Issue 22, 2020

Microfluidic devices powered by integrated elasto-magnetic pumps


We show how an asymmetric elasto-magnetic system provides a novel integrated pumping solution for lab-on-a-chip and point of care devices. This monolithic pumping solution, inspired by Purcell's 3-link swimmer, is integrated within a simple microfluidic device, bypassing the requirement of external connections. We experimentally prove that this system can provide tuneable fluid flow with a flow rate of up to 600 μL h−1. This fluid flow is achieved by actuating the pump using a weak, uniform, uniaxial, oscillating magnetic field, with field amplitudes in the range of 3–6 mT. Crucially, the fluid flow can be reversed by adjusting the driving frequency. We experimentally prove that this device can successfully operate on fluids with a range of viscosities, where pumping at higher viscosity correlates with a decreasing optimal driving frequency. The fluid flow produced by this device is understood here by examining the non-reciprocal motion of the elasto-magnetic component. This device has the capability to replace external pumping systems with a simple, integrated, lab-on-a-chip component.

Graphical abstract: Microfluidic devices powered by integrated elasto-magnetic pumps

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Article information

Article type
15 Sep 2020
18 Oct 2020
First published
23 Oct 2020
This article is Open Access
Creative Commons BY license

Lab Chip, 2020,20, 4285-4295

Microfluidic devices powered by integrated elasto-magnetic pumps

J. L. Binsley, E. L. Martin, T. O. Myers, S. Pagliara and F. Y. Ogrin, Lab Chip, 2020, 20, 4285 DOI: 10.1039/D0LC00935K

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