HAuCl4: A dual agent for studying the chloride-assisted vertical growth of citrate-free Ag nanoplates with Au serving as a marker | |
Zhang, Jia ; Liu, Jingyue ; Xie, Zhao-Xiong ; Qin, Dong ; Xie ZX(谢兆雄) | |
刊名 | http://dx.doi.org/10.1021/la5035728 |
2014 | |
关键词 | Ascorbic acid Chlorine compounds Geometry Growth rate Ions Nanostructures |
英文摘要 | We have investigated the vertical growth of citrate-free Ag nanoplates into truncated right bipyramids and twinned cubes with truncated corners in the presence of Cl- ions at low and high concentrations, respectively, with Au serving as a marker for electron microscopy analysis. Both the Cl- ions and Au atoms could be introduced through the use of HAuCl4 as a dual agent. When HAuCl4 was added into an aqueous mixture of citrate-free Ag nanoplates, ascorbic acid (AA), and poly(vinylpyrrolidone), Au would be immediately formed and deposited on the surfaces of the nanoplates due to the reduction by both Ag and AA. The deposited Au could be easily resolved under STEM to reveal the growth patterns of the nanoplates. We found that the presence of Au did not change the growth pattern of the original Ag nanoplates. In contrast, the Cl- ions could deterministically direct the formation of Ag nanoplates with a triangular or hexagonal shape, followed by their further growth into truncated right bipyramids or twinned cubes with truncated corners upon the introduction of AgNO3. This work demonstrates, for the first time, that citrate-free Ag nanoplates could be transformed into right bipyramids or twinned cubes by controlling a single experimental parameter: the concentration of Cl- ions in the growth solution. The mechanistic understanding represents a step forward toward the rational design and shape-controlled synthesis of nanocrystals with desired properties. |
语种 | 英语 |
出版者 | American Chemical Society |
内容类型 | 期刊论文 |
源URL | [http://dspace.xmu.edu.cn/handle/2288/89720] |
专题 | 化学化工-已发表论文 |
推荐引用方式 GB/T 7714 | Zhang, Jia,Liu, Jingyue,Xie, Zhao-Xiong,et al. HAuCl4: A dual agent for studying the chloride-assisted vertical growth of citrate-free Ag nanoplates with Au serving as a marker[J]. http://dx.doi.org/10.1021/la5035728,2014. |
APA | Zhang, Jia,Liu, Jingyue,Xie, Zhao-Xiong,Qin, Dong,&谢兆雄.(2014).HAuCl4: A dual agent for studying the chloride-assisted vertical growth of citrate-free Ag nanoplates with Au serving as a marker.http://dx.doi.org/10.1021/la5035728. |
MLA | Zhang, Jia,et al."HAuCl4: A dual agent for studying the chloride-assisted vertical growth of citrate-free Ag nanoplates with Au serving as a marker".http://dx.doi.org/10.1021/la5035728 (2014). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论