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. 2012 May 30;7(1):276. doi: 10.1186/1556-276X-7-276

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Copyright ©2012 Feng et al.; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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XRD patterns. XRD pattern of the (a) hollow spherical Cu₂O (SI1-A1 in Additional file 1), (b) octahedral Cu₂O (SI1-A2 in Additional file 1), and (c) JCPDS cards of Cu₂O (PDF file No.05-0667).