Li Peng, Wang Leyu, Wang Lun, Li Yadong
Department of Chemistry, Tsinghua University, Beijing, 100084 (PR China).
Chemistry. 2008;14(19):5951-6. doi: 10.1002/chem.200701958.
A variety of nearly monodisperse semiconductor nanocrystals, such as CdS, ZnS, and ZnS:Mn, with controllable aspect ratios have been successfully prepared through a facile synthetic process. These as-prepared nanocrystals were obtained from the reactions between metal ions and thioacetamide by employing octadecylamine or oleylamine as the surfactants. The effects of reaction temperature and time, ratios of thioacetamide to inorganic precursors, and the reactant content on the size and crystal purity of the nanorods, have been systematically investigated. The optical properties and the formation mechanism of the nanorods have also been discussed. For the next biolabel applications, these hydrophobic nanocrystals have also been transferred into hydrophilic colloidal spheres by means of an emulsion-based bottom-up self-assembly approach.
通过一种简便的合成工艺，已成功制备出多种具有可控纵横比的近单分散半导体纳米晶体，如硫化镉、硫化锌和硫化锌：锰。这些制备好的纳米晶体是通过金属离子与硫代乙酰胺之间的反应，以十八胺或油胺作为表面活性剂获得的。系统研究了反应温度和时间、硫代乙酰胺与无机前驱体的比例以及反应物含量对纳米棒尺寸和晶体纯度的影响。还讨论了纳米棒的光学性质和形成机理。对于接下来的生物标记应用，这些疏水性纳米晶体还通过基于乳液的自下而上自组装方法被转移到亲水性胶体球中。
