Magnetically Actuated Micropatterns for Switchable Wettability

被引：80

作者：

Drotlef, Dirk-M. ^{[1
]}

Bluemler, Peter ^{[2
]}

Papadopoulos, Periklis ^{[1
]}

del Campo, Aranzazu ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 11期

关键词：

actuated patterns; magnetic responsive polymer; soft actuators; switchable wetting; switchable surfaces; magnetic elastomers; SUPERHYDROPHOBIC SURFACES; CONTACT ANGLES; ANISOTROPY; ADHESION; TRANSPARENCY; HYSTERESIS; PATTERNS; FORCES; DRY;

D O I：

10.1021/am5014776

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Arrays of actuated magnetic micropillars that can be tilted, twisted, and rotated in the presence of a magnetic field gradient were obtained. The type and extent of the movements are dependent on the distribution (isotropic, anisotropic) of the magnetizable particles inside the pillars and the strength and the direction of the magnetic field gradient. Independent motion of groups of pillars in the same or opposite directions or homogeneous motion of the whole pattern has been realized. Changing the pattern geometry causes changes in the roll-off angle (ROA) of water droplets on the surface. We show magnetically induced changes in the ROA and direction-dependent ROAs as a consequence of the anisotropy of tilted patterns. We also demonstrate transfer of microparticles between magnetically actuated neighboring pillars.

引用

页码：8702 / 8707

页数：6

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