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Effect of Ligand Exchange on the Stability and Optical Properties of CdSe Quantum Dots

Published online by Cambridge University Press:  01 February 2011

Jacqueline T. Siy ,
Lindsay Leone  and
Michael H. Bartl
Jacqueline T. Siy
Affiliation:
[email protected], University of Utah, Department of Chemistry, 315 South 1400 East, Rm 2020, Salt Lake City, UT, 84112, United States
Lindsay Leone
Affiliation:
[email protected], University of Utah, Department of Chemistry, 315 South 1400 East, Rm 2020, Salt Lake City, UT, 84112, United States
Michael H. Bartl
Affiliation:
[email protected], University of Utah, Department of Chemistry, 315 South 1400 East, Rm 2020, Salt Lake City, UT, 84112, United States
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Abstract

A new post-synthesis heat/ligand-exchange treatment on CdSe nanocrystal quantum dots that allows fine-tuning the quantum dots size without losing important properties (e.g. photoluminescence) is presented. The careful control of parameters such as the reaction temperature, the quantum dot to alkyl-amine ligand mole ratio and the solvent volume is shown to provide tunable size reduction of the nanocrystals. This size reduction phenomenon provides new insights into the surface chemistry and stability of nanocrystals and can serve as a platform for designing, controlling and processing nanomaterials with tailored properties.

Keywords

nanoscalesemiconductingcrystal growth
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH07-03
Copyright
Copyright © Materials Research Society 2008

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References

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