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arXiv 0712.3534cond-mat.mtrl-sci
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量子限制型CdS纳米管的合成

Synthesis of quantum-confined CdS nanotubes

A. K. Mahapatra

摘要:

通过化学方法合成了壁厚与体材料的激子直径相当的CdS纳米管。实验条件的改变导致纳米线和良好分离的纳米颗粒的形成。测得纳米管的直径和壁厚分别为14.4 $\pm$ 6.1和4.7 $\pm$ 2.2 nm。大量具有纤锌矿结构的CdS纳米晶构成了这些纳米管。由于量子限制效应,这些纳米管的光吸收和光致发光峰位相对于其体值具有高的能量位移。提出了化学反应中气泡和颗粒的成核和生长,以及它们之间的动力学和相互作用是形成纳米管的原因。

英文摘要:

CdS nanotubes with wall thickness comparable to excitonic diameter of the bulk material are synthesized by a chemical route. A change in experimental conditions result in formation of nanowires, and well-separated nanoparticles. The diameter and wall thickness of nanotubes measured to be 14.4 $\pm$ 6.1 and 4.7 $\pm$ 2.2 nm, respectively. A large number of CdS nanocrystallites having wurzite structure constitute these nanotubes. These nanotubes show high energy shifting of optical absorption and photoluminescence peak positions, compared to its bulk value, due to quantum confinement effect. It is proposed that nucleation and growth of bubbles and particles in the chemical reaction, and their kinetics and interactions are responsible for the formation of nanotubes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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