Packing of Emulsion Droplets: Structural and Functional Motifs for Multi-Cored Microcapsules

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Advances in microfluidic emulsification have enabled the creation of multiphase emulsion drops, which have emerged as promising templates for producing functional microcapsules. However, most previous micro-encapsulation methods have limitations in terms of capsule stability, functionality, and simplicity of fabrication procedures. Here, we report a simple single-step encapsulation technique that uses an optofluidic platform to efficiently and precisely encapsulate a specific number of emulsion droplets in photocurable shell droplets. In particular, we show, for the first time, that densely confined core droplets within an oily shell droplet rearrange into a unique configuration that minimizes the interfacial energy, as confirmed here from theory. These structures are then consolidated into multi-cored microcapsules with structural and mechanical stability through in situ photopolymerization of the shell in a continuous mode, which are capable of isolating active materials and releasing them in a controlled manner using well-defined nanohole arrays or nanoscopic silver architectures on thin membranes.
Publisher
WILEY-BLACKWELL
Issue Date
2011-05
Language
English
Article Type
Article
Keywords

MONODISPERSE DOUBLE EMULSIONS; MICROFLUIDIC DEVICES; PARTICLES; SILICA; FABRICATION; METAL; NANOPARTICLES; MICROSPHERES; CLUSTERS; SHELLS

Citation

ADVANCED FUNCTIONAL MATERIALS, v.21, no.9, pp.1608 - 1615

ISSN
1616-301X
DOI
10.1002/adfm.201002316
URI
http://hdl.handle.net/10203/100001
Appears in Collection
CBE-Journal Papers(저널논문)
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