TY - JOUR
T1 - Zipping-Depinning
T2 - Dissolution of Droplets on Micropatterned Concentric Rings
AU - Encarnación Escobar, José M.
AU - Dietrich, Erik
AU - Arscott, Steve
AU - Zandvliet, Harold J.W.
AU - Zhang, Xuehua
AU - Lohse, Detlef
N1 - ACS deal
PY - 2018/5/15
Y1 - 2018/5/15
N2 - The control of the surface wettability is of great interest for technological applications as well as for the fundamental understanding of surface phenomena. In this article, we describe the dissolution behavior of droplets wetting a micropatterned surface consisting of smooth concentric circular grooves. In the experiments, a droplet of alcohol (1-pentanol) is placed onto water-immersed micropatterns. When the drops dissolve, the dynamics of the receding contact line occurs in two different modes. In addition to the stick-jump mode with jumps from one ring to the next inner one, our study reveals a second dissolution mode, which we refer to as zipping-depinning. The velocity of the zipping-depinning fronts is governed by the dissolution rate. At the early stage of the droplet dissolution, our experimental results are in good agreement with the theoretical predictions by Debuisson et al. [ Appl. Phys. Lett. 2011, 99, 184101 ]. With an extended model, we can accurately describe the dissolution dynamics in both stick-jump and zipping-depinning modes.
AB - The control of the surface wettability is of great interest for technological applications as well as for the fundamental understanding of surface phenomena. In this article, we describe the dissolution behavior of droplets wetting a micropatterned surface consisting of smooth concentric circular grooves. In the experiments, a droplet of alcohol (1-pentanol) is placed onto water-immersed micropatterns. When the drops dissolve, the dynamics of the receding contact line occurs in two different modes. In addition to the stick-jump mode with jumps from one ring to the next inner one, our study reveals a second dissolution mode, which we refer to as zipping-depinning. The velocity of the zipping-depinning fronts is governed by the dissolution rate. At the early stage of the droplet dissolution, our experimental results are in good agreement with the theoretical predictions by Debuisson et al. [ Appl. Phys. Lett. 2011, 99, 184101 ]. With an extended model, we can accurately describe the dissolution dynamics in both stick-jump and zipping-depinning modes.
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85046125114&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.8b00256
DO - 10.1021/acs.langmuir.8b00256
M3 - Article
AN - SCOPUS:85046125114
SN - 0743-7463
VL - 34
SP - 5396
EP - 5402
JO - Langmuir
JF - Langmuir
IS - 19
ER -