近年来,由于具有双螺旋补偿结构,DNA分子作为智能模版被广泛应用于设计棒状或管状类的纳米结构.本文报道了应用DNA双螺旋模版将CdS纳米粒子自组装为CdS纳米线.制备的CdS纳米线由几根纳米线紧密缠绕在一起,也呈螺旋形结构,该结构在无机材料中是很少见的.该结构形成的主要原因归功于CdS纳米粒子和DNA分子间的强烈静电互作用,由于含自由基的CdS纳米粒子带负电荷,而氨基的DNA核酸根带正电荷.研究结果表明应用DNA模版制备纳米线是一种简便、高效的技术和方法.同时,DNA模版法也为从底上制备纳米级的材料和物体提供了广阔的空间.
DNA molecules are recently widely used as a smart templates material in designing rod-and tube-like nanostructures because of there famous double helix strands. In this paper, we present the fabrication of CdS nanowires by self-assembling CdS nanoparticles on double-stranded DNA templates. The nanowires are formed by a few nanowires screwing together, featuring a helix structure. The seldom structure in inorganic materials attributes to the strong electrostatic interaction between the free carboxyl on CdS nanoparticles with negative chargesand the amidocyanogen on DNA molecules with positive charges. The results show that it is a highly efficiency approach and technology to construct nanowires using DNA templates.
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