Hydrophilic dots on hydrophobic nanopatterned surfaces as a flexible gas barrier.
The present study demonstrates a transparent polymeric gas barrier film mimicking the Namib Desert beetle's back. SiO(2) hydrophilic dots have been deposited on a nanopatterned hydrophobic surface. A nanopatterned surface was fabricated by UV-curable nanoimprinting techniques. The surface energies of the hydrophobic and hydrophilic domains were 7.29 and >73.12 mN/m, respectively. The characteristics of water vapor transfer from hydrophobic to hydrophilic regions due to difference of the attractive force at interfaces are shown to yield the enhanced barrier performance according to the Ca degradation measurements. This strategy is suitable for organic electronics, solar cells, and plastic optics applications requiring moisture-free properties with high transmission.
Choi
Jin Hwan
JH
Display and Nanosystem Laboratory, College of Engineering, Korea University, 5-1 Anam-Dong, Seongbuk-Gu, Seoul 136-701, Korea.
Kim
Young Min
YM
Park
Young Wook
YW
Park
Tae Hyun
TH
Dong
Ki Young
KY
Ju
Byeong Kwon
BK