Journal
NANO RESEARCH
Volume 1, Issue 3, Pages 213-220Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-008-8024-5
Keywords
Crystal growth; hierarchical; nanostructures; kinetics
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Funding
- NSFC [90406018]
- Ministry of Science and Technology (MOST) of China [2007CB936202]
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A very simple strategy for preparing hierarchical inorganic nanostructures under ambient aqueous conditions is presented. The hierarchical inorganic nanomaterials were obtained by simply adding a highly concentrated solution of one reactant to a solution of another reactant with low concentration. No surface-capping molecules or structure-directing templates were needed. The preparation of hierarchical single crystalline PbMoO(4) was used as an example in order to study the effects of varying the reaction conditions and the mechanism of the process. It was found that the large concentration difference (typically in excess of 200-fold) and the concentration gradient of the reactants both play key roles in controlling the diffusion process and the morphology of the resulting nanostructures. This kinetically controlled strategy is facile and is easily adapted to prepare a variety of inorganic materials.
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