Studies on the growth and characterization of CdS and PbS nanoparticles using sugar-ester nonionic water-in-oil microemulsion
Document Type
Article
Publication Date
1-1-2003
Abstract
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. © 2003 Elsevier Science B.V. All rights reserved.
Keywords
A1. Nanostructures A1. X-ray diffraction A2. Growth from solutions B1. Nanomaterials B2. Semiconducting materials Cadmium sulfide Crystal growth Energy gap Esters Lead compounds Microemulsions Morphology Nanostructured materials Semiconductor quantum dots Sugar (sucrose) Surface active agents Transmission electron microscopy Water X ray diffraction analysis X ray photoelectron spectroscopy Quantum confinement effects Semiconductor materials
Divisions
PHYSICS
Publication Title
Journal of Crystal Growth
Volume
254
Issue
1-2