Spontaneous movement of water droplets on patterned Cu and Al surfaces with wedge-shaped gradients

被引：94

作者：

Alheshibri, M. H. ^{[1
]}

Rogers, N. G. ^{[2
]}

Sommers, A. D. ^{[2
]}

Eid, K. F. ^{[1
]}

机构：

[1] Miami Univ, Dept Phys, Oxford, OH 45056 USA

[2] Miami Univ, Dept Mech & Mfg Engn, Oxford, OH 45056 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 17期

关键词：

TUBE HEAT-EXCHANGERS; RETENTION; BEHAVIOR;

D O I：

10.1063/1.4802926

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a simple technique for moving water droplets on a hydrophilic aluminum surface containing a hydrophobic copper background. A surface tension gradient due to a triangular-shaped wedge moves the droplets towards the end of the wedge which contains more Al surface area. Movement on both horizontal surfaces and surfaces oriented vertically against gravity has been observed. The mode of droplet motion was found to depend on the wedge angle, and the speed was found to depend on both the wedge angle and the droplet contact angles on the Al and Cu. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4802926]

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页数：4

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