Precipitation of Inorganic Salts inside Hollow Micrometer-Sized Polyelectrolyte Shells

详细信息    查看全文

• 作者：Sukhorukov ; Gleb B. ; Susha ; Andrei S. ; Davis ; Sean ; Leporatti ; Stefano ; Donath ; Edwin ; Hartmann ; Jü ; rgen ; et. al.
• 关键词：layer-by-layer ; polyelectrolyte ; calcium carbonate ; barium carbonate ; colloid ; shell ; microcapsules
• 刊名：Journal of Colloid and Interface Science
• 出版年：2002
• 出版时间：March 1, 2002
• 年：2002
• 卷：247
• 期：1
• 页码：251-254
• 全文大小：138 K

文摘

Hollow polymer shells formed by layer-by-layer adsorption of oppositely charged polyelectrolytes onto micrometer-sized colloidal particles with subsequent decomposition of the colloidal core were employed as a model system for the study of inorganic crystallization reactions in restricted volumes. The size-selective permeability of shells is used for spatially controlling the precipitation of inorganic salts CaCO₃ and BaCO₃ into the shell interior. Outside the shells the precipitation was suppressed by the polymers, which are unable to penetrate the shell wall. The precipitates were studied by scanning electron microscopy and atomic force microscopy. The fundamental and applied aspects of research on spatially confined synthesis of inorganic particles are under discussion.