Zhou Bo, Zhu Jun-Jie
Department of Chemistry, Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, People's Republic of China. College of Chemistry and Environment Science, Nanjing Normal University, People's Republic of China.
Nanotechnology. 2006 Mar 28;17(6):1763-9. doi: 10.1088/0957-4484/17/6/037. Epub 2006 Mar 3.
A general and template-free 'disproportionation and reversal' route was developed to synthesize one-dimensional (1D) nanostructures of Te, Se and Se-Te alloys directly from Te or/and Se powders. The products were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and scanning electron microscopy (SEM). Te nanorods and nanowires with a width varying from about 40 nm to about 300 nm, Se nanowires with a width of 60-100 nm and a length of 4-6 µm, and SexTe100-x alloy nanorods with x in a wide range, and with a width of 30-70 nm and an aspect ratio of three to five, were prepared. The mechanism of formation of the nanorods and nanowires and the effects of the experimental conditions, such as solution concentration, cooling rate, solvent nature and heating process, on the morphology and size of the products have been discussed. We believe that this general route and some other proper reversible processes between solid state and solution state can be extended to the transformations from various bulk materials into nanosized materials with various morphologies.
开发了一种通用且无模板的“歧化与反转”路线，可直接从碲或/和硒粉末合成碲、硒及硒-碲合金的一维（1D）纳米结构。通过X射线衍射（XRD）、透射电子显微镜（TEM）、选区电子衍射（SAED）和扫描电子显微镜（SEM）对产物进行了表征。制备出了宽度约为40纳米至约300纳米的碲纳米棒和纳米线、宽度为60 - 100纳米且长度为4 - 6微米的硒纳米线，以及x在较宽范围内、宽度为30 - 70纳米且长径比为三到五的SexTe100-x合金纳米棒。讨论了纳米棒和纳米线的形成机制以及诸如溶液浓度、冷却速率、溶剂性质和加热过程等实验条件对产物形态和尺寸的影响。我们认为，这种通用路线以及固态与溶液态之间的其他一些适当的可逆过程可以扩展到将各种块状材料转变为具有各种形态的纳米材料。
