Adsorption kinetic process of thiol ligands on gold nanocrystals
文献类型：期刊论文
| 作者 | Cheng, H; Yang, LN; Jiang, Y; Huang, YY; Sun, ZH; Zhang, J; Hu, TD; Pan, ZY; Pan, GQ; Yao, T |
| 刊名 | NANOSCALE
 |
| 出版日期 | 2013 |
| 卷号 | 5期号:23页码:11795-11800 |
| 英文摘要 | Understanding the kinetic mechanism during ligand adsorption on gold nanocrystals is important for designing and fine-tuning their properties and implications. Here, we report a kinetic study on the adsorption process of dodecanethiol ligands on Au nanocrystals of 3.3 nm by an in situ time-resolved X-ray absorption fine structure technique. A two-step process of dodecanethiol adsorption on Au NC surfaces is proposed based on the obtained ligand coverage, which shows a quick increase from 0 to 0.40 within the first 20 min, followed by a much slower increase to the limiting value of 0.94. In-depth analysis suggests that the first stage involves the quick adsorption of dodecanethiol to the corner and edge sites of Au NCs surfaces, leading to remarkable surface Au-Au bond length relaxation (from 2.79 to 2.81 angstrom) and pronounced gold-to-ligand charge transfer. The second step that corresponds to the much slower adsorption process to the surface facets could be described by the Langmuir kinetics equation with an adsorption rate constant of 0.0132 min(-1) and an initial coverage of 0.41, in good agreement with the initially preferable adsorption of thiols to the most favorable sites. |
| 学科主题 | Chemistry; Science & Technology - Other Topics; Materials Science; Physics |
| 收录类别 | SCI |
| WOS记录号 | WOS:000326982000056 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224336]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Cheng, H,Yang, LN,Jiang, Y,et al. Adsorption kinetic process of thiol ligands on gold nanocrystals[J]. NANOSCALE,2013,5(23):11795-11800. |
| APA | Cheng, H.,Yang, LN.,Jiang, Y.,Huang, YY.,Sun, ZH.,...&胡天斗.(2013).Adsorption kinetic process of thiol ligands on gold nanocrystals.NANOSCALE,5(23),11795-11800. |
| MLA | Cheng, H,et al."Adsorption kinetic process of thiol ligands on gold nanocrystals".NANOSCALE 5.23(2013):11795-11800. |
入库方式： OAI收割
来源：高能物理研究所
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