Keyson, D.Volanti, D. P. [UNESP]Cavalcante, L. S.Simões, Alexandre Zirpoli [UNESP]Varela, José Arana [UNESP]Longo, Elson [UNESP]2014-05-202014-05-202008-03-04Materials Research Bulletin. Oxford: Pergamon-Elsevier B.V. Ltd, v. 43, n. 3, p. 771-775, 2008.0025-5408http://hdl.handle.net/11449/25636This letter reports the synthesis of CuO urchin-nanostructures by a simple and novel hydrothermal microwave method. The formation and growth of urchin-nanostructures is mainly affected by the addition of polyethylene glycol (PEG). The hierarchical malachite particles are uniform spheres with a diameter of 0.7-1.9 mu m. CuO urchin-nano structures were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FEG-SEM) and nitrogen adsorption (BET). The specific surface area of the CuO nanostructured microspheres was about 170.5 m(2)/g. A possible mechanism for the formation of such CuO urchin-nanostructures is proposed. (c) 2007 Elsevier Ltd. All rights reserved.771-775engoxideschemical synthesiselectron microscopyArtigo10.1016/j.materresbull.2007.03.019WOS:000253441400035Acesso restrito357336348661490423547399804067250000-0001-9315-9392