Fabrication and photoluminescence of high-quality ternary CdSSe nanowires and nanoribbons
Fabrication and photoluminescence of high-quality ternary CdSSe nanowires and nanoribbons
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DOI：
10.1088/0957-4484/17/4/040
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发表时间：
2006-02-28
期刊：
影响因子：
3.5
通讯作者：
Zou, BS
中科院分区：
文献类型：
--
作者：
Pan, AL;Yang, H;Zou, BS
以Au为催化剂，采用一步热蒸发法成功地生长了三元合金CdSSe纳米线和纳米带。所得纳米结构直径均匀，表面光滑。高分辨率透射电子显微镜、能量色散X射线光谱和X射线衍射表明，纳米线和纳米带都具有高质量的单晶性质，其组成分别为CdS 0.6Se 0.4和CdS 0.3Se 0.7。讨论了这两种不同纳米结构的形成机理。光致发光测量显示两个样品的非常强的带边发射，这进一步证明了所获得的CdSSe合金的单晶性质。这一发现可以推广到其他成分可调的ID三元合金纳米结构的制备。
Ternary alloy CdSSe nanowires and nanoribbons were successfully grown through a one-step thermal evaporation route using Au as a catalyst. The nanostructures obtained are uniform in diameter, and have smooth surfaces. High-resolution transmission electron microscopy, energy dispersive x-ray spectra and x-ray diffraction showed that both the nanowires and the nanoribbons have high-quality single-crystalline nature, and their compositions can be determined as CdS0.6Se0.4 and CdS0.3Se0.7, respectively. The mechanisms of formation of these two different nanostructures were discussed. The photoluminescence measurements showed very strong band-edge emission for both samples, which further demonstrates the single-crystal nature of the as-obtained CdSSe alloys. This finding may be extended for fabricating other composition-tunable ID ternary alloy nanostructures.