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Ultrason Sonochem. 2010 Feb;17(2):284-7. doi: 10.1016/j.ultsonch.2009.09.010. Epub 2009 Sep 26.

Using sonochemistry for the fabrication of hollow ZnO microspheres.

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1
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China. xhjia2003@126.com

Abstract

Hollow ZnO microspheres assembled by nanoparticles have been prepared by a sonochemical synthesis at room temperature using carbon spheres as template. The growth process of the precursor was investigated. The prepared hollow spheres were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM). The diameter of the obtained hollow spheres is about 500nm, and the walls are composed of numerous ZnO aggregate nanocrystallines with diameters of 90nm. A possible growth mechanism for the formation of ZnO microspheres has been proposed, in which carbon spheres play a crucial role in the formation of the wurtzite hollow ZnO microspheres. The specific structure of the hollow spheres may find applications in nanoelectronics, nanophotonics and nanomedicine.

PMID:
19853492
DOI:
10.1016/j.ultsonch.2009.09.010
[Indexed for MEDLINE]
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