Controlled growth of highly ordered CdSe one-dimensional nanostructures
Controlled growth of highly ordered CdSe one-dimensional nanostructures
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DOI：
10.1088/0957-4484/16/12/067
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发表时间：
2005-12
期刊：
影响因子：
3.5
通讯作者：
C. Shan;Z. Liu;S. Hark
中科院分区：
文献类型：
--
作者：
C. Shan;Z. Liu;S. Hark
以溅射金为催化剂，在金属-有机化学气相沉积系统中实现了镉镉纳米针和纳米棒的可控生长。对纳米结构的形貌、密度和结构的控制是通过单独改变生长参数来实现的。通过改变生长温度，CdSe结构的形貌可以从锥形纳米针转变为均匀的纳米棒。它们的密度也可以通过改变沉积金的量来控制。用扫描电镜对其形貌和密度变化进行了表征。x射线衍射和透射电镜分析结果表明，纳米针尖沿生长方向呈锌闪锌矿结构，纳米棒沿生长方向呈纤锌矿结构。
Controlled growth of CdSe nanoneedles and nanorods was realized in a metal–organic chemical vapour deposition system by employing sputtered Au as a catalyst. The controls over the morphology, density and structure of the nanostructures were realized by varying the growth parameters independently. By varying the growth temperature, the morphology of the CdSe structures can be changed from tapered nanoneedles to uniform nanorods. Their density can also be controlled by just changing the amount of deposited Au. The changes in morphology and density were characterized by scanning electron microscopy. X-ray diffraction and transmission electron microscopy show that the tapered nanoneedles crystallize in the zinc-blende structure with the growth direction along , and the uniform nanorods in the wurtzite structure with the growth direction along .