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首页> 外文期刊>Journal of Crystal Growth >Studies on the growth and characterization of CdS and PbS nanoparticles using sugar-ester nonionic water-in-oil microemulsion
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Studies on the growth and characterization of CdS and PbS nanoparticles using sugar-ester nonionic water-in-oil microemulsion

机译：糖酯非离子油包水型微乳液研究CdS和PbS纳米粒子的生长和表征

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摘要

The nanometer-sized semiconductors of CdS and PbS were prepared in the nonionic water-in-oil microemulsion system formed by sucrose monoester, 1-butanol, cyclohexane and water. The surfactant that has been employed in the present study is commercial food grade additive, in which is biodegradable and nonhazardous to the environment. The resultant nanoparticles were characterized by X-ray diffraction measurements in order to determine the crystalline phase of the products. The structural and morphological features of the nanoparticles have been investigated by energy filter transmission electron microscopy, X-ray photoelectron spectroscopy and UV-Vis absorption spectroscopy. The experimental results showed that the synthesized nanoparticles exhibited strong quantum confinement effect as the optical band gap increased significantly as compared to the bulk molecules. In addition, the as-prepared nanoparticles were found in spherical shape with a reasonably narrow size distribution.
机译：在蔗糖单酯，1-丁醇，环己烷和水组成的非离子油包水微乳液体系中制备了CdS和PbS纳米级半导体。本研究中已使用的表面活性剂是商业食品级添加剂，在其中可生物降解且对环境无害。通过X射线衍射测量来表征所得的纳米颗粒，以便确定产物的结晶相。通过能量过滤器透射电子显微镜，X射线光电子能谱和UV-Vis吸收能谱研究了纳米颗粒的结构和形态特征。实验结果表明，与大分子相比，随着光学带隙的增加，合成的纳米粒子表现出较强的量子约束作用。另外，发现制备的纳米颗粒为球形，具有合理窄的尺寸分布。

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