| 光响应性超疏水偶氮苯自组装多层膜的制备及性质研究 |
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| 引用本文： | 姜武辉,王国杰,和亚宁,安永林,王晓工,宋延林,江雷.光响应性超疏水偶氮苯自组装多层膜的制备及性质研究[J].高等学校化学学报,2005,26(7):1360-1362. |
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| 作者姓名： | 姜武辉 王国杰 和亚宁 安永林 王晓工 宋延林 江雷 |
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| 作者单位： | 1. 大连理工大学化工学院,大连116023;
2. 中国科学院化学研究所分子科学中心,北京100080;
3. 清华大学化学工程系,材料科学与工程研究院,北京100084 |
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| 摘 要： | 近年来,偶氮苯类化合物的光学顺反异构现象已引起人们的广泛关注1~7].在紫外光照射下,偶氮苯由反式结构转变为顺式结构,引起分子的偶极矩发生变化,导致分子的吸收光谱、尺寸及表面能等均发生变化7].偶氮苯表面能的改变可引起其表面浸润性发生变化.据文献1~4]报道,偶氮苯膜在紫外光照射前后接触角最大改变了11°.浸润性是固体表面的一个重要特性,主要受固体表面的化学组成和微观几何结构(粗糙度)影响8~11].通常,与水的接触角大于150°的表面称为超疏水表面;而与水的接触角小于5°的表面称为超亲水表面.本文以2-(4-偶氮苯基苯氧基)丙烯酸…
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| 关 键 词： | 层层自组装 偶氮苯 超疏水性 浸润性 |
| 文章编号： | 0251-0790(2005)07-1360-03 |
| 收稿时间： | 2005-03-08 |
Properties of Photo-responsive Superhydrophobic Azobenzene Multilayers Fabricated by Electrostatic Self-assembly |
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| JIANG Wu-Hui,WANG Guo-Jie,HE Ya-ning,AN Yong-lin,WANG Xiao-gong,SONG Yan-Lin,JIANG Lei.Properties of Photo-responsive Superhydrophobic Azobenzene Multilayers Fabricated by Electrostatic Self-assembly[J].Chemical Research In Chinese Universities,2005,26(7):1360-1362. |
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| Authors: | JIANG Wu-Hui WANG Guo-Jie HE Ya-ning AN Yong-lin WANG Xiao-gong SONG Yan-Lin JIANG Lei |
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| Institution: | 1. College of Chemistry, Dalian University of Technology, Dalian 116024, China;
2. Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
3. Department of Chemical Engineering, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Azobenzene multilayers were fabricated on silicon substrates by electrostatic self-assembly technology. Rough silicon substrates were prepared by photolithography and the inductive coupling plasma deep etching technique. Surface morphology and properties of azobenzene multilayer on the silicon substrate were characterized by SEM, UV-Vis spectra and contact angle(CA) measurement. Superhydrophobicity(CA is larger than 150°) on the multilayer was obtained by introducing geometrical structure onto the substrate surface. For the flat silicon substrate, CA on 10 bilayers was 83.4°±2.1°. For the rough substrate, CA was 150.9°±1.7°. After UV irradiation the CA decreased. A large reversible CA change about 37° was realized through ultraviolet and visible irradiation on the rough azobenzene film, comparing with that about 5° on the flat film. These results indicate that the surface roughness plays an important role in tuning surface wettability. Moreover, the reversible switching by photo-irradiation could be realized many times, and a good reversibility of surface wettability was observed. |
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| Keywords: | Layer-by-layer self-assembly Azobenzene Superhydrophobicity Wettability |
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