Densely packed single-crystal Bi2Fe4O9 nanowires fabricated from a template-induced sol-gel route

摘要

Densely packed single-crystal Bi2Fe4O9 nanowires were successfully synthesized by a template-induced citrate-based sol-gel process. The structural properties of the nanowires were characterized using many techniques. The results of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that Bi2Fe4O9 nanowires possessed a uniform length and diameter, which were controlled by the thickness and the pore diameter of the applied porous anodic aluminum oxide (AAO) template, respectively. The results of X-ray diffraction (XRD) and the selected area electron diffraction (SAED) indicated that Bi2Fe4O9 nanowires had an orthorhombic single-crystal structure. Furthermore, the energy-dispersive X-ray (EDX) spectroscopy demonstrated that the stoichiometric Bi2Fe4O9 was formed. The possible formation mechanism of nanowires was also discussed. (c) 2006 Elsevier Inc. All rights reserved.