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Journal of Nanoparticle Research

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01-04-2011 | Research Paper

ZnO spheres and nanorods formation: their dependence on agitation in solution synthesis

Authors: Zhengzhi Zhou, Yong Ding, Xihong Zu, Yulin Deng

Published in: Journal of Nanoparticle Research | Issue 4/2011

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Abstract

ZnO nanostructures including nanorods, dense, and partially hollow spheres were synthesized via a solution synthesis method with temperature ranging from 65 to 95 °C. Scanning electron microscopy (SEM) revealed that the diameter of the spheres is in the range of 200–500 nm. Transmission electron microscopy (TEM) showed that some of the spheres are hollow or partially hollow. Powder X-ray Diffraction (XRD) and TEM-Selected area electron diffraction (SAED) analysis showed that the spheres consist of polycrystalline nanoparticles. It was found for the first time that the agitation during the synthesis plays a critical role on morphology of the ZnO nanostructures formed in solution. The oriented attachment of nanocrystals without agitation during the synthesis could guide the nanocrystals to form an ordered nanorod structure. However, the disordered aggregation of the nanocrystals under shear force resulted in a spherical morphology. It was also found that the composition of spheres is different from that of nanorods: the spheres consist of both ZnO and Zn(OH)₂, but nanorods consist of single-crystal ZnO only. Zn(OH)₂ presented in the spheres could decompose to ZnO by calcination, resulting in the formation of hollow spheres.

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Title: ZnO spheres and nanorods formation: their dependence on agitation in solution synthesis
Authors: Zhengzhi Zhou
Yong Ding
Xihong Zu
Yulin Deng
Publication date: 01-04-2011
Publisher: Springer Netherlands
Published in: Journal of Nanoparticle Research / Issue 4/2011
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-010-9922-5

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