Droplet Merging on a Lab-on-a-Chip Platform by Uniform Magnetic Fields

Droplet microfluidics offers a range of Lab-on-a-chip (LoC) applications. However, wireless and programmable manipulation of such droplets is a challenge. We address this challenge by experimental and modelling studies of uniform magnetic field induced merging of ferrofluid based droplets. Control o...

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Bibliographic Details
Published in:Scientific reports 2016-11, Vol.6 (1), p.37671-37671, Article 37671
Main Authors: Varma, V. B., Ray, A., Wang, Z. M., Wang, Z. P., Ramanujan, R. V.
Format: Article
Language:English
Subjects:
639/766/1130
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639/766/189
Bioassays
Biosensors
Flow rates
Humanities and Social Sciences
Lab-on-a-chip
Magnetic fields
Magnetism
Magnetite
Microfluidics
multidisciplinary
Science
Velocity
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Summary:Droplet microfluidics offers a range of Lab-on-a-chip (LoC) applications. However, wireless and programmable manipulation of such droplets is a challenge. We address this challenge by experimental and modelling studies of uniform magnetic field induced merging of ferrofluid based droplets. Control of droplet velocity and merging was achieved through uniform magnetic field and flow rate ratio. Conditions for droplet merging with respect to droplet velocity were studied. Merging and mixing of colour dye + magnetite composite droplets was demonstrated. Our experimental and numerical results are in good agreement. These studies are useful for wireless and programmable droplet merging as well as mixing relevant to biosensing, bioassay, microfluidic-based synthesis, reaction kinetics, and magnetochemistry.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep37671