Department of Chemistry, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan.
J Colloid Interface Sci. 2010 Mar 1;343(1):7-17. doi: 10.1016/j.jcis.2009.11.032. Epub 2009 Nov 24.
We demonstrate a simple method to synthesize silver wires by thermal reduction of aqueous AgNO(3) droplet with catalytic anatase TiO(2) nanoparticles which were spin-coated on Si wafer. Structural characterization of the silver wires shows that the nanowires grow primarily along the [011] direction. SEM image of the silver wires clearly shows the catalytic TiO(2) nano-cluster attached to the end of the each silver wire. Since the process was surfactant-free, the silver nanowires prepared by our method retain the excellent electrical conductivity. The intrinsic resistivity calculated from the current-voltage curve for a wire with 12880.41 nm(2) cross-section area was 18.72 microohm cm, which is about 11.6 times higher than that of bulk silver (1.61 microohm cm). Our simple method can be also applied to generate CuO with ring-shaped microstructure by using ITO conducting glass as matrix. We have found that the size and reproducibility are well-controllable. A single phase of CuO ring-shaped microstructure with outer diameters ranging from approximately 13 to 17 microm and inner diameters ranging from approximately 1.4 to 3.3 microm was obtained. The composition of CuO microring was confirmed by thin-film XRD and XPS analyses.
我们展示了一种简单的方法，通过热还原涂覆在硅片上的具有催化作用的锐钛矿 TiO2 纳米粒子的水溶液 AgNO3 液滴来合成银线。银线的结构特征表明，纳米线主要沿着[011]方向生长。银线的 SEM 图像清楚地显示出每个银线末端附着的催化 TiO2 纳米簇。由于该过程中不含表面活性剂，因此我们的方法制备的银纳米线保留了优异的导电性。从具有 12880.41nm² 横截面面积的线的电流-电压曲线上计算出的体电阻率为 18.72 微欧姆·厘米，约为体银（1.61 微欧姆·厘米）的 11.6 倍。我们的简单方法也可以应用于以 ITO 导电玻璃为基体生成具有环形微观结构的 CuO。我们发现尺寸和重现性都可以很好地控制。得到了具有约 13 至 17μm 外径和约 1.4 至 3.3μm 内径的单一组分的 CuO 环形微观结构。CuO 微环的组成通过薄膜 XRD 和 XPS 分析得到了证实。
