TY  - JOUR
A1  - Hiltl, Stephanie
A1  - Böker, Alexander
T1  - Wetting Phenomena on (Gradient) Wrinkle Substrates
T2  - Langmuir
N2  - We characterize the wetting behavior of nano structured wrinkle and gradient wrinkle substrates. Different contact angles on both sides of a water droplet after deposition on a gradient sample induce the self-propelled motion of the liquid toward smaller wrinkle dimensions. The droplet motion is self-limited by the contact angles balancing out. Because of the correlation between droplet motion and contact angles, we investigate the wetting behavior of wrinkle substrates with constant dimensions (wavelengths of 400-1200 nm). Contact angles of water droplets on those substrates increase with increasing dimensions of the underlying substrate. The results are independent of the two measurement directions, parallel and perpendicular to the longitudinal axis of the nanostructure. The presented findings may be considered for designing microfluidic or related devices and initiate ideas for the development of further wrinkle applications.
Y1  - 2016
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/44973
SN  - 0743-7463
VL  - 32
SP  - 8882
EP  - 8888
PB  - American Chemical Society
CY  - Washington
ER  -