Laboratoire de Chimie de Coordination, CNRS UPR8241, 205 , route de Narbonne, 31077 Toulouse, France.
Langmuir. 2013 Nov 5;29(44):13491-501. doi: 10.1021/la402001t. Epub 2013 Aug 8.
The control of the metallic nanocrystal shape is of prime importance for a wide variety of applications. We report a detailed research work on metal-organic chemical routes for the synthesis of a highly symmetrical crystal structure. In particular, this study shows the key parameters ensuring the anisotropic growth of nickel nanostructures (fcc crystal). Numerous reaction conditions are investigated (precursors, solvents, temperature, reducing agents, reaction time, and types and ratios of surfactants, such as alkyl amines, carboxylic acids, and phosphine oxides), and their effects on the size and shape of the final product are reported. The role of the growth modifiers and the structuring of the reaction media on the anisotropic growth are demonstrated. This metal-organic approach generates several novel anisotropic nanostructures in a wide size range depending on the reaction conditions. In this way, nanomaterials with reproducible size, shape, and composition are obtained with good yield. Transmission electron microscopy techniques (TEM and HRTEM) are the principal methods for monitoring the morphology.
控制金属纳米晶体的形状对于各种应用都非常重要。我们报告了一项关于金属有机化学路线合成高度对称晶体结构的详细研究工作。特别是，这项研究展示了确保镍纳米结构（fcc 晶体）各向异性生长的关键参数。研究了许多反应条件（前体、溶剂、温度、还原剂、反应时间以及表面活性剂的类型和比例，如烷基胺、羧酸和膦氧化物），并报告了它们对最终产物尺寸和形状的影响。证明了生长调节剂的作用和反应介质的结构化对各向异性生长的影响。这种金属有机方法在较宽的尺寸范围内生成了几种新颖的各向异性纳米结构，具体取决于反应条件。通过这种方式，可以获得具有良好收率的尺寸、形状和组成可重复的纳米材料。透射电子显微镜技术（TEM 和 HRTEM）是监测形态的主要方法。
