ArticleParticle & particle systems characterization : measurement and description of particle properties and behavior in powders and other disperse systems2023
Size tunable fabrication of magnetic alginate microparticles using flow focusing microfluidics.
Article in Particle & particle systems characterization : measurement and description of particle properties and behavior in powders and other disperse systems, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Tuning hydrogel properties and Schwann cell behavior through microchannel size control in magnetically templated hydrogels.Biomaterials science · 2026Article
- Patterning of anisotropic physical cues in granular PEG hydrogel composites using magnetic templating.Industrial & engineering chemistry research · 2025Article
- Microfluidic formulation and characterization of size-tunable microparticle magnetic particle imaging tracers.Journal of magnetism and magnetic materials · 2025Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
We report the size tunable formulation of magnetic alginate microparticles (MAMs) using a 3D flow-focusing microfluidic device. The droplet phase consisted of iron oxide nanoparticles (IONPs) in an alginate solution and the continuous phase consisted of fluorocarbon oils. We studied the stability of IONP colloids in alginate and calcium ethylenediamine tetraacetic acid solutions using optical microscopy, dynamic light scattering, and zeta potential measurements. These studies suggest that IONPs coated with polyethylene glycol (PEG) were most stable. We then formulated MAMs using the PEG-coated IONP colloid and studied how MAM average size and coefficient of variance varied as a function of droplet and continuous phase flow rates and viscosities. Droplet and MAM size decreased when the carrier flow rate or viscosity increased, and droplet and MAM size increased when droplet flow rate or viscosity increased. Crosslinking and drying of droplets resulted in MAMs whose diameter was approximately 44% less than the original droplets while maintaining a population coefficient of variance below 8%. Conditions were identified that enable fabrication of MAMs with diameters between 30 - 60 μm with coefficients of variance of ~6-7%. These results may guide future work exploring the role of MAM size on various applications.
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Registered trials
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