Highly swollen liquid crystals as new reactors for the synthesis of nanomaterials
Highly swollen liquid crystals as new reactors for the synthesis of nanomaterials
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DOI：
10.1021/cm0484495
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发表时间：
2005-02
影响因子：
8.6
通讯作者：
Geetarani Surendran;M. Tokumoto;E. P. Santos;H. Remita;L. Ramos;P. Kooyman;C. Santilli;C. Bourgaux;P. Dieudonné;E. Prouzet
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文献类型：
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作者：
Geetarani Surendran;M. Tokumoto;E. P. Santos;H. Remita;L. Ramos;P. Kooyman;C. Santilli;C. Bourgaux;P. Dieudonné;E. Prouzet
纳米材料的合成和自组装可以通过软物质的性质来控制。一方面，可以设计专用的纳米反应器，如反相微乳液或细乳液。另一方面，可以通过将反应介质限制在特定几何形状内的液晶的拓扑结构来提供直接形状控制。在第一种情况下，微乳液或细乳液的制备通常需要强有力的机械搅拌。第二种方法使用化学稳定的体系，但它通常仍然限于二元（水+表面活性剂）体系。我们报告了在高度有序的四元介质中制备不同家族的材料，这些材料表现出具有高晶胞参数的液晶结构。它们是用盐水、非极性溶剂、表面活性剂和助表面活性剂的适当比例制备的，它们形成自发溶胀的六方相。这些溶胀液晶可以从所有类型的表面活性剂（阳离子，阴离子和非离子）制备。
Synthesis and self-assembly of nanomaterials can be controlled by the properties of soft matter. On one hand, dedicated nanoreactors such as reverse microemulsions or miniemulsions can be designed. On the other hand, direct shape control can be provided by the topology of liquid crystals that confine the reacting medium within a specific geometry. In the first case, the preparation of micro- or miniemulsions generally requires energetic mechanical stirring. The second approach uses thermodynamically stable systems, but it remains usually limited to binary (water + surfactant) systems. We report the preparation of different families of materials in highly ordered quaternary mediums that exhibit a liquid crystal structure with a high cell parameter. They were prepared with the proper ratios of salted water, nonpolar solvent, surfactant, and cosurfactants that form spontaneously swollen hexagonal phases. These swollen liquid crystals can be prepared from all classes of surfactants (cationic, anionic, and non...