Synthesis of 3D ordered macroporous indium tin oxide using polymer colloidal crystal template

作     者：ZHANG Xue'ao MAN Yahui WANG Jianfang LIU Changli WU Wenjian 

作者机构：College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2006年第49卷第5期

页      面：537-546页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：template synthesis, polymer colloidal crystal, indium tin oxide, three-dimensional order, macroporous material. 

摘      要：Three-dimensional (3D) ordered macroporous indium tin oxide (ITO) is pre- pared using a polymer colloidal crystal template that is formed by self-assembly of the monodisperse poly(methyl methacrylate) (PMMA) microspheres. The morphologies and BET surface area of the macroporous material is examined by scanning electron micro- scope, transmission electron microscopy and N2 adsorption/desorption. Results indicate that the macroporous material has highly ordered arrays of the uniform pores replicated from the PMMA colloidal crystal template when the polymer colloidal crystal template is removed by calcinations at 500℃. The pore diameter (about 450 nm) of macroporous ITO slightly shrank to the PMMA microspheres. The BET surface area and pore volume of the macroporous material are 389 m2·g-1 and 0.36 cm3·g-1, respectively. Moreover, the macroporous ITO, containing 5 mol% Sn and after annealing under vacuum, shows the minimum resistivity of ρ = 8.2×10-3 Ω· cm. The conductive mechanism of macroporous ITO is discussed, and it is believed that the oxygen vacancies are the major factor for excellent electrical properties.