摘要
采用气相合成技术合成了MgO三维纳米分级结构,该结构由纳米线、纳米棒、纳米丝3部分组成.高分辨电镜照片显示第一级纳米线的生长方向为[100],纳米棒与纳米丝呈四次对称分布在纳米线的侧面,其生长方向为[110].沉积区的高温和适当的反应物对三维分级纳米结构的形成起了决定性作用,气固生长模式和气液固生长模式共同主导了三维分级纳米结构形成.
MgO three-dimensional（3D） hierarchical nanostructures were synthesized through a simple vapor deposition method.These nanostructures were composed of three parts： nanowires,nanorods and nanofibers.High resolution transmission electron microscopy（HRTEM） demonstrated that the growth direction of nanowires was ,while nanorods and nanofibers grew on the side of nanowires along with 4-fold symmetries.The formation of hierarchical nanostructures was determined by the high temperature of crystallizing field and proper reagent.The growth process was investigated and the growth mechanism was suggested in this paper that vapor-solid and vapor-liquid-solid model should dominate the growth of 3D nanostructues.
出处
《物理实验》
北大核心
2011年第3期11-17,共7页
Physics Experimentation
基金
国家重点基础研究发展计划纳米材料和纳米结构的性能和应用基础(No.2005CB623603)
关键词
MGO
纳米分级结构
气相合成
MgO
hierarchical nanostructure
vapor deposition method
