期刊
MATERIALS LETTERS
卷 63, 期 2, 页码 285-288出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2008.10.012
关键词
Nanomaterials; Crystal growth; Crystallographic morphology; Optical materials and properties
资金
- National Nature Science Fund of China
- 973 project of China [2005CB623601]
In this work, hierarchical PbWO4 spheres assembled by nanorods were successfully synthesized through a tri-potassium citrate assisted hydrothermal process. The samples were studied by powder X-ray diffraction pattern (XRD), field scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It was found that citrate played a key role on the morphology of PbWO4 products. By adjusting concentration of citrate, PbWO4 octahedrons, hierarchical spheres, hierarchical ellipses Could be obtained. Based on time-dependent experiments, we found the growth of the hierarchical spheres followed a self-assembly process. The most interesting part was that the hierarchical spheres/ellipses showed a blue emission peak at 440 nm. which differs from the typical green one at 500 nm as reported. (c) 2008 Elsevier B.V. All rights reserved.
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