Tan Zhenquan, Xu Hui, Abe Hiroya, Naito Makio, Ohara Satoshi
Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
J Nanosci Nanotechnol. 2010 Jun;10(6):3978-82. doi: 10.1166/jnn.2010.1961.
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).
我们报道了银纳米颗粒负载的碳纳米管纳米复合材料独特的组装行为。最初，通过NaBH₄化学还原和/或直接在水溶液中进行光还原，银纳米颗粒均匀沉淀在十二烷基硫酸钠包覆的碳纳米管壁上。随后向银-碳纳米管分散液中加入额外的银源，并在弱碱性条件下用羟胺进一步还原银。所得银-碳纳米管纳米复合材料的形态强烈依赖于Ag⁺离子浓度。有趣的是，当银浓度增加到0.1 M（实际浓度）时，观察到银-碳纳米管纳米复合材料呈现各向异性的多面体自组装。
