Fabrication of superhydrophobic AAO-Ag multilayer mimicking dragonfly wings  

作　　者：WANG XiaoJun SONG Wei LI ZhiShi CONG Qian 

机构地区：[1]Key Laboratory for Bionic Engineering of Ministry of Education,Jilin University,Changchun 130025,China [2]School of Chemistry and Life Science,Changchun University of Technology,Changchun 130012,China [3]Key Laboratory of Supramolecular Structure and Materials of Ministry of Education,Jilin University,Changchun 130012,China

出　　处：《Chinese Science Bulletin》2012年第35期4635-4640,共6页

基　　金：supported by the National Natural Science Foundation of China(50875108 and 20903044);the Specialized Research Fund for the Doctoral Program of Higher Education of China(20100061110022);the Open Project Program of Key Laboratory for Bionic Engineering of Ministry of Education

摘　　要：Inspired by the co-coupling of the non-smooth structure and the waxy layer inducing the hydrophobicity of dragonfly wing surface,we developed a simple and versatile method to fabricate a superhydrophobic surface with the dragonfly wing structures.In this work,Ag nanorods grew on highly ordered anodic aluminum oxide(AAO) surface via a galvanic reduction approach.Then the AAO-Ag multilayer was fabricated.Furthermore,the surface free energy of AAO-Ag multilayer was reduced by modifying with perfluorodecanethiol.The modified AAO-Ag multilayer was superhydrophobic and the static contact angle reached as high as 168°.X-ray photoelectron spectra(XPS) were used to characterize the chemical structure of the obtained products.The morphologies of AAO-Ag multilayer was similar to microstructure of dragonfly wing surface and presented hierarchical rough structure.The results showed that the co-coupling of the rough structure and low surface free energy induced the superhydrophobic performance of the AAO-Ag multilayer surface.Inspired by the co-coupling of the non-smooth structure and the waxy layer inducing the hydrophobicity of dragonfly wing surface,we developed a simple and versatile method to fabricate a superhydrophobic surface with the dragonfly wing structures.In this work,Ag nanorods grew on highly ordered anodic aluminum oxide（AAO） surface via a galvanic reduction approach.Then the AAO-Ag multilayer was fabricated.Furthermore,the surface free energy of AAO-Ag multilayer was reduced by modifying with perfluorodecanethiol.The modified AAO-Ag multilayer was superhydrophobic and the static contact angle reached as high as 168°.X-ray photoelectron spectra（XPS） were used to characterize the chemical structure of the obtained products.The morphologies of AAO-Ag multilayer was similar to microstructure of dragonfly wing surface and presented hierarchical rough structure.The results showed that the co-coupling of the rough structure and low surface free energy induced the superhydrophobic performance of the AAO-Ag multilayer surface.

关 键 词：超疏水性表面 AAO 翅膀 蜻蜓 多孔阳极氧化铝 X-射线光电子能谱 银 化学结构 

分 类 号：TB306[一般工业技术—材料科学与工程]