...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Relaxation Dynamics and Transient Behavior of Small Arenethiol Passivated Gold Nanoparticles
【24h】

Relaxation Dynamics and Transient Behavior of Small Arenethiol Passivated Gold Nanoparticles

机译：槟榔小钝化金纳米粒子的弛豫动力学和瞬态行为

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

Novel gold nanoparticles,passivated by monolayers of benzenethiol,biphenylthiol,and similar derivatives,have been synthesized and characterized using UV/vis,NMR,and Fourier transform infrared (FTIR) spectroscopies.The nanoparticle sizes have been evaluated using transmission electron microscopy and UV/vis spectroscopy;they show diameters between 2.1 and 4.7 nm,depending on the method of synthesis and the monolayer protecting group.Femtosecond transient absorption measurements show that the nanoparticles possess optical properties on the boundary between molecular and nanoparticle behavior.The smaller systems based on benzenethiol exhibit long-lived excited states with lifetimes on the order of a few nanoseconds,resembling those of small gold molecular type clusters.The larger nanoparticles protected with biphenylthiol and benzylthiol groups relax much more rapidly on a picosecond time scale,similarly to related citrate stabilized systems reported in the literature.
机译：通过紫外/可见光，核磁共振和傅立叶变换红外（FTIR）光谱法合成并表征了被苯硫醇，联苯硫醇和类似衍生物单层钝化的新型金纳米颗粒。已使用透射电子显微镜和UV /可见光谱;取决于合成方法和单层保护基团，它们的直径在2.1至4.7 nm之间。飞秒瞬态吸收测量表明，纳米颗粒在分子和纳米颗粒行为之间的边界上具有光学性质。较小的系统基于苯硫醇表现出长寿命的激发态，其寿命在几纳秒的数量级，类似于小金分子类型的团簇。受联苯硫醇和苄硫醇保护的较大纳米颗粒在皮秒级的时间里松弛得更快，类似于相关的柠檬酸盐稳定体系文献报道。

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