Amphibious Transport of Fluids and Solids by Soft Magnetic Carpets

Demirörs A. F., Aykut S., Ganzeboom S., Meier Y. A., Hardeman R., de Graaf J., ...More

ADVANCED SCIENCE, vol.8, no.21, 2021 (SCI-Expanded) identifier identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 21
  • Publication Date: 2021
  • Doi Number: 10.1002/advs.202102510
  • Journal Name: ADVANCED SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Compendex, INSPEC, Directory of Open Access Journals
  • Keywords: artificial cilia, fluid dynamics, magnetic fields, self assembly, soft robots, ARTIFICIAL CILIA, FABRICATION, PROPULSION, DESIGN
  • Istanbul Technical University Affiliated: Yes


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.