Atanasova Petia, Weitz R Thomas, Gerstel Peter, Srot Vesna, Kopold Peter, van Aken Peter A, Burghard Marko, Bill Joachim
Institut für Materialwissenschaft, Universität Stuttgart and Max-Planck-Institut für Metallforschung, Heisenbergstrasse 3, 70569 Stuttgart, Germany.
Nanotechnology. 2009 Sep 9;20(36):365302. doi: 10.1088/0957-4484/20/36/365302. Epub 2009 Aug 18.
In this paper, we report a novel synthetic approach towards electrically conductive ZnO nanowires close to ambient conditions using lambda-DNA as a template. Initially, the suitability of DNA to assemble ZnO nanocrystals into thin coatings was investigated. The ZnO nanowires formed on stretched and aligned lambda-DNA molecules were prepared via chemical bath deposition (CBD) of zinc acetate in methanol solution in the presence of polyvinylpyrrolidone (PVP). After 10 deposition cycles, the nanowires exceed 10 microm in length and the height can be varied from 12 to around 40 nm. The nanocrystalline structure of the ZnO wires was confirmed by high-resolution transmission electron microscopy (HRTEM). The electrical conductivity was found to be of the order of several Omega cm at room temperature in two terminal measurements.
在本文中，我们报道了一种在接近环境条件下使用λ-DNA作为模板合成导电氧化锌纳米线的新方法。首先，研究了DNA将氧化锌纳米晶体组装成薄涂层的适用性。在聚乙烯吡咯烷酮（PVP）存在下，通过在甲醇溶液中对醋酸锌进行化学浴沉积（CBD），在拉伸和排列的λ-DNA分子上形成氧化锌纳米线。经过10个沉积循环后，纳米线长度超过10微米，高度可在12至约40纳米之间变化。通过高分辨率透射电子显微镜（HRTEM）确认了氧化锌线的纳米晶体结构。在室温下的双端测量中，发现电导率约为几Ω·cm。
