纳米碳管中离散分布的金属Ni纳米线气-液/固-固填充模型

功能材料, 2007, 38(11): 1893-1897.

纳米碳管中离散分布的金属Ni纳米线气-液/固-固填充模型

吴萍 ^1, , 陈蓓 ^2, , 邹兴权 ^3, , 李强 ^4, , 张丹莉 ^5, , 肖潭 ^6,

1.汕头大学,材料物理与化学专业,广东,汕头,515063

2.汕头大学,材料物理与化学专业,广东,汕头,515063

3.汕头大学,材料物理与化学专业,广东,汕头,515063

4.汕头大学,材料物理与化学专业,广东,汕头,515063

5.汕头大学,材料物理与化学专业,广东,汕头,515063

6.汕头大学,材料物理与化学专业,广东,汕头,515063

基金项目: 国家自然科学基金(10572079) 广东省自然科学基金(07008103)

关键词：纳米碳管 , 纳米线 , V-L/S-S模型

A V-L/S-S model for the formation of separated metallic Ni nanowire filled in carbon nanotubes

以Ni∶Cr=3∶1的双金属层作为催化剂,用C2H2为碳源气体利用化学气相沉积(CVD)法,在不同的温度下制备纳米碳管.扫描电子显微镜(SEM)和透射电子显微镜(TEM)研究制备产物发现:当制备温度高于900℃时,没有纳米碳管生成,制备温度在700～800℃之间纳米碳管中填充有一些离散分布的金属Ni纳米线,制备温度在650℃有纳米碳管生成,但是纳米碳管中没有发现纳米线的填充.通过高分辨透射电子显微镜(HRTEM)分析发现,纳米线是以液态或是粘滞液态填充进纳米碳管.根据实验结果,提出了一个在本实验条件下纳米线填充进纳米碳管的气-液/固-固V- L/S -S(vapor- liquid/solid-solid)模型,这个模型能解释一些传统的V-L-S(vapor- liquid -solid)模型不能解释的实验现象.

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