Particles with Coordinated Patches or Windows from Oil-in-Water Emulsions
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- 作者：Young-Sang Cho ; Gi-Ra Yi ; Shin-Hyun Kim ; Seog-Jin Jeon ; Mark T. Elsesser ; Hyung Kyun Yu ; Seung-Man Yang ; David J. Pine
- 刊名：Chemistry of Materials
- 出版年：2007
- 出版时间：June 26, 2007
- 年：2007
- 卷：19
- 期：13
- 页码：3183 - 3193
- 全文大小：991K
- 年卷期：v.19,no.13(June 26, 2007)
- ISSN：1520-5002
文摘
In this paper, we demonstrated a unique and simple method for fabricating colloidal particles of complexstructures using oil-in-water emulsion droplets as confined geometries. A variety of structural motifswere produced using binary colloids of microspheres of polystyrene (PS) or silica and nanosized particlesas the second component. When PS or silica microspheres and PS macromolecules were dispersed inoil-in-water emulsion droplets, particles with well-coordinated patches were obtained because the PSmacromolecules partially covered the microsphere clusters. When silica or gold nanoparticles weredispersed together with the PS microspheres in oil-in-water emulsion droplets instead of PS macromolecules, composite particles with patches were obtained. In this case, silica or gold shell structures withwell-coordinated windows were produced by selectively removing the large PS microspheres from theorganic-inorganic composite clusters.