Self-Assembly of Bi2WO6 Square Nanoplates into Hierarchical Structures
Bi2WO6 hierarchical structures constructed by a number of square nanoplates of average ∼70 nm in side length and ∼25 nm in thickness have been synthesized by a hydrothermal method at 180 °C. The single-crystal subunit nanoplates with (002) as their two-dimensional (2D) surfaces assembled orderly using both their edges and faces into free-standing films. It was found that the self-assembled growth of these hierarchical structures strongly depended on surfactant Cetyl Trimethyl Ammonium Bromide (CTAB), the amounts of the starting materials and the molar ratio of precursors (Bi3 + to WO2− 4), etc. The growth mechanism was discussed based on the comparative experimental results.
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Document Type: Research Article
Publication date: February 1, 2009
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