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Microstructure and optical band-gap of mechano-synthesized CdxZn1−xS quantum dots.
- Source :
-
Journal of Physics D: Applied Physics . 11/7/2018, Vol. 44 Issue 7, p1-1. 1p. - Publication Year :
- 2018
-
Abstract
- CdxZn1−xS (x = 0.0 to 1.0, at 0.1 interval) quantum dots (QDs) were synthesized by mechanical alloying of the stoichiometric mixture of elemental Cd, Zn and S powders at room temperature under Ar in record minimum time. The Cd0.5Zn0.5S QDs were formed after 25 min and the Cd0.1Zn0.9S QDs after 160 min of milling. The x-ray and high resolution transmission electron microscope characterizations reveal the presence of both major and minor zinc-blende and wurtzite phases and stacking faults in these QDs. Lattice parameters of both these phases decrease and the optical band-gaps increase continuously with increasing Zn concentrations. A very distinct change in colour of these QDs from blue to red is noticed with increasing Cd concentration from 0 to 1, indicating that optical band-gap varies with varying composition. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MICROSTRUCTURE
*BAND gaps
*QUANTUM dots
Subjects
Details
- Language :
- English
- ISSN :
- 00223727
- Volume :
- 44
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Physics D: Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 132206666
- Full Text :
- https://doi.org/10.1088/0022-3727/44/7/075101