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Article

Magnetic-Responsive Bendable Nozzles for Open Surface Droplet Manipulation

1
INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
2
Abifor AG, Untere Mühlewiesen 8, 79793 Wutoschingen, Germany
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(11), 1792; https://doi.org/10.3390/polym11111792
Received: 20 August 2019 / Revised: 18 October 2019 / Accepted: 28 October 2019 / Published: 1 November 2019
(This article belongs to the Special Issue Polymer Material Design by Microfluidics)
The handling of droplets in a controlled manner is essential to numerous technological and scientific applications. In this work, we present a new open-surface platform for droplet manipulation based on an array of bendable nozzles that are dynamically controlled by a magnetic field. The actuation of these nozzles is possible thanks to the magnetically responsive elastomeric composite which forms the tips of the nozzles; this is fabricated with Fe3O4 microparticles embedded in a polydimethylsiloxane matrix. The transport, mixing, and splitting of droplets can be controlled by bringing together and separating the tips of these nozzles under the action of a magnet. Additionally, the characteristic configuration for droplet mixing in this platform harnesses the kinetic energy from the feeding streams; this provided a remarkable reduction of 80% in the mixing time between drops of liquids about eight times more viscous than water, i.e., 6.5 mPa/s, when compared against the mixing between sessile drops of the same fluids. View Full-Text
Keywords: droplet manipulation; magnetic responsive elastomers; open-surface microfluidics droplet manipulation; magnetic responsive elastomers; open-surface microfluidics
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MDPI and ACS Style

Prieto-López, L.O.; Xu, J.; Cui, J. Magnetic-Responsive Bendable Nozzles for Open Surface Droplet Manipulation. Polymers 2019, 11, 1792. https://doi.org/10.3390/polym11111792

AMA Style

Prieto-López LO, Xu J, Cui J. Magnetic-Responsive Bendable Nozzles for Open Surface Droplet Manipulation. Polymers. 2019; 11(11):1792. https://doi.org/10.3390/polym11111792

Chicago/Turabian Style

Prieto-López, Lizbeth O.; Xu, Jiajia; Cui, Jiaxi. 2019. "Magnetic-Responsive Bendable Nozzles for Open Surface Droplet Manipulation" Polymers 11, no. 11: 1792. https://doi.org/10.3390/polym11111792

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