• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Growth pathways of silver nanoplates in kinetically controlled synthesis: bimodal versus unimodal growth
【24h】

Growth pathways of silver nanoplates in kinetically controlled synthesis: bimodal versus unimodal growth

机译：动力学控制合成中银纳米板的生长途径：双峰与单峰生长

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Silver nanoplates were synthesized by reducing silver nitrate (AgNO3) with poly(vinyl pyrrolidone) (PVP) in N, N-dimethylformamide (DMF). In the synthesis, the hydroxyl end groups of the PVP served as a mild reductant in the kinetically controlled synthesis, and DMF played a critical role as a reaction medium (solvent) for the formation and growth of the nanoplates. In the present study, the growth of the nanoplates proceeded along different pathways, as evidenced by variations in the shape evolution, depending on the PVP to AgNO3 weight ratio. When the concentration of PVP is below a certain value, a large number of small nanoplates with different sizes were initially formed and then fused together along their lateral planes, leading to the formation of a secondary large nanoplate (bimodal particle growth). When the PVP concentration became higher and the surface capping was enhanced, the small nanoplates continued to grow individually without fusing (unimodal particle growth). This study not only advanced our understanding of the role played by PVP in the kinetically controlled synthetic reaction but also allows us to produce Ag nanoplates with a high aspect ratio in a single step.
机译：通过在N，N-二甲基甲酰胺（DMF）中用聚乙烯吡咯烷酮（PVP）还原硝酸银（AgNO3）合成银纳米板。在合成过程中，PVP的羟基端基在动力学控制的合成过程中充当轻度还原剂，而DMF在形成和生长纳米板的反应介质（溶剂）中起着关键作用。在本研究中，纳米板的生长沿着不同的途径进行，这取决于形状演变的变化，这取决于PVP与AgNO3的重量比。当PVP的浓度低于一定值时，首先形成大量具有不同尺寸的小纳米板，然后沿它们的侧面融合在一起，导致形成第二大纳米板（双峰颗粒生长）。当PVP浓度变高且表面覆盖度提高时，小纳米板继续单独生长而不发生融合（单峰颗粒生长）。这项研究不仅增进了我们对PVP在动力学控制的合成反应中所起的作用的理解，而且使我们能够一步一步生产出具有高纵横比的Ag纳米板。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号