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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (Supplement 2): 345-349    DOI: 10.1631/jzus.2006.AS0345
Original Paper     
Preparation of movable 3D periodic structures of silica spheres
Li Wen-Jiang, Fu Tao
Joint Research Center of Photonics of the Royal Institute of Technology and Zhejiang University, Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
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Abstract  Monodispersed silica spheres were prepared by hydrolysis of tetraethyl orthosilicate (TEOS) in the presence of water and ammonia in ethanol medium. The net negative charge on the surface of SiO2 spheres was enhanced after ageing silica spheres under suitable condition. Thus, a novel viscous liquid composed of mono-dispersed silica spheres was obtained. Due to the existing net repulsive forces between particles, the viscous liquid can quickly form a movable 3D periodic ordered structure with vivid color, indicating a high degree of ordering of the particles.

Key words： Silica spheres      Three-dimensional      Colloidal     
Received: 20 November 2005     
CLC:  O343.2  
  O753  
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Li Wen-Jiang, Fu Tao. Preparation of movable 3D periodic structures of silica spheres. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(Supplement 2): 345-349.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.AS0345     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/ISupplement 2/345

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