期刊
LAB ON A CHIP
卷 8, 期 10, 页码 1640-1647出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b805176c
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资金
- NSF NIRT [CTS-0304128]
- Singapore-MIT Alliance
- Nature Science and Engineering Research Council of Canada (NSERC)
Spherical and non-spherical magnetic hydrogel particles were synthesized in a microfluidic device containing an embedded UV light reflector. Monodisperse magnetic emulsion droplets were generated in a T-junction and allowed to relax into spheres, disks, and plugs in confining microchannel geometries. Particle morphology was locked-in via UV-initiated photopolymerization. The role of the reflector in the microchannel is to provide a uniform distribution of UV energy to the magnetic emulsion droplets and to increase the UV flux, which significantly improves UV polymerization conditions for microfluidic-based particle synthesis. Magnetic nanoparticles were uniformly encapsulated in the hydrogel, giving the microparticles superparamagnetic behavior. Additionally, the non-spherical particles show anisotropic responses under an applied external magnetic field.
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