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In relation to this article, we declare that there is no conflict of interest.
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Received May 15, 2011
Accepted July 4, 2011
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Morphology-controlled Synthesis of CuO nano- and microparticles using microwave irradiation

Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
ce20047@postech.ac.kr
Korean Journal of Chemical Engineering, February 2012, 29(2), 243-248(6), 10.1007/s11814-011-0168-4
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Abstract

Microwave irradiation was used to obtain a variety of CuO crystal morphologies, including leaf-like, dandelion-like, and hollow structures. The morphology of the CuO crystals was controlled by varying the alkali source (NaOH, hexamethylenetetramine, ammonia, or urea) and heating at 95 ℃ for 1 hr. The X-ray diffraction patterns of as-prepared CuO crystals were consistent with high quality crystals with a monoclinic crystal structure. Field emission scanning electron microscopy (FE-SEM) and tunneling electron microscopy (TEM) images of CuO crystals revealed that the leaf-like CuO crystals had an average length of 950 nm and width of 450 nm, the small leaf-like CuO crystals had an average length of 450 nm and width of 200 nm, the dandelion-like CuO structures had an average diameter of 2 m, and the hollow CuO structures had an average diameter 2 m. Possible mechanisms for structure formation during the shape-selective CuO synthesis were proposed based on these results.

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