研究了以胶体银纳米粒子为前体在多壁碳纳米管(MWNTs)表面进行的自组装及其银粒子尺寸对自组装的影响.结果表明:银粒子与MWNTs的平均直径之比≤1/3时,能够获得较好的Ag/MWNTs一维复合物材料,而且透射电镜(TEM)直接观察到银纳米粒子的自组装及其生长优先在MWNTs端头发生;基于各种技术表征,在N,N-二甲基甲酰胺(DMF)存在下MWNTs功能化的表面存在的羧基、羟基与柠檬酸根的多羧基、羟基基团之间的氢键作用以及疏水作用可能是银纳米粒子自组装的主要驱动力.
Self-assembly of colloidal silver nanoparticles as precursor on the multi-walled carbon nanotubes(MWNTs) and the effect of silver nanoparticle sizes were investigated.The results indicate that fine one dimension materials of Ag/ MWNTs composite can be obtained when the ratio of the average diameter between silver particles and CNTs is ≤ 1/3, and the self-assembly of silver nanoparticles and their growth may take place first at the ends on MWNTs by direct observation of TEM images. Based on the characterizations with various technologies, the main driving forces for self-assembly may be hydrophobic effect and hydrogen bonds between carboxyl and hydroxyl groups from citratic acid and the functioned MWNTs in the presence of DMF.
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