One-step production of highly anisotropic particles via a microfluidic method
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- One-step production of highly anisotropic particles via a microfluidic method
- Xia, Ming; Go, Eun Min; Choi, Kyu Hwan; Lim, Jin Hyun; Park, Bumkyo; Yu, Taekyung; Im, Sang Hyuk; Kwak, Sang Kyu; Park, Bum Jun
- Microfluidics; Anisotropy; Nanoparticles; Phase separation; Interface
- Issue Date
- ELSEVIER SCIENCE INC
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.64, no., pp.328 - 336
- We introduce a promising protocol that can be used to fabricate polymer particles with a high degree of shape anisotropy; this method can be utilized with a variety of microfluidic generation methods. Low-density microparticles and high-density nanoparticles vertically migrated in a polymer solution confined in emulsion droplets that were produced via a microfluidic method. As the solvent evaporated in individual droplets at ambient conditions, the low-density microparticles migrated upward because their density was lower than that of the polymer solution. The high-density nanoparticles that were initially well-dispersed in the droplet phase became destabilized upon solvent removal, leading to the formation of aggregates and sedimentation in a downward direction. The migration of the particle components during solvent evaporation induced shape deformation/modification of the emulsion droplets; consequently, polymer particles with highly anisotropic shapes were created after drying.
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