• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Forces between surfactant-coated ZnS nanoparticles in dodecane: Effect of water
【24h】

Forces between surfactant-coated ZnS nanoparticles in dodecane: Effect of water

机译：十二烷中表面活性剂涂覆的ZnS纳米颗粒之间的作用力：水的影响

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

The forces between mica surfaces confining solutions of spherical and rod-shaped ZnS nanoparticles (diameter ca. 5 nm) coated with hexadecylamine or octadecylarnine surfactant in dodecane have been measured in the absence and after the introduction of trace amounts of water. Initially, or at very low water content, the water molecules cause the nanoparticles to aggregate and adsorb on the hydrophilic mica surfaces, resulting in a long-range exponentially decaying repulsive force between the surfaces. After longer times (> 20 h), water bridges nucleate and grow between the nanoparticles and mica surfaces, and attractive capillary forces then cause a long-range attraction and a strong (short-range) adhesion. It is found, as has previously been observed in nonaqueous bulk colloidal systems, that even trace amounts of water have a profound effect on the interactions and structure of nanoparticle assemblies in thin films, which in turn affect their physical properties. These effects should be considered in the design of thin-film processing methodologies.
机译：在不存在或引入痕量水之后，已测量了在十二烷中涂覆有十六烷基胺或十八烷基萘表面活性剂的球形和棒状ZnS纳米颗粒（直径约5 nm）的云母表面封闭溶液之间的力。最初或在非常低的水分含量下，水分子使纳米颗粒聚集并吸附在亲水性云母表面上，从而导致表面之间的远距离指数衰减排斥力。在更长的时间（> 20小时）之后，水在纳米颗粒和云母表面之间形成核桥并生长，然后有吸引力的毛细作用力会引起长距离吸引和强（短距离）粘附。正如以前在非水体胶体系统中观察到的那样，发现即使是痕量的水也对薄膜中纳米颗粒组件的相互作用和结构产生深远影响，进而影响其物理性能。在设计薄膜处理方法时应考虑这些影响。

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