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Droplet Merging on a Lab-on-a-Chip Platform by Uniform Magnetic Fields
1School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
Scientific Reports
|November 29, 2016
Summary
This study demonstrates wireless and programmable droplet merging using magnetic fields in microfluidics. Ferrofluid droplets were controlled for applications in biosensing and microfluidic synthesis.
Area of Science:
- Microfluidics
- Magnetochemistry
- Lab-on-a-chip (LoC) technologies
Background:
- Droplet microfluidics enables diverse Lab-on-a-chip (LoC) applications.
- Wireless and programmable manipulation of droplets remains a significant challenge.
Purpose of the Study:
- To investigate uniform magnetic field-induced merging of ferrofluid droplets.
- To achieve wireless and programmable control over droplet velocity and merging.
Main Methods:
- Experimental studies of ferrofluid droplet behavior under uniform magnetic fields.
- Numerical modeling to understand droplet dynamics and merging conditions.
- Investigation of flow rate ratios for droplet control.
Main Results:
- Demonstrated control of droplet velocity and merging using magnetic fields and flow rate ratios.
- Established conditions for droplet merging based on droplet velocity.
- Successfully merged and mixed color dye and magnetite composite droplets.
Conclusions:
- Experimental and numerical results show good agreement.
- The developed method offers wireless and programmable droplet merging and mixing.
- Applications include biosensing, bioassay, microfluidic synthesis, reaction kinetics, and magnetochemistry.
