Nano Archive

Synthesis of ZnSe quantum dots and ZnSe-ZnS core/shell nanostructures

Ali, Moazzam and Sarma, D. D. (2007) Synthesis of ZnSe quantum dots and ZnSe-ZnS core/shell nanostructures. Journal of Nanoscience and Nanotechnology, 7 (6). pp. 1960-1964. ISSN 1533-4880

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Official URL: http://www.ingentaconnect.com/content/asp/jnn/2007...

Abstract

Colloidal ZnSe nanocrystals were synthesized in hot mixtures of long-chain alkylamines, fatty acids, and alkylphosphines. It was possible to tune the size of nanocrystals by varying the reaction time. Transmission electron microscope images showed the presence of spherical ZnSe nanocrystals and X-ray diffraction pattern of ZnSe nanocrystals showed the existence of both the crystalline phase, namely, wurtzite and zinc blencle. The ZnSe nanocrystals were then passivated with higher band gap ZnS; this lead to a 2.6-fold enhancement in the integrated photoluminescence intensity of ZnSe nanocrystals. We also synthesized the reverse type core/shell ZnS/ZnSe nanocrystals. These exhibited a significant red shift in the absorption edge after coating with a thin ZnSe shell.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Physical Science > Quantum phenomena
Material Science > Nanochemistry
Material Science > Nanostructured materials
Physical Science > Photonics
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3911
Deposited By:JNCASR
Deposited On:27 Jan 2009 04:11
Last Modified:27 Jan 2009 04:11

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