高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (11): 1738.

• 论文 • 上一篇    下一篇

化学力显微镜对ω-巯基正十一胺自组装单分子膜的力滴定研究

傅强, 张华, 何会新, 刘忠范   

  1. 北京大学化学与分子工程学院, 纳米科学与技术研究中心 北京 100871
  • 收稿日期:2000-03-14 出版日期:2000-11-24 发布日期:2000-11-24
  • 通讯作者: 刘忠范(1962年出生),男,博士,教授,博士生导师,从事纳米化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29973001)资助

Force Titration of ω-Mercapto-n-undecylamine Self-assembled Monolayers by Chemical Force Microscopy

FU Qiang, ZHANG Hua, HE Hui-Xin, LIU Zhong-Fan   

  1. College of Chemistry and Molecular Engineering, Center for Nanoscale Science and Technology, Peking University, Beijing 100871, China
  • Received:2000-03-14 Online:2000-11-24 Published:2000-11-24

摘要: 采用化学力显微术(CFM)研究了一种长链氨基自组装单分子膜的力滴定性质,考察了表面基团性质不同的力探针对力滴定的影响;测定了金包覆的Si3N经—OH和—NH2基功能化的金样品之间的粘滞力,得到了作为溶液pH值函数的粘滞力曲线(力滴定曲线).结果表明,—NH2和—OH基功能化的表面pK1/2分别为8.4和9.0.

关键词: 原子力显微术, 化学力显微术, 力滴定, 自组装膜, 粘滞力

Abstract: Chemical force microscopy(CFM) was used to measure the adhesion forces between Au coated Si3N4 tip functionalized with —OH and —NH2 groups and gold sample functionalized with —NH2 groups. The curves of the adhesion force as the function of the solution pH values(force titration curve) was obtained. The pK1/2 of surface —NH2 groups estimated from the force titration curve is 8.4 by —OH functionalized tip and 9.0 by —NH2 functionalized tip.

Key words: Atomic force microscopy, Chemical force microscopy, Force titration, Self-assembled monolayers, Adhesion force

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