Synthesis and characterization of copper sulfide nanoparticles in hexagonal phase lyotropic liquid crystal

Khiew, P.S. and Radiman, S. and Huang, N.M. and Ahamd, M.S. (2004) Synthesis and characterization of copper sulfide nanoparticles in hexagonal phase lyotropic liquid crystal. Journal of Crystal Growth, 268 (1-2). pp. 227-237. ISSN 00220248

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Abstract

Copper sulfide nanoparticles were prepared in lyotropic hexagonal phase consisting of poly (oxyethelene) 5 nonyl phenol ether (NP5), poly (oxyethelene) 10 nonyl phenol ether (NP10), cyclohexane and aqueous solutions. The stability of the hexagonal phase, which was employed as the reaction template, has been determined by polarizing microscopy, small-angle X-ray scattering (SAXS) and rheology measurement. The optical observation showed that the hexagonal phase liquid crystal system still presented the characteristics spherulitic and focal conic texture after the growth reaction. In addition, there was giving no significant changes on the rheological response of the surfactant system after the formation of the copper sulfide nanoparticles. SAXS data showed that the microstructure dimensions of the surfactant aggregates were preserved and not affected by the growth reaction inside the systems. The final products were characterized by energy filter transmission microscopy, energy dispersive X-ray analysis and UV-visible absorption spectroscopy. The results showed that the size and morphology of the nanoparticles obtained were greatly affected by the reaction aging time. The presence of quantum confinement effect was apparent for the resulting nanoparticles as the estimated optical band-gap energy increased markedly with the decrement of the particles size. © 2004 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: A1. Crystal morphology A1. Nanostructures A1. Optical microscopy B1. Nanomaterials B2. Semiconducting materials Data reduction Laser ablation Liquid crystals Nanostructured materials Optical microscopy Optoelectronic devices Quantum theory Semiconductor materials Transmission electron microscopy Ultraviolet radiation X ray analysis X ray scattering Band-gap energy Chemical bath deposition (CBD) Copper sulfide Crystal morphology Lamellar phase liquid crystal Copper compounds
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: miss munirah saadom
Date Deposited: 03 Apr 2013 03:48
Last Modified: 03 Apr 2013 03:48
URI: http://eprints.um.edu.my/id/eprint/5353

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