摘要
The effect of Sb addition on the morphology of self-catalyzed InAsSb nanowires （NWs） has been systematically investigated. InAs NWs were grown by molecular beam epitaxy with and without antimony （Sb） flux. It is demonstrated that trace amounts of Sb flux are capable of tuning the geometry of NWs, i.e., enhancing lateral growth and suppressing axial growth. We attribute this behavior to the surfactant effect of Sb which results in modifications to the kinetic and thermodynamic processes. A thermodynamic mechanism that accounts for Sb segregation in InAsSb NWs is also elucidated. This study opens a new route towards precisely controlled NW geometries by means of Sb addition.
自我催化的 InAsSb nanowires NW 的形态学上的 Sb 增加的效果系统地被调查了。InAs NW 被分子的横梁取向附生有或没有锑 Sb 流动种。Sb 流动的踪迹数量能够调节 NW 的几何学，这被表明，即，提高侧面的生长并且压制轴的生长。我们把这行为归因于导致修正到运动、热力学的过程的 Sb 的表面活化剂效果。在 InAsSb NW 说明 Sb 分离的热力学的机制也被阐明。这研究借助于 Sb 增加向精确控制的 NW 几何学打开一条新线路。
