability of the pattern was also gradually modified to have a hydrophobic to hydrophilic at the end to end of the substrate by gradient-field-plasma method. This wettability gradient was enhanced by alternating plasma method that perform the same total reaction time in repetitive short times. This wettability gradient could be applicable to the automatic droplet locomotion even trace up the inclined surface. Finally, microbial adhesion property was examined that cell attachment preference according to the wettability, and it was easily verified by single pattern having property gradient. This property could be applicable to form an anti-biofouling surface, or region-selective sample collection system.