摘要
采用热蒸发SnO粉末制备了多分支SnO2纳米线节点。采用透射电镜和场发射扫描电镜研究了其纳米结构。结果表明:Sn纳米粒子来自于SnO粉末分解,并作为自催化剂控制SnO2纳米线节点的生长;斜方晶相是替代金红石相而成为SnO2在生长过程中的主要晶相,通过电子衍射和高分辨电镜观察,SnO2纳米线的枝叶和枝干是外延生长方式,生长取向沿着斜方[110]和[110-]。提出了SnO2纳米线节点的自催化气-液-固生长机制。
Multiple branched SnO2 nanowire junctions have been synthesized by thermal evaporation of SnO powder.Their nanostructures were studied by transmission electron microscopy and field emission scanning electron microcopy.It was observed that Sn nanoparticles generated from decomposition of the SnO powder acted as self-catalysts tocontrol the SnO2 nanojunction growth. Orthorhombic SnO2 was found as a dominate phase in nanojunction growthinstead of rutile structure The branches and stems of nanojunctions were found to be an epitaxial growth by electrondiffraction analysis and high-resolution electron microscopy olxservation. The growth directions of the branched SnO2nanojunctions were along the orthorhombic [110] and [ 110 ] A self-catalytic vapor liquid solid growth mechanism isproposed to describe the growth process of the branched SnO2 nanowire junctions.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2015年第8期32-35,共4页
China Ceramics
关键词
表征
晶体结构
纳米材料
自催化
Characterization, Crystal structure
Nanomaterials
Self-catalysts
