Nano Archive

Preparation of pure CdSe nanocrystals through mechanical alloying

Tan, G. L. and Liu, R. H. (2010) Preparation of pure CdSe nanocrystals through mechanical alloying. Journal of Nanoparticle Research, 12 (2). pp. 605-614.

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Abstract

Pure CdSe nanocrystals have been successfully synthesized by mechanical alloying Cd and Se elemental powders. XRD results show that pure CdSe compound in wurtzite structure has been fabricated after mechanical alloying the elemental powders for 130 min. All the diffraction peaks from elemental Cd and Se disappeared completely in those XRD patterns of as-milled CdSe nanocrystals for more than 3 h. When the mechanical alloying process was carried out for 40 h, typical zinc blende structure diffraction mode was exhibited in the XRD pattern. Structural evolution of CdSe nanocrystal with ball milling time has been discussed in detail. A phase transformation from wurtzite to zinc blende structure took place when the mechanical alloying process prolonged to 40 h. HRTEM images of the individual as-milled CdSe nanocrystals confirmed such phase transformation. The grain size of the as-milled CdSe nanocrystals ranges from 2 to 30 nm, with majority being distributed within the range from 2 to 8 nm.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:8216
Deposited By:JNCASR
Deposited On:10 Feb 2010 09:10
Last Modified:10 Feb 2010 09:10

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