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Effect of Cd/Te Ratio on the Formation of CdTe Magic-Sized Quantum Dots during Aggregation.
- Source :
-
Journal of Physical Chemistry A . Aug2008, Vol. 112 Issue 39, p9304-9311. 8p. - Publication Year :
- 2008
-
Abstract
- In this study, the aggregation dynamics of magic-sized CdTe quantum dots is investigated. The experiments show that the growth kinetics of the quantum dots is very sensitive to the Cd/Te ratio. The crossover from tellurium-rich to cadmium-rich conditions produces a very different aggregation pattern, which can be explained by the lack of formation of magic-sized nanoparticles during the reaction conditions. A simple simulation that includes both monomer-induced growth and aggregation growth is presented to reproduce the experimentally observed aggregation patterns. The simulation results strongly suggest that the experimental aggregation pattern can be reproduced if initially a double magic-sized distribution is assumed. The numerical data clearly show that the aggregation is enhanced by the dipoleādipole interaction. Simulations also suggest that the neck formation of the CdTe quantum dot aggregates is unlikely under the experimental conditions. The absence of neck formation is in agreement with the expectations during high-temperature synthesis. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM electronics
*ELECTRON optics
*QUANTUM electrodynamics
*MASERS
Subjects
Details
- Language :
- English
- ISSN :
- 10895639
- Volume :
- 112
- Issue :
- 39
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 34490775
- Full Text :
- https://doi.org/10.1021/jp802254n