Self-assembly of a silica-surfactant nanocomposite in a porous alumina membrane
Self-assembly of a silica-surfactant nanocomposite in a porous alumina membrane
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DOI：
10.1038/nmat1107
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发表时间：
2004-05-01
期刊：
影响因子：
41.2
通讯作者：
Teramae, N
中科院分区：
文献类型：
--
作者：
Yamaguchi, A;Uejo, F;Teramae, N
由直径均匀的纳米通道组成的介孔膜具有用于分子的精确尺寸排他分离的潜在用途。在这里，我们报告了一种形成由二氧化硅-表面活性剂纳米复合材料和多孔氧化铝膜组成的杂化膜的新方法，通过该方法，分子跨膜的尺寸选择性传输成为可能。每个柱状氧化铝孔内形成的纳米复合材料是表面活性剂模板化的二氧化硅-纳米通道的组装体，通道直径为3.4 nm；通道方向主要沿着柱状氧化铝孔的壁定向。分子可以跨膜运输，包括具有纳米级尺寸排他分离能力的二氧化硅-表面活性剂纳米复合材料。我们提出的膜系统不仅具有分离科学的潜在用途，而且还具有催化和芯片技术的潜在用途。
A mesoporous membrane composed of nanochannels with a uniform diameter has a potential use for precise size-exclusive separation of molecules. Here, we report a novel method to form a hybrid membrane composed of silica-surfactant nanocomposite and a porous alumina membrane, by which size-selective transport of molecules across the membrane becomes possible. The nanocomposite formed inside each columnar alumina pore was an assembly of surfactant-templated silica-nanochannels with a channel diameter of 3.4 nm; the channel direction being predominantly oriented along the wall of the columnar alumina pore. Molecules could be transported across the membrane including the silica-surfactant nanocomposite with a capability of nanometre-order size-exclusive separation. Our proposed membrane system has a potential use not only for separation science, but also catalysis and chip technologies.