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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 35, Number 11
BKCSDE 35(11)
November 20, 2014 

Facile Precipitation Method for Morphological Tuning of Cu2O Crystals
Young-Sik Cho, Young-Duk Huh*
Morphology, Cu2O, Precipitation method, Crystal growth
We have developed a simple method for tuning the morphologies of Cu2O microcrystals. Cu2O microcrystals were prepared by precipitation at room temperature from a mixture of Cu(CH3COO)2·H2O, N,N,N',N'- tetramethyl ethylenediamine (TMEDA), ascorbic acid, and polyethylene glycol (PEG). TMEDA was used to promote the formation of copper-TMEDA complexes. A variety of Cu2O microcrystal morphologies were obtained simply by varying the concentrations of TMEDA and ascorbic acid. Aggregated Cu2O microspheres are formed at higher concentrations of ascorbic acid in the absence of TMEDA. Aggregated Cu2O microcubes are formed at lower concentrations of ascorbic acid and higher concentrations of TMEDA. The crystal growth mechanism of these Cu2O morphologies is explained.
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