Using sonochemistry for the fabrication of hollow ZnO microspheres.
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.
Jia
Xiaohua
X
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China. xhjia2003@126.com
Fan
Huiqing
H
Zhang
Faqiang
F
Qin
Lei
L
D002244:Carbon / Q000737:chemistry; D003460:Crystallization; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D008863:Microspheres; D050997:Nanomedicine; D013499:Surface Properties; D013696:Temperature; D013818:Thermogravimetry / Q000379:methods; D014465:Ultrasonics; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
D002244:Carbon; D015034:Zinc Oxide