Synthesis and formation mechanism of helical single-crystalline CuInSe2 nanowires
Synthesis and formation mechanism of helical single-crystalline CuInSe2 nanowires
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螺旋单晶CuInSe2纳米线的合成及形成机制
DOI：
10.1039/c1ce05777d
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发表时间：
2011-11
期刊：
影响因子：
3.1
通讯作者：
Li, Quan
中科院分区：
文献类型：
--
作者：
Shi, Liang;Li, Quan
以氧化铝(AAO)为硬模板，通过简单的溶液法制备了高度有序的CuInSe2单晶纳米线阵列。用这种方法可以制备出具有新颖螺旋形状的CuInSe2纳米线。基于详细的结构表征，提出了一种螺旋位错诱导生长过程来解释这种有趣的纳米结构的形成机制。CuInSe2螺旋纳米线的平均直径为200 nm，周期约为50-100 nm。在产物中还发现了另一种形状笔直的CuInSe2纳米线，并用定向附着机制解释了它的生长。两种形状的纳米线具有相同的[112]生长方向。用X射线粉末衍射仪、透射电子显微镜、能量色散X射线能谱、扫描电子显微镜和紫外可见光谱对样品的结构、形貌、组成和光吸收性能进行了表征。
Highly ordered single-crystalline CuInSe2 nanowires array have been prepared via a facile solution approach by using anodic aluminium oxide (AAO) as a hard template. CuInSe2 nanowires with a novel helical shape are found to be formed by this approach. A screw-dislocation-induced growth process is proposed for the formation mechanism of this interesting nanostructure based on detailed structural characterizations. The CuInSe2 helical nanowires have an average diameter of 200 nm and a periodicity of about 50–100 nm. Another type of CuInSe2 nanowire with a straight shape is also found in the product and an oriented attachment mechanism has been used to explain its growth. Nanowires with both types of shapes have the same [112] growth direction. The structure, morphology, composition and optical absorption properties of the as-prepared samples were characterized using X-ray powder diffraction, transmission electron microscopy, energy dispersive X-ray spectrometry, scanning electron microscopy and UV-Vis spectrophotometry.
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