Results 61 to 70 of about 2,399,695 (205)

Magnetically powered metachronal waves induce locomotion in self-assemblies [PDF]

Communications Physics, 2020
AbstractWhen tiny soft ferromagnetic particles are placed along a liquid interface and exposed to a vertical magnetic field, the balance between capillary attraction and magnetic repulsion leads to self-organization into well-defined patterns. Here, we demonstrate experimentally that precessing magnetic fields induce metachronal waves on the periphery ...
Galien Grosjean, Galien Grosjean, Nicolas Vandewalle, Ylona Collard   +3 more
openaire   +4 more sources

A Synthetic Minimal Beating Axoneme

Small, Volume 18, Issue 32, August 11, 2022., 2022
Cilia and flagella are cellular appendages that beat rhythmically to transport fluids and propel living organisms. The authors report the reconstitution of a synthetic cilium from the bottom up using biological building blocks, namely microtubules and axonemal dynein.
Isabella Guido, Andrej Vilfan, Kenta Ishibashi, Hitoshi Sakakibara, Misaki Shiraga, Eberhard Bodenschatz, Ramin Golestanian, Kazuhiro Oiwa   +7 more
wiley   +1 more source

Recent Progress in Active Mechanical Metamaterials and Construction Principles

Advanced Science, Volume 9, Issue 1, January 5, 2022., 2022
Active mechanical metamaterials (AMMs) are newly emerged metamaterials in recent decades. Due to the elaborately designed internal micro‐structures and stimuli‐responsive characteristics, AMMs have both the advantages of unusual mechanical properties of mechanical metamaterials and the smart actuation functions of active materials.
Jixiang Qi, Zihao Chen, Peng Jiang, Wenxia Hu, Yonghuan Wang, Zeang Zhao, Xiaofei Cao, Shushan Zhang, Ran Tao, Ying Li, Daining Fang   +10 more
wiley   +1 more source

Amphibious Transport of Fluids and Solids by Soft Magnetic Carpets

Advanced Science, Volume 8, Issue 21, November 3, 2021., 2021
Artificial magnetic cilia on a soft carpet can be made via a self‐assembly route based on the Rosensweig instability. Soft carpets can transport both liquids and 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
Ahmet F. Demirörs, Sümeyye Aykut, Sophia Ganzeboom, Yuki A. Meier, Robert Hardeman, Joost de Graaf, Arnold J. T. M. Mathijssen, Erik Poloni, Julia A. Carpenter, Caner Ünlü, Daniel Zenhäusern   +10 more
wiley   +1 more source

Fluid circulation driven by collectively organized metachronal waves in swimming T. aceiti nematodes

Physical Review E, 2022
Recent experiments have shown that the nematode {\it T. aceti} can assemble into collectively undulating groups at the edge of fluid drops. This coordinated state consists of metachronal waves and drives fluid circulation inside the drop. We find that the circulation velocity is about 2 mm/s and nearly half the speed of the metachronal wave. We develop
Alice C. Quillen, A. Peshkov, Brato Chakrabarti, Nathan Skerrett, Sonia McGaffigan, Rebeca Zapiach   +5 more
openalex   +5 more sources

Synchronization and metachronal waves of elastic cilia caused by unsteady viscous flow

Physical Review Research
Hydrodynamic coordination of cilia is ubiquitous in biology. It is commonly modeled using the steady Stokes equations. The flow around ciliated cells, however, exhibits finite-time vorticity diffusion, requiring a dynamical description. We present a model of elastic cilia coupled by unsteady viscous flow in the bulk fluid.
Albert von Kenne, Sonja Schmelter, Holger Stark, Markus Bär   +3 more
openalex   +3 more sources

A multiscale biophysical model gives quantized metachronal waves in a lattice of beating cilia

Proceedings of the National Academy of Sciences, 2022
Significance Understanding the emergence and properties of metachronal waves (MWs) in ciliary arrays is a multiscale problem central to developmental biology, transport phenomena, and nonequilibrium physics, and with potential biomedical applications. For 1D lattices of cilia, we report key mechanisms that lead to the robust emergence of MWs.
Brato Chakrabarti, Sebastian Fürthauer, Michael J. Shelley   +2 more
openaire   +3 more sources

Hydrodynamic Synchronization and Metachronal Waves on the Surface of the Colonial AlgaVolvox carteri [PDF]

Physical Review Letters, 2012
From unicellular ciliates to the respiratory epithelium, carpets of cilia display metachronal waves, long-wavelength phase modulations of the beating cycles, which theory suggests may arise from hydrodynamic coupling. Experiments have been limited by a lack of organisms suitable for systematic study of flagella and the flows they create.
Brumley, DR, Polin, M, Pedley, TJ, Goldstein, RE   +3 more
openaire   +5 more sources

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

Why Homoscleromorph Sponges Have Ciliated Epithelia: Evidence for an Ancestral Role in Mucociliary Driven Particle Flux

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Epithelia are typically ciliated, except in sponges. Of all Porifera only Homoscleromorphs have motile cilia on their epithelia. Our data highlight the presence of cilia and mucociliary particle transport as a common feature of metazoa and a secondary loss in other sponge lineages.
Veronica L. Price, Anudi Nanayakkara, Andrea Pasini, Elsa Bazellières, Amelie Vernale, Caroline Rocher, Carole Borchiellini, Andre Le Bivic, Emmanuelle Renard, Sally P. Leys   +9 more
wiley   +1 more source