(1. 中南大学 粉末冶金研究院，长沙 410083；2. 中南大学 出版社，长沙 410083)
摘 要: 采用金属催化法结合化学气相沉积法制备一维W纳米结构阵列，对一维W纳米结构阵列可控制备进行系统的研究。结果表明：一维W纳米结构阵列的直径主要受到催化剂和N2流量的影响，随着催化剂颗粒尺寸的减小或者N2流量的减小，催化生长后W纳米线直径的尺寸也相应变小；一维W纳米结构阵列的长度主要受到生长时间的影响，生长时间的延长会使W纳米线阵列的长度也相应的增加，有利于超长W纳米线阵列的合成；一维W纳米结构阵列的密度主要受到催化剂和WO3粉末粒径的影响，随着催化剂颗粒的密度的增加或者WO3粒径的减小，W纳米线阵列的密度也相应增加；一维W纳米结构阵列的形貌主要受到生长温度和基片材料的影响。
关键字: 一维纳米材料；钨纳米结构；阵列；金属催化法；气相沉积法；可控制备
（1. Powder Metallurgy Research Institute, Central South University, Changsha 410083, China;
2. Central South University Press, Changsha 410083, China）
Abstract:One-dimensional tungsten nano-structure arrays were successfully prepared by metal-catalyzed chemical vapor deposition method. Controllable preparation of W nanowire arrays was studied. The results show that the diameter of the W nanowire arrays is mainly decided by the influence of the catalyst and N2 flow. The diameter of the W nanowires correspondingly decreases with the reduction in size of the catalyst particles, or the reduction of the N2 flow rate. The length of the W nanowire arrays is mainly influenced by the growth time. The extension of the growth time will correspondingly increase the length of W nanowire arrays, which is beneficial to synthesis extra long W nanowire arrays. The density of the W nanowire arrays is mainly decided by the influence of the catalyst and N2 flow. The density of the W nanowires correspondingly increases with increasing the density of the catalyst particles or decreasing the WO3 particle size. The morphology of W nanowire arrays is mainly influenced by the growth temperature and the substrate material.
Key words: one-dimensional nano-materials; tungsten nano-structure; array; metal catalyzed method; chemical vapor deposition method; controllable preparation
