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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
(a) TEM image; (b) HRTEM image; (c) TEM image of the selected mapping area and the corresponding elemental mapping of (d) Cu, (e) Fe, (f) Bi of the T-CBO/A-BFO (1:1). The arrows pointed to the interplanar spacing for different CBO planes.