Ordered reactive nanomembranes/nanotemplates from thin films of block copolymer supramolecular assembly
Ordered reactive nanomembranes/nanotemplates from thin films of block copolymer supramolecular assembly
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DOI：
10.1021/ja036085w
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发表时间：
2003-10-08
影响因子：
15
通讯作者：
Stamm, M
中科院分区：
文献类型：
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作者：
Sidorenko, A;Tokarev, I;Stamm, M
我们报告了一种独特的，非常简单的方法制备反应膜和纳米模板与纳米级圆柱形通道的各种无机和聚合物基板的表面上。利用聚苯乙烯-嵌段-4-乙烯基吡啶（PS-PVP）和2-（4 '-羟基苯偶氮）苯甲酸（HABA）的超分子组装体制备了有序的纳米结构聚合物薄膜，薄膜由PVP-HABA缔合物形成的圆柱形纳米畴和PS包围而成。已经显示出的域的对齐被切换后，暴露于不同的溶剂的蒸气从平行到垂直的取向的限制表面，反之亦然。由于超分子PVP-HABA组装体的自适应行为，圆柱形纳米畴的排列对限制表面的组成不敏感。用选择性溶剂提取HABA产生具有直径为8 nm的中空通道的六边形晶格（周期为24 nm）的纳米膜，所述中空通道从顶部到底部穿过膜。通道的壁由反应性PVP链构成。通过电沉积方法用Ni团簇填充通道，以制备1.2tera/cm（2）的金属纳米点的有序阵列。
We report on a unique, very simple method of preparation of reactive membranes and nanotemplates with nanoscopic cylindrical channels on the surface of various inorganic and polymeric substrates. Well-ordered nanostructured thin polymer films have been fabricated from the supramolecular assembly of poly(styrene-block-4-vinylpyridine) (PS-PVP) and 2-(4'-hydroxybenzeneazo)benzoic acid (HABA), consisting of cylindrical nanodomains formed by PVP-HABA associates surrounded by PS. Alignment of the domains has been shown to be switched upon exposure to vapors of different solvents from the parallel to perpendicular orientation to the confining surface and vice versa. The alignment of the cylindrical nanodomains is insensitive to the composition of the confining surface due to the self-adaptive behavior of the supramolecular PVP-HABA assembly. Extraction of HABA with selective solvent results in nanomembranes with a hexagonal lattice (24 nm in the period) of hollow channels of 8 nm in the diameter crossing the membrane from the top to the bottom. The walls of the channels are constituted from reactive PVP chains. The channels were filled with Ni clusters via the electrodeposition method to fabricate the ordered array of metallic nanodots of 1.2 tera per cm(2).