Ratchet-induced anisotropic behavior of superparamagnetic microdroplet

被引：56

作者：

Zhang, Jihua ^{[1
,2
,3
]}

Cheng, Zhongjun ^{[2
]}

Zheng, Yongmei ^{[1
]}

Jiang, Lei ^{[1
,2
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Sch Chem & Environm, Beijing 100191, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China

[3] Aerosp Res Inst Mat & Technol, Beijing 100076, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 14期

基金：

美国国家科学基金会;

关键词：

drops; magnetic anisotropy; magnetic fluids; magnetic particles; nanoparticles; superparamagnetism; wetting; SUPERHYDROPHOBIC SURFACE; THERMAL-GRADIENTS; DROPLETS; LIQUID; SEPARATION; MOTIONS;

D O I：

10.1063/1.3103250

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Microscale ratchet structured surfaces were coated with nanoparticles, which resulted in anisotropic behavior of superparamagnetic microdroplet by magnetic field actuation. This ratchet structure enables superparamagnetic microdroplets to generate the anisotropic behavior through the alternative external magnetic field. A tuning behavior was revealed by changing the height of ratchet, the numbers of superparamagnetic nanoparticles, and the size of microdroplets. It is significant to understand the wetting properties on superhydrophobic surfaces with anisotropic structure.

引用

页数：3

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