Sol–gel nanohybrid materials prepared via supramolecular organization
Sol–gel nanohybrid materials prepared via supramolecular organization
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DOI：
10.1007/s10971-007-1646-3
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发表时间：
2008-06
影响因子：
2.5
通讯作者：
Kiyofumi Katagiri
中科院分区：
文献类型：
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作者：
Kiyofumi Katagiri
本文综述了近年来基于超分子结构的溶胶-凝胶纳米杂化材料的合成研究进展。通过对前驱体的分子设计和合成过程的系统控制，已经获得了多种纳米杂化材料。具有共价连接的疏水尾部的有机烷氧基硅烷被水解以形成含有硅烷醇基团的两亲性分子，导致形成囊泡结构。所得的杂化物具有类似细胞膜和二氧化硅颗粒的结构，被命名为“cerasome”。所述神经酰胺酶体可实现囊泡颗粒在基底上的分级三维组织。纳米杂化物的形成不仅依靠两亲分子间的疏水相互作用，而且还依靠静电相互作用。采用水溶性二氧化钛前驱体与聚阳离子的逐层（LbL）组装用于在基底上含有二氧化钛纳米颗粒的纳米杂化涂层。此外，还讨论了利用LbL组装和溶胶-凝胶法结合胶体模板制备杂化空心胶囊的方法。
This article reports on recent progress in the synthesis of sol–gel nanohybrid materials based on the supramolecular organization. A variety of nanohybrid materials has been obtained by molecular design of the precursors and systematical control of synthetic processes. Organoalkoxysilanes with covalently attached hydrophobic tails are hydrolyzed to form amphiphilic molecules containing silanol groups, leading to the formation of vesicular structures. The obtained hybrid has analogous structures of both cell membrane and silica particle and was named “cerasome”. The cerasome can achieve the hierarchical three-dimensional organization of vesicular particles on the substrate. The nanohybrids are developed not only by the hydrophobic interaction of amphiphilic molecules but also by the electrostatic interaction. The layer-by-layer (LbL) assembly of the water-soluble titania precursor with polycation is adopted for nanohybrid coatings containing titania nanoparticles on the substrates. In addition, preparation of hybrid hollow capsules via LbL assembly and sol–gel method with colloid templating is also discussed.