Abstract
Magnetic droplets, consisting of magnetic nanoparticles in a carrier fluid, are of high interest due to applications such as remote and wireless control in a microfluidic environment. We investigated the influence of magnetic field on the control of ferrofluid droplet size in a nonmagnetic carrier fluid. Generation of larger droplets by a re-pumping mechanism was studied. The magnetic field leads to coalescence and mixing of the magnetic droplets. A significant response of the ferrofluid droplets to changes in flow rate ratio, the viscosity of the carrier medium and magnetic field intensity was observed. The droplet size can be increased by three times of its initial diameter by tuning the magnetic field intensity. Our modeling results show a similar trend to the experimental findings. Such control, mixing, and re-pumping of droplets is relevant to novel Lab-on-a-Chip applications.
| Original language | English |
|---|---|
| Pages (from-to) | 760-768 |
| Number of pages | 9 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 242 |
| DOIs | |
| Publication status | Published - Apr 1 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016 Elsevier B.V.
ASJC Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry
Keywords
- Actuation
- Coalescence
- Droplets
- Ferrofluid
- Magnetic field
- Re-pumping
- Viscosity