Adsorption kinetic process of thiol ligands on gold nanocrystals
Cheng, H; Yang, LN; Jiang, Y; Huang, YY; Sun, ZH; Zhang, J; Hu, TD; Pan, ZY; Pan, GQ; Yao, T; Bian, Q; Wei, SQ;张静; Hu TD(胡天斗)
刊名NANOSCALE
2013
卷号5期号:23页码:11795-11800
学科分类Chemistry; Science & Technology - Other Topics; Materials Science; Physics
DOI10.1039/c3nr04020h
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.
收录类别SCI
WOS记录号WOS:000326982000056
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224336
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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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.
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