4.8 Article

Amphibious Transport of Fluids and Solids by Soft Magnetic Carpets

期刊

ADVANCED SCIENCE
卷 8, 期 21, 页码 -

出版社

WILEY
DOI: 10.1002/advs.202102510

关键词

artificial cilia; fluid dynamics; magnetic fields; self assembly; soft robots

资金

  1. Swiss National Science Foundation through the National Centre of Competence in Research Bio-Inspired Materials [51NF40_182881]
  2. NWO [740.018.013]
  3. EU-FET [766972]
  4. United States Department of Agriculture (USDA-NIFA AFRI) [2020-67017-30776, 2020-67015-32330]

向作者/读者索取更多资源

This study explores a method for controlling micromanipulation using active and adaptive materials, showing that soft magnetic carpets can be effectively used for transportation and their effects can be easily controlled through magnetic fields.
One of the major challenges in modern robotics is controlling micromanipulation by active and adaptive materials. In the respiratory system, such actuation enables pathogen clearance by means of motile cilia. While various types of artificial cilia have been engineered recently, they often involve complex manufacturing protocols and focus on transporting liquids only. Here, soft magnetic carpets are created via an easy self-assembly route based on the Rosensweig instability. These carpets can transport not only liquids but also solid objects that are larger and heavier than the artificial cilia, using a crowd-surfing effect.This amphibious transportation is locally and reconfigurably tunable by simple micromagnets or advanced programmable magnetic fields with a high degree of spatial resolution. Two surprising cargo reversal effects are identified and modeled due to collective ciliary motion and nontrivial elastohydrodynamics. While the active carpets are generally applicable to integrated control systems for transport, mixing, and sorting, these effects can also be exploited for microfluidic viscosimetry and elastometry.

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