Department of Chemistry and Laboratory for Emerging Materials and Technology, Clemson University, Clemson, SC 29634-0973, USA.
ACS Appl Mater Interfaces. 2009 Mar;1(3):703-9. doi: 10.1021/am800209m.
The wet-chemical synthesis of aluminum nanoparticles was investigated systematically by using dimethylethylamine alane and 1-methylpyrrolidine alane as precursors and molecules with one or a pair of carboxylic acid groups as surface passivation agents. Dimethylethylamine alane was more reactive, capable of yielding well-defined and dispersed aluminum nanoparticles. 1-Methylpyrrolidine alane was less reactive and more complex in the catalytic decomposition reaction, for which various experimental parameters and conditions were used and evaluated. The results suggested that the passivation agent played dual roles of trapping aluminum particles to keep them nanoscale during the alane decomposition and protecting the aluminum nanoparticles postproduction from surface oxidation and that an appropriate balance between the rate of alane decomposition (depending more sensitively on the reaction temperature) and the timing in the introduction of the passivation agent into the reaction mixture was critical to the desired product mixes and/or morphologies. Some fundamental and technical issues on the alane decomposition and the protection of the resulting aluminum nanoparticles are discussed.
采用二乙胺基氢化铝和 1-甲基吡咯烷基氢化铝作为前驱体，以具有一个或一对羧酸基团的分子作为表面钝化剂，系统地研究了铝纳米粒子的湿法化学合成。二乙胺基氢化铝的反应活性更高，能够生成形貌均一、分散良好的铝纳米粒子。1-甲基吡咯烷基氢化铝的反应活性较低，催化分解反应也较为复杂，因此使用和评估了各种实验参数和条件。结果表明，钝化剂在氢化铝分解过程中起到了双重作用，既能捕获铝颗粒使其保持纳米级，又能防止铝纳米颗粒在生产后发生表面氧化；此外，氢化铝分解的速率（对反应温度更为敏感）和将钝化剂引入反应混合物的时机之间需要达到适当的平衡，这对所需的产物混合物和/或形貌至关重要。本文还讨论了氢化铝分解和保护所生成的铝纳米粒子的一些基本和技术问题。
