Microscale flow propulsion through bioinspired and magnetically actuated artificial cilia

AbstractA numerical model is developed to analyse the interaction of artificial cilia with the surrounding fluid in a three-dimensional setting in the limit of vanishing fluid inertia forces. The cilia are modelled using finite shell elements and the fluid is modelled using a boundary element approach. The coupling between both models is performed by imposing no-slip boundary conditions on the surface of the cilia. The performance of the model is verified using various reference problems available in the literature. The model is used to simulate the fluid flow due to magnetically actuated artificial cilia. The results show that narrow and closely spaced cilia create the largest flow, that metachronal waves along the width of the cilia create a significant flow in the direction of the cilia width and that the recovery stroke in the case of the out-of-plane actuation of the cilia strongly depends on the cilia width.

Download Full-text

Bio-inspired design: Inner-motile multifunctional ZnO/CdS heterostructures magnetically actuated artificial cilia film for photocatalytic hydrogen evolution

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2014.09.050 ◽

2015 ◽

Vol 165 ◽

pp. 419-427 ◽

Cited By ~ 38

Author(s):

Fengping Peng ◽

Qiang Zhou ◽

Dunpu Zhang ◽

Chunhua Lu ◽

Yaru Ni ◽

...

Keyword(s):

Hydrogen Evolution ◽

Photocatalytic Hydrogen Evolution ◽

Magnetically Actuated ◽

Artificial Cilia

Download Full-text

Bio-inspired Microfluidic Propulsion Through Magnetically-actuated Cilia

MRS Proceedings ◽

10.1557/proc-1191-oo05-12 ◽

2009 ◽

Vol 1191 ◽

Author(s):

Syed Khaderi ◽

Michiel Baltussen ◽

Patrick Anderson ◽

D. Ioan ◽

Jaap den Toonder ◽

...

Keyword(s):

Magnetic Field ◽

Solid Mechanics ◽

Microfluidic Channel ◽

Lab On A Chip ◽

Magnetic Films ◽

Characteristic Set ◽

Physical Mechanisms ◽

Magnetically Actuated ◽

Artificial Cilia ◽

Flow Through

AbstractManipulation of bio-fluids in microchannels faces many challenges in the development of lab-on-a-chip devices. We propose magnetically actuated artificial cilia which can propel fluids in microchannels. These cilia are magnetic films which can be actuated by an external magnetic field, leading to an asymmetric motion like that of natural cilia. The coupling between different physical mechanisms (magnetostatics, solid mechanics and fluid dynamics) is numerically established. In this work we quantify the flow through a microfluidic channel as a function of its geometry for a characteristic set of dimensionless parameters.

Download Full-text

The design of an inner-motile waste-energy-driven piezoelectric catalytic system

New Journal of Chemistry ◽

10.1039/d1nj00993a ◽

2021 ◽

Author(s):

Fengping Peng ◽

Wanxin Xu ◽

Yunya Hu ◽

Weijie Fu ◽

Haozhen Li ◽

...

Keyword(s):

Catalytic System ◽

Ciliary Movement ◽

Magnetically Actuated ◽

System P ◽

Artificial Cilia ◽

Waste Energy ◽

New Type

Inspired by the microorganisms in nature, a new type of waste-energy-driven catalytic film is explored firstly by using magnetically actuated artificial cilia. Due to its singular characteristic of ciliary movement,...

Download Full-text

A bio-inspired inner-motile photocatalyst film: a magnetically actuated artificial cilia photocatalyst

Nanoscale ◽

10.1039/c4nr00644e ◽

2014 ◽

Vol 6 (10) ◽

pp. 5516-5525 ◽

Cited By ~ 28

Author(s):

Dunpu Zhang ◽

Wei Wang ◽

Fengping Peng ◽

Jiahui Kou ◽

Yaru Ni ◽

...

Keyword(s):

Mass Transfer ◽

Photocatalytic Performance ◽

Microfluidic Mixing ◽

Mass Transfer Limitation ◽

Magnetically Actuated ◽

Artificial Cilia

An inner-motile photocatalyst film is developed by employing artificial cilia, which provides an impactful methodology for overcoming mass transfer limitation due to the microfluidic mixing capability. The photocatalytic performance is significantly enhanced.

Download Full-text

Magnetically-actuated artificial cilia for microfluidic propulsion

Lab on a Chip ◽

10.1039/c0lc00411a ◽

2011 ◽

Vol 11 (12) ◽

pp. 2002 ◽

Cited By ~ 94

Author(s):

S. N. Khaderi ◽

C. B. Craus ◽

J. Hussong ◽

N. Schorr ◽

J. Belardi ◽

...

Keyword(s):

Magnetically Actuated ◽

Artificial Cilia

Download Full-text

Nonlinear Models for Optimal Placement of Magnetically-Actuated Cilium

Volume 3: Nonlinear Estimation and Control; Optimization and Optimal Control; Piezoelectric Actuation and Nanoscale Control; Robotics and Manipulators; Sensing; System Identification (Estimation for Automotive Applications, Modeling, Therapeutic Control in Bio-Systems); Variable Structure/Sliding-Mode Control; Vehicles and Human Robotics; Vehicle Dynamics and Control; Vehicle Path Planning and Collision Avoidance; Vibrational and Mechanical Systems; Wind Energy Systems and Control ◽

10.1115/dscc2013-3808 ◽

2013 ◽

Cited By ~ 1

Author(s):

Nathan Banka ◽

Santosh Devasia

Keyword(s):

Nonlinear Models ◽

Nonlinear Effects ◽

Optimal Location ◽

Optimal Placement ◽

Linear Modeling ◽

Magnetically Actuated ◽

Artificial Cilia ◽

Simulation Results ◽

Flow Manipulation ◽

Dynamics Models

Artificial cilia systems are used for microfluidic manipulation. By analogy to the biological cilia, such systems seek to mix, separate, or propel fluids, particularly in the low-Reynolds-number regime, without damaging sensitive samples. An important category of artificial cilia systems is magnetically-actuated artificial cilia, since the driving magnetic field does not interact with many samples of interest. Simulation results are presented to show that linear modeling fails to adequately predict the optimal location due to strong nonlinear effects; using the linear result to select magnet placement results in amplitudes 84% lower than the amplitude with the optimal placement found using the nonlinear model. This represents a substantial loss in efficacy. Since large amplitudes are desirable to enhance flow manipulation, the results illustrate the importance of nonlinear dynamics models in the design of magnet-cilia devices.

Download Full-text