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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (12): 2013-2015. 上一篇    下一篇

研究论文

DNA分子在气液界面的组装相变特性及其LB膜结构研究

戴树玺;张兴堂;杜祖亮;党鸿辛   

  1. 中国科学院兰州化学物理研究所;河南大学
  • 发布日期:2003-12-15

Studies on Interfacial Properties of DNA Langmuir Monolayers at Air/Water Interface and Structural Properties of DNA LB Films

Dai Shuxi;Zhang Xingtang;Du Zuliang;Dang Hongxin   

  1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences;Key Laboratory of Special Functional Materials, Henan University
  • Published:2003-12-15

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710

被引次数

40 | 3

对十八胺与DNA在气液界面上组装及其相变过程进行了研究，利用AFM观察了不 同压力下转移的DNA复合LB膜结构。发现在低表面压时，DNA复合单分子膜表现为技 术发散的分形结构；随着压力的升高，DNA复合膜逐渐由紧密的网状排布结构变为 团聚的块状和团簇结构。表明通过调节膜压，可使膜内DNA分子的构象发生大的变 化，从而生成具有特定形态的二维纳米图案。这种具有特殊形态和结构的DNA LB膜 可望为合成新型生物纳米结构有序功能体系提供模板。

关键词: 十八胺, 脱氧核糖核酸, 相变, 原子力显微镜, LB膜

Interfacial properties and organization process of DNA/octadecylamine (ODA) mixed Langmuir monolayers at die air/water interface were investigated. The morphology and structure of transferred DNA/ODA mixed LB film were observed using AFM. It was found that fractal domains appeared in the mixed films at low surface pressure. At higher pressure, the domain changed from network structure to aggregated clusters. Several kinds of DNA LB films with patterned surfaces and specific structures were prepared. It provides a good template for the fabrication of complex nanoscale devices.

Key words: octadecylamine, DNA, PHASE TRANSFORMATION, AFM, Langmuir-Blodgett FILMS

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