高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (10): 1793.

• 研究论文 • 上一篇    下一篇

Au纳米粒子在有机溶剂中的电导行为

方芳, 王英, 张效岩, 张亚非   

  1. 上海交通大学微纳米科学技术研究院, 薄膜与微细技术教育部重点实验室, 微米/纳米加工技术国家级重点实验室, 上海200030
  • 收稿日期:2004-02-23 出版日期:2004-10-24 发布日期:2004-10-24
  • 基金资助:

    第33批中国博士后科学基金;上海交通大学青年教师校内科研启动基金资助

DC Conductivity of Au Nanoparticles in Organic Solvent

FANG Fang, WANG Ying, ZHANG Xiao-Yan, ZHANG Ya-Fei   

  1. Research Institute of Micro/Nanometer Science and Technology, Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2004-02-23 Online:2004-10-24 Published:2004-10-24

摘要: 采用化学方法制备出粒径约10nm的Au纳米粒子,分别用十二、十四和十六烷基硫醇对Au粒子表面进行修饰,再溶入不同有机溶剂中,制备得到Au纳米粒子/氯仿和Au纳米粒子/甲苯溶液.测试了不同溶液的电导率随溶质浓度的变化规律,发现在整个浓度范围内存在一个临界浓度值.当溶质浓度低于临界浓度值时,溶液的电导率随溶质浓度的增加而迅速增加;而当溶质浓度超过临界浓度值时,溶液电导率的增加缓慢.在本文测试的浓度范围内,当Au纳米粒子分别被十二、十四和十六烷基硫醇修饰时,Au纳米粒子/氯仿溶液的临界浓度值分别约为11.22,7.96和5.47g/L.在相同浓度下,Au纳米粒子外面包裹的烷基硫醇的链长越短,其溶液的电导率越大.在整个浓度范围内,Au纳米粒子/氯仿溶液的电导率均高于Au纳米粒子/甲苯溶液的电导率.

关键词: Au纳米粒子, 电导率, 氯仿, 甲苯

Abstract: Gold nanoparticles were chemically synthesized with a diameter of about 10 nm. Dodecanethiol, tetradecanethiol and hexadecanethiol were used to protect Au nanoparticles. Then Au nanoparticles/chloroform and Au nanoparticles/toluene suspensions were prepared. DC conductivity of different suspensions was investigated. The electrical conductivity of the samples increased with the increase of the concentration of Au nanoparticles, and a rapid increase in conductivity is observed when the concentration increased from a low value to a moderate value. The conductivity increases slowly when the concentration is larger than the moderate value. The moderate concentration values are11.22, 7.96 and 5.47 g/L in chloroform suspensions when Au nanoparticles were encapsulated by dodecanethiol, tetradecanethiol and hexadecanethiol, respectively. The conductivity for Au nanoparticles/chloroform suspension is higher than that for Au nanoparticles/toluene suspension in the whole concentration range.

Key words: Au nanoparticle, Conductivity, Chloroform, Toluene

中图分类号: 

TrendMD: