| DNA分子在气液界面的组装相变特性及其LB膜结构研究 |
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| 引用本文： | 戴树玺,张兴堂,杜祖亮,党鸿辛. DNA分子在气液界面的组装相变特性及其LB膜结构研究[J]. 化学学报, 2003, 61(12): 2013-2015 |
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| 作者姓名： | 戴树玺 张兴堂 杜祖亮 党鸿辛 |
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| 作者单位： | 中国科学院兰州化学物理研究所,固体润滑国家重点实验室,兰州,730000;河南大学特种功能材料重点实验室,开封,475001;河南大学特种功能材料重点实验室,开封,475001 |
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| 基金项目： | 国家自然科学基金 (No.2 9971 0 0 8),河南省杰出人才创新基金资助项目 |
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| 摘 要： | 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。
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| 关 键 词： | LB技术 DNA薄膜 表面图案化 扫描探针显微镜(SPM) |
| 修稿时间： | 2003-05-12 |
Studies on Interfacial Properties of DNA Langmuir Monolayers at Air/Water Interface and Structural Properties of DNA LB Films |
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| DAI,Shu-Xi a,b ZHANG,Xing-Tang b DU,Zu-Liang,b DANG,Hong-Xin a,b. Studies on Interfacial Properties of DNA Langmuir Monolayers at Air/Water Interface and Structural Properties of DNA LB Films[J]. Acta Chimica Sinica, 2003, 61(12): 2013-2015 |
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| Authors: | DAI Shu-Xi a b ZHANG Xing-Tang b DU Zu-Liang b DANG Hong-Xin a b |
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| Affiliation: | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences;Key Laboratory of Special Functional Materials, Henan University |
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| Abstract: | Interfacial properties and organization process of DNA/octadecylamine (ODA) mixed Langmuir monolayers at the 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. |
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| Keywords: | Langmuir-Blodgett technique DNA film surface patterning scanning probe microscopy (SPM) |
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