| 单分散水溶性金纳米团簇的制备及表征 | |
| Preparation and Characterization of Monodispersed and Water-Soluble Gold Nano-Clusters | |
| 摘要: 采用改进的Brust方法,用硼氢化钠还原氯金酸,并以巯基丁二酸(MSA)、氮乙酰基半光胺酸(NAC)作为包裹剂,成功制备了单分散的水溶性金纳米团簇。高分辨透射电镜(HRTEM)结果表明,增大硫醇与氯金酸的比例并增加氯金酸的初始浓度,有利于得到尺寸更小的金纳米粒子。当氯金酸的浓度(CAu)为9.3 mmol·L-1,CAu:CS为1:30时,得到了直径约为1 nm、标准偏差为0.2 nm的Au@MSA纳米团簇。结合紫外(UV)、热重(TG)和X射线光电子能谱(XPS)分析结果,可以推测出单分散金纳米簇的化学式为[Au38(MSANa)26]或[Au39(MSANa)27]。 | |
| 关键词: 金纳米团簇 纳米粒子 单分散 巯基丁二酸 | |
| 基金项目: 浙江省高校重中之重学科开放基金(N0.2013YXQN04)资助项目。 | |
| Abstract: Monodispersed water-soluble gold nano-clusters were prepared by using sodium borohydride to reduce tetrachloroauric acid in methanol, with water-soluble 2-mercaptosuccinic acid as the protecting agent on gold nano-cluster surface. HRTEM results show that MSA monolayer-protected gold clusters were obtained with size of about 10.2 nm by increasing the proportion of 2-mercaptosuccinic acid and concentration of tetrachloroauric acid with CAu:CS=1:30. TG, UV and XPS results show that the possible chemical formula of the synthesized gold nano-clusters is [Au38(MSANa)26] or [Au39(MSANa)27]. | |
| Keywords: gold nano-clusters nanoparticles monodisperse 2-mercaptosuccinic acid | |
| 投稿时间：2015-04-10 修订日期：2015-06-03 | |
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| 张明,王帅帅,朱罕,杜明亮.单分散水溶性金纳米团簇的制备及表征[J].无机化学学报,2015,31(10):2015-2020. | |
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