Nano Archive

A general chemical conversion route to synthesize various ZnO-based core/shell structures

Zhu, Y. F. and Fan, A. H. and Shen, W. Z. (2008) A general chemical conversion route to synthesize various ZnO-based core/shell structures. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (28). pp. 10402-10406.

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Core/shell structures often exhibit improved physical and chemical properties. Developing a relatively general, facile, and low temperature synthetic approach for semiconductor core/shell structures with complex compositions is still a particularly challenging work. Here we report a general chemical conversion route to prepare high quality ZnO-based core/shell (ZnO/ZnS, ZnO/Ag2S, and ZnO/CuS) microspheres using inexpensive and commercially available reagents. The key to the success of our strategy lies in the use of reactive templates to realize the synthesis of various ZnO-based core/shell structures. The yielded core/shell nanostructures were confirmed by transmission electron microscopy, energy-dispersive X-ray analysis, and X-ray diffraction measurements. Photoluminescence of the ZnO/ZnS core/shell microspheres exhibits a distinct enhancement compared with that of the uncoated ZnO microspheres, showing potential application in optoelectronic devices such as ultraviolet light-emitting diodes and diode lasers. The present chemical conversion approach is expected to be employed in a broad range of applications to fabricate innovative semiconductor core/shell structures with different compositions and shapes for unique properties.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:1856
Deposited By:Farnush Anwar
Deposited On:16 Dec 2008 14:21
Last Modified:16 Dec 2008 14:21

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