• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Surface charge driven size evolution during the formation of self-assembled nanostructures from discrete hydrophilic silver nanoparticles
【24h】

Surface charge driven size evolution during the formation of self-assembled nanostructures from discrete hydrophilic silver nanoparticles

机译：由离散的亲水性银纳米粒子形成自组装纳米结构期间，表面电荷驱动的尺寸演化

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

We investigate the spontaneous evolution of mercaptosuccinic acid-capped silver nanoparticles (MSA-Ag) of size 2.5 +/- 1.0 nm during the formation of assembled nanostructures at the air/water interface. In the phase transfer approach induced by the cationic surfactant cetyltrimethylammonium bromide ( CTAB), the fusion among MSA-Ag nanoparticles is notably accelerated owing to the formation of a CTA-MSA bilayer on the particle surface. Provided that the size-selective separation is carried out in advance for these polydisperse MSA-Ag nanoparticles, either a unitary or a binary orderly superlattice composed of evolved nanoparticles is obtained at the air/water interface. For self-corrective equilibrium growth by adjusting the pH value of the bulk solution through the diffusion of HCl vapor, a competition is found between the superlattice formation and the size growth. The possible size evolution mechanism of each method is proposed. This work also shows that controllable evolution is a useful approach to prepare nanostructures with structural diversity.
机译：我们研究了在空气/水界面处组装的纳米结构形成过程中，巯基琥珀酸封端的银纳米颗粒（MSA-Ag）的自发演化，其尺寸为2.5 +/- 1.0 nm。在由阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）诱导的相转移方法中，由于在颗粒表面形成了CTA-MSA双层，明显加快了MSA-Ag纳米颗粒之间的融合。假设对于这些多分散的MSA-Ag纳米颗粒预先进行了尺寸选择分离，则在空气/水界面处可获得由析出的纳米颗粒组成的单一或二元有序超晶格。对于通过HCl蒸气的扩散来调节本体溶液的pH值的自校正平衡生长，在超晶格形成和尺寸增长之间存在竞争。提出了每种方法可能的尺寸演化机制。这项工作还表明，可控的演化是制备具有结构多样性的纳米结构的有用方法。

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