A new modulated structure in α-Fe2O3 nanowires

doi:10.1088/1674-1056/22/10/107401

Abstract A new modulated structure consisting of periodic (1120) stacking faults (SFs) in the α-Fe₂O₃ nanowires (NWs) formed by the thermal oxidation of Fe foils is reported, using a combination of high-resolution transmission electron microscopy (HRTEM) observations and HRTEM image simulations. The periodicity of the modulated structure is 1.53 nm, which is ten times (3300) interplanar spacing and can be described by a shift of every ten (3300) planes with 1/2 the interplanar spacing of the (1120) plane. An atomic model for the Fe₂O₃ structure is proposed to simulate the modulated structure. HRTEM simulation results confirm that the modulated structure in α-Fe₂O₃ NWs is caused by SFs.

Keywords: crystal structure nanocrystalline materials electron microscopy simulation and modeling

Received: 18 March 2013
Revised: 27 April 2013
Accepted manuscript online:

PACS:	74.62.Bf	(Effects of material synthesis, crystal structure, and chemical composition)
	75.50.Tt	(Fine-particle systems; nanocrystalline materials)
	87.64.Ee	(Electron microscopy)
	61.43.Bn	(Structural modeling: serial-addition models, computer simulation)

Fund: Project supported by the National Key Basic Research Development Program of China (Grant No. 2012CB722705), the Natural Science Foundation for Outstanding Young Scientists in Shandong Province, China (Grant No. JQ201002), the Program for Foreign Cultural and Educational Experts (Grant No. 20123702083), the Program for Higher Education Science and Technology in Shandong Province (Grant No. J12LA17). Wang Yi-Qian would like to thank the financial support from Taishan Outstanding Overseas Scholar Program of Shandong Province, China.

Corresponding Authors: Wang Yi-Qian
E-mail: yqwang@qdu.edu.cn

Cite this article:

Cai Rong-Sheng (蔡鎔声), Shang Lei (商蕾), Liu Xue-Hua (刘雪华), Wang Yi-Qian (王乙潜), Yuan Lu (袁露), Zhou Guang-Wen (周光文) A new modulated structure in α-Fe₂O₃ nanowires 2013 Chin. Phys. B 22 107401

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A new modulated structure in α-Fe2O3 nanowires

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A new modulated structure in α-Fe₂O₃ nanowires