BaCO_3单晶纳米线的制备和表征

Preparation and Characterization of BaCO_3 Single-Crystalline Nanowires by a Solvothermal Process

本文以有机钛偶合体胶束作模板剂,采用溶剂热技术,成功制备了单晶碳酸钡纳米线,并通过X-射线衍射(XRD)、能量损失谱(EDX)、透射电子显微镜(TEM)、高分辨电子显微镜(HRTEM)、选区电子衍射(SAED)对纳米线进行了表征。碳酸钡纳米线呈均匀的直线形,直径为25～60nm,长度达到十几微米。并对BaCO3纳米线的形成机理进行了浅析。

Single-crystal BaCO3 nanowires have been successfully prepared by a solvothermal process, using organic titanic compound micelles as templates. The nanowires have been characterized by X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), high-resolution electron microscopy (HRTEM) and convergent beam electron diffraction (CBED). Lattice parameters of BaCO3 single-crystal nanowires are consistent with the standard values in JCPDS card of BaCO3, which belongs to orthorhombic system, space group Pmcn(62). The morphology of BaCO3 nanowires is mainly straight. The diameters of the nanowires are about 25 similar to 60nm and lengths reaches up to 10mum. The formation mechanism for BaCO3 nanowires was also discussed. This paper presents a promising method for the preparation of nanowires of complex salts.