Anisotropic polyhedral self-assembly of Ag-CNT nanocomposites.
Anisotropic polyhedral self-assembly of Ag-CNT nanocomposites.
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DOI：
10.1166/jnn.2010.1961
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发表时间：
2010-06
影响因子：
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通讯作者：
Z. Tan;Hui Xu;H. Abe;M. Naito;S. Ohara
中科院分区：
文献类型：
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作者：
Z. Tan;Hui Xu;H. Abe;M. Naito;S. Ohara
我们报道了银纳米粒子支撑的碳纳米管纳米复合材料的独特组装行为。最初，银纳米颗粒均匀沉淀在SDS涂覆的CNT的壁上，通过NaBH 4化学还原和/或光还原直接在水溶液中。随后将另外的Ag源加入到Ag-CNT分散体中，并在弱碱性条件下使用羟胺进一步还原Ag。所得Ag-CNT纳米复合材料的形态强烈依赖于Ag+离子浓度。有趣的是，当Ag浓度增加到0.1 M（真实的浓度）时，观察到Ag-CNT纳米复合材料的各向异性多面体自组装。
We report the unique assembling behavior of Ag NP supported CNT nanocomposites. Initially Ag NPs were precipitated homogeneously on the walls of SDS-coated CNTs by a NaBH4 chemical reduction and/or photoreduction directly in an aqueous solution. An additional Ag source was subsequently added into the Ag-CNT dispersion and Ag was further reduced using hydroxylamine in a weakly alkaline condition. The morphology of the resulting Ag-CNT nanocomposites strongly depended on the Ag+ ion concentration. Interestingly, an anisotropic polyhedral self-assembly of Ag-CNT nanocomposites was observed when the Ag concentration was increased to 0.1 M (real concentration).