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Fabrication of 3D Hierarchical Structures
|Muhammet S. Toprak 1, Maria Mikhaylova 1, Yun-Suk Jo 1, Do Kyung Kim , Mamoun Muhammed 1|
1. Royal Institute of Technology, Dept of Materials Science and Engineering, Materials Chemistry Division (KTH), Brinellvaegen 23, 2tr., Stockholm SE10044, Sweden
Conventional methods of preparing macroporous metal oxides involve mixing the particles with some type of binder. Because of nonuniformity in particle size, it is often difficult to control the shape of the pores, and consequently a low porosity with a broad size distribution is obtained. Templating methods provide an alternative approach to fabricate macroporous solids. Recently developed colloidal crystal templating techniques have permitted chemical preparations of macroporous materials having three-dimensionally ordered arrays of pores with diameters from tens to hundreds of nanometers. Macroporous inverse opal structures, templated from opals, have different optical and magnetic properties from the bulk material they are formed. Properties of these materials can be tuned through the control of the opal periodicity. An inverted opal can be envisaged as the negative replica of an opal with a periodic distribution of interconnected spherical cavities.
Presentation: poster at E-MRS Fall Meeting 2003, Symposium F, by Muhammet S. Toprak
See On-line Journal of E-MRS Fall Meeting 2003
Submitted: 2003-05-27 19:39 Revised: 2009-06-08 12:55