简单地纯化超细金纳米线的方法:溶剂排除法
Facile purification of ultrathin Au nanowires:A solvent exclusion method
杨倩 1王若徐 2程雪君 1陈虹宇2
作者信息
- 1. Department of Chemistry,Zhejiang University,Hangzhou 310058,China;Department of Chemistry,School of Science,Westlake University,Hangzhou 310024,China;Institute of Natural Sciences,Westlake Institute for Advanced Study,Hangzhou 310024,China
- 2. Department of Chemistry,School of Science,Westlake University,Hangzhou 310024,China;Institute of Natural Sciences,Westlake Institute for Advanced Study,Hangzhou 310024,China
- 折叠
摘要
在超细Au纳米线的合成过程中常伴随着2 nm Au纳米颗粒这一副产物,两者如何分离是长期存在的问题.本研究通过使用溶剂排除法实现了高纯度(＞99％)分离:加入正己烷会导致水从最初的水-THF混合物中被排除.被排除的水优先在纳米线表面吸附的油胺双分子层上成核,从而将纳米线转移到水相中.本文通过仔细地对照实验建立了纯化机理.这种简便的方法可以用于传统方法无法实现的短的超细金纳米线(470和130 nm)的纯化.
Abstract
Ultrathin Au nanowires are always synthesized with 2 nm Au nanoparticles as the by-product,and their se-paration has been a long-standing problem.In this work,we show that high-purity(＞99％)separation can be achieved using the solvent exclusion method:Adding hexane would cause water to be excluded from the initial water-THF mixture.The excluded water preferentially nucleates on the oleylamine-bilayer of the nanowires,transferring them into the water phase.Careful control experiments were conducted to estab-lish the purification mechanism.The facile method can be generally applied to purify ultrathin Au nanowires with short lengths(470 and 130 nm),which has not been realized using the conventional methods.
关键词
ultrathin Au nanowire/phase separation/separation/purification/solvent exclusionKey words
ultrathin Au nanowire/phase separation/separation/purification/solvent exclusion引用本文复制引用
基金项目
国家自然科学基金(91956109)
浙江省自然科学基金(2022XHSJJ002)
Hangzhou Municipal Funding,Team of Innovation(TD2022004)
Foundation of Westlake University()
Westlake University Instrumentation and Service Center for Molecular Sciences for the facility support and technical assistance()
出版年
2024
NETL
NSTL
万方数据