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Journal of Nanomaterials
Volume 2016 (2016), Article ID 4103847, 5 pages
http://dx.doi.org/10.1155/2016/4103847
Research Article

Stepwise Growth of Hollow Hexagonal α-Fe2O3 Nanocrystals

School of Science, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China

Received 26 July 2016; Accepted 4 October 2016

Academic Editor: Fusheng Ma

Copyright © 2016 Liqun Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Magnetic nanocrystals have attracted much attention in various fields because of their fundamental size and shape dependent magnetism and many technological applications. In this study, hollow hexagonal α-Fe2O3 nanocrystals were synthesized using a normal hydrothermal method. A full growth evolution map of nanocrystals with different shapes was investigated to elucidate the growth mechanism. We had demonstrated the growth mechanism using the selective adsorption and dissolution theory and interestingly found that K+ cations were also a key point during the process of α-Fe2O3 nanocrystals growing. At last, the magnetic properties of the hexagonal α-Fe2O3 nanocrystals were also investigated.