Singh Satyendra, Krupanidhi S B
Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.
J Nanosci Nanotechnol. 2008 Nov;8(11):5757-61. doi: 10.1166/jnn.2008.212.
This paper reports an experimental study on the synthesis and structural characterization of lead zirconate, PbZrO3, (PZ) nanotubes fabricated by an improved sol-gel method within the nanochannels of anodic aluminum oxide (AAO) templates. The morphology, structure, and composition of the nanotubes were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), selected-area electron diffraction (SAED), high resolution TEM (HRTEM) and energy-dispersive X-ray spectroscopy (EDX). The results of XRD and SAED indicated that postannealed (700 degrees C for 1 h) PZ nanotubes had an orthorhombic distorted perovskite polycrystalline crystal. SEM and TEM analysis revealed that PZ nanotubes possessed a uniform length and diameter, which were controlled by the thickness and the pore diameter of the applied AAO template, respectively and the thickness of the wall of the PZ nanotubes was about 15 nm. Y-junctions were also observed in the PZ nanotubes. EDX analysis demonstrated that stoichiometric PbZrO3 was formed. HRTEM image and a typical SEM image confirmed that the obtained PZ nanotubes composed of nanoparticles in the range of 4-8 nm. The possible formation mechanism of nanotubes was discussed.
本文报道了一项关于通过改进的溶胶-凝胶法在阳极氧化铝（AAO）模板的纳米通道内制备锆酸铅（PbZrO3，PZ）纳米管的合成及结构表征的实验研究。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、选区电子衍射（SAED）、高分辨率TEM（HRTEM）和能量色散X射线光谱（EDX）对纳米管的形貌、结构和组成进行了表征。XRD和SAED结果表明，退火后（700℃，1小时）的PZ纳米管具有正交畸变钙钛矿多晶晶体结构。SEM和TEM分析表明，PZ纳米管具有均匀的长度和直径，分别由所应用的AAO模板的厚度和孔径控制，且PZ纳米管的管壁厚度约为15nm。在PZ纳米管中还观察到了Y型结。EDX分析表明形成了化学计量比的PbZrO3。HRTEM图像和典型的SEM图像证实，所获得的PZ纳米管由4-8nm范围内的纳米颗粒组成。讨论了纳米管可能的形成机制。
