Synthesis of size-controlled monodisperse manganese carbonate microparticles as templates for uniform polyelectrolyte microcapsule formation
Synthesis of size-controlled monodisperse manganese carbonate microparticles as templates for uniform polyelectrolyte microcapsule formation
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DOI：
10.1021/cm048229r
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发表时间：
2005-04
影响因子：
8.6
通讯作者：
Huiguang Zhu;E. Stein;Zonghuan Lu;A. Lvov;M. Mcshane
中科院分区：
文献类型：
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作者：
Huiguang Zhu;E. Stein;Zonghuan Lu;A. Lvov;M. Mcshane
无机胶体通常是通过沉淀反应制备的，这包括两个顺序的步骤：成核和生长。在这一理论的基础上，将稀释的碳酸氢铵与硫酸锰溶液混合作为核，制备出单分散的碳酸锰微粒子，制备了预制的碳酸锰纳米种子。结果表明，通过加入不同体积的纳米种子溶液，可以在1~10μm的范围内微调纳米粒子的平均直径。进一步验证了碳酸锰微粒子可以作为模板有效地形成均匀、光滑的多层聚电解质微胶囊，这是一种在生物医学和其他方面的应用，如生物传感器、生物反应器和药物释放装置。
Inorganic colloids are usually prepared via precipitation reactions, which involve two sequential steps: nucleation and growth of the nuclei. On the basis of this theory, preformed manganese carbonate nanoseeds were prepared by mixing diluted ammonium hydrogen carbonate with manganese sulfate solution to serve as nuclei for production of monodisperse manganese carbonate microparticles. It was found that the average particle diameter can be finely tuned from 1 to 10 μm by adding a different volume of nanoseed solution. It was further verified that the manganese carbonate microparticles can be used as templates for efficient formation of uniform, smooth multilayer polyelectrolyte microcapsules, which are promising systems for biomedical and other applications, such as biosensors, bioreactors, and drug-delivery devices.