| 纳米框诱导的三角形纳米银片合成(英文) |
| Nanoframes Directed Synthesis of Triangular Silver Nanoplates |
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| 摘要: 以二异辛基磺化琥珀酸钠(CAS No.577-11-7，1，4-二(2-乙基己基)丁二酸酯磺酸钠盐Bis(2-ethylhexyl) sulfosuccinate sodium salt, Dioctyl sulfosuccinate sodium salt，AOT)和柠檬酸钠为表面修饰剂，在60 ℃及36~50 h的水浴条件下采用硼氢化钠还原硝酸银合成出高产率形貌规则的三角形纳米银片。通过控制反应条件可以在边长600~400 nm，厚度5~20 nm范围内调控三角形纳米银片尺寸。通过三角形纳米银片合成过程的显微结构表征提出了三角形框诱导的三角形纳米银片融合生长机制。在AOT表面修饰剂作用下，纳米银粒子自组装融合生长形成三角形纳米框。小的纳米银粒子的融合、消耗促进三角形纳米框形成三角形纳米片。AOT浓度、反应时间和溶液pH值等因素的研究进一步表明了在一定的条件下以三角形框形成为基础的三角形纳米银片的融合生长机制。 |
| 关键词: 三角形纳米银片 纳米框 AOT 诱导合成 |
| 基金项目: |
| Abstract: A simple and effective aqueous-phase approach was used for a large-scale synthesis of regular silver triangular nanoplate，which is with a thickness of 5~20 nm and a size tunable from 60 to 400 nm. The standard synthesis process involved the reduction of silver nitrate with sodium borohydride in the presence of sodium citrate and dioctyl sulfosuccinate sodium salt(AOT, CAS No.577-11-7; Bis(2-ethylhexyl) sulfosuccinate sodium salt,) and heat-treatment at 60 ℃ for 36~50 h. The studies of the growth process indicate that the silver triangular nanoframes form in the formation process, serving as templates for triangular nanoplates. The formation process of triangular nanoframes is involved with nanoparticles assembly due to the interaction with AOT. In addition, the heating provides a driving force to facilitate the Ostwald ripening process-growth of these triangular nanoframes at the expense of some nanoparticles and incorporation of nanoparticles. Studies from different AOT concentrations, pH values and reaction time demonstrate that triangular nanoframe-mediated growth mechanism works only in the proper experimental conditions. |
| Keywords: silver nanoplates nanoframes AOT directed synthesis |
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| 王悦辉,张 琦,王 婷,周 济.纳米框诱导的三角形纳米银片合成(英文)[J].无机化学学报,2010,26(3):365-373. |
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