Microfluidic synthesis of anisotropic particles from Janus drop by in situ photopolymerization
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- Choi, CH., Hwang, S., Jeong, JM. et al. Biomed. Eng. Lett. (2012) 2: 95. doi:10.1007/s13534-012-0057-8
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This study presents a microfluidic method to generate anisotropic particles from Janus drop with high flexibility to control their shapes by in situ photopolymerization.
Janus drops are continuously formed as the oil phase breaks up the two laminar flows of a photocurable fluid and a sacrificial template. Our method to generate anisotropic particles includes two routes: In situ polymerization of Janus drop in equilibrium state and evolved drop in nonequilibrium state.
The resulting drop has allowed us to synthesize hemispheres with flat bottom and 3D particles. Also, the formation of the Janus drop and their evolution is theoretically estimated by spreading coefficient.
We anticipate that this novel fabrication approach presented in this work can be applied to produce novel functional material in various applications such as self-assembly, photonics, diagnostics, and drug-delivery.