期刊
ACS NANO
卷 14, 期 8, 页码 10313-10323出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c03801
关键词
particle manipulation; magnetic artificial cilia; directional microparticle transportation; adhesion and friction; rotating magnetic field
类别
资金
- China Scholarship Council [201506030055, 201606020112]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [833214]
- European Research Council (ERC) [833214] Funding Source: European Research Council (ERC)
Manipulation of particles in a controllable manner is highly desirable in many applications. Inspired by biological cilia, this article experimentally and numerically demonstrates a versatile particle transportation platform consisting of arrays of magnetic artificial cilia (MAC) actuated by a rotating magnet. By performing a tilted conical motion, the MAC are capable of transporting particles on their tips, along designated directions that can be fully controlled by the externally applied magnetic field, in both liquid and air, at high resolution (particle precision), with varying speeds and for a range of particle sizes. Moreover, the underlying mechanism of the controlled particle transportation is studied in depth by combining experiments with numerical simulations. The results show that the adhesion and friction between the particle and the cilia are essential ingredients of the mechanism underlying the multidirectional transportation. This work offers an advanced solution to controllably transport particles along designated paths in any direction over a surface, which has potential applications in diverse fields including lab-on-a-chip devices, in vitro biomedical sciences, and self-cleaning and antifouling.
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