Wang Yewu, Kim Kwang S
Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China. Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, South Korea.
Nanotechnology. 2008 Jul 2;19(26):265303. doi: 10.1088/0957-4484/19/26/265303. Epub 2008 May 19.
A modified polyol process is introduced for the production of single-crystal bismuth (Bi) nanowires with uniform diameters along each wire in relatively high yield. The appropriate amount of NaOH in the solution reacts with Bi(3+) to form water-soluble complexing ions BiO(2)(-). The tiny Bi nanoparticles formed at the initial stage could serve as seeds for the subsequent growth of Bi nanostructures in the refluxing process with the aid of PVP. We find that the amount of NaOH determines the reduction rate of BiO(2)(-), which influences the morphologies of the synthesized Bi nanostructures. High reduction rates result in nanowires and nanoparticles, while low reduction rates result in nanoplates.
介绍了一种改进的多元醇法，用于高产率地制备沿每根导线直径均匀的单晶铋（Bi）纳米线。溶液中适量的NaOH与Bi(3+)反应形成水溶性络合离子BiO(2)(-)。在回流过程中，借助PVP，初始阶段形成的微小Bi纳米颗粒可作为Bi纳米结构后续生长的晶种。我们发现，NaOH的量决定了BiO(2)(-)的还原速率，这会影响合成的Bi纳米结构的形态。高还原速率导致纳米线和纳米颗粒，而低还原速率导致纳米片。
