Xi L F, Lam Y M
Department of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
J Colloid Interface Sci. 2007 Dec 15;316(2):771-8. doi: 10.1016/j.jcis.2007.07.067. Epub 2007 Aug 2.
CdSe nanoparticles have been successfully synthesized using a novel microemulsion method at moderate temperature. It is found that with a combination of the surfactant AOT and hydrazine hydrate, it is possible to control the morphology of the nanoparticles. The hydrazine hydrate acts as both a reducing agent and a templating agent that favors the formation of a rodlike structure. The composition, morphology and optical properties of the CdSe nanoparticles were investigated using powder X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) absorption spectroscopy, photoluminescence (PL) spectroscopy, energy dispersive X-ray spectroscopy (EDX) and Fourier transform infrared (FT-IR) spectroscopy. The nucleation and growth mechanism for this system is also proposed based on a time-dependent study. This synthesis route provides a moderate temperature (100 degrees C) method for synthesizing rodlike CdSe, hence reducing the possibility of oxidation of this chalcogenide compound.
采用一种新型微乳液法在适中温度下成功合成了CdSe纳米颗粒。研究发现，通过将表面活性剂AOT与水合肼相结合，可以控制纳米颗粒的形态。水合肼既作为还原剂又作为模板剂，有利于形成棒状结构。利用粉末X射线衍射（XRD）、透射电子显微镜（TEM）、紫外可见（UV-vis）吸收光谱、光致发光（PL）光谱、能量色散X射线光谱（EDX）和傅里叶变换红外（FT-IR）光谱对CdSe纳米颗粒的组成、形态和光学性质进行了研究。基于时间依赖性研究，还提出了该体系的成核和生长机制。该合成路线提供了一种在适中温度（100摄氏度）下合成棒状CdSe的方法，从而降低了这种硫族化合物氧化的可能性。
