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Cd_(1-x)Mn_xS纳米棒的水热合成及光谱性能
作者:黄扬风 肖汉宁 陈曙光  
单位:湖南大学材料科学与工程学院 长沙理工大学材料科学与工程学院  
关键词:硫化镉纳米棒  锰离子掺杂  光学特性  水热合成 
分类号:TB383.1
出版年,卷(期):页码:2008,36(12):1744-1748
DOI:
摘要:

采用水热法成功合成了Cd1-xMnxS(x=0~0.05)纳米棒。采用扫描电镜、X射线衍射和Raman光谱表征Cd1-xMnxS的形貌和微结构,通过紫外光谱和荧光光谱表征其光学特性。结果表明:随着Mn2+含量的增加,Cd1-xMnxS纳米棒直径基本保持不变,但长度变短,形貌变得较杂乱,并且伴随产生颗粒。Mn2+掺杂CdS纳米棒保持了六方CdS结构,Mn2+在CdS纳米棒晶体中代替部分Cd2+的位置构成置换式固溶体。Cd1-xMnxS纳米棒的紫外吸收光谱和荧光光谱都随Mn2+含量的增加而逐渐红移。

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The Cd1–xMnxS(x=0–0.05) nanorods were successfully synthesized through the hydrothermal route.The morphology and microstructure of Cd1–xMnxS nanorods were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD) and Raman spectrometry.The optical properties of Cd1–xMnxS nanorods were investigated with ultraviolet–visible spectrophotometer(UV–Vis) absorption spectroscopy and photoluminescence(PL) emission spectroscopy.The results show that with the increase of Mn2+ in the samples,the morphology of products become disordered,accompanied with some nanoparticles.The diameter of nano-rods remains almost the same,but the length becomes shorter.Mn2+ enters the position of Cd2+ by substitution,which leads to a de-crease of the lattice constants of hexagonal CdS.Both the absorption band edge and the PL emission spectroscopy of Cd1–xMnxS nanorods shifted gradually to a longer wavelength with the increase of Mn2+,which suggests that the substitution between Mn2+ and Cd2+ leads to lattice distortion and the energy increase of CdS crystal.

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