A Critical Investigation on the Existence of Selective Microwave Absorption in the Synthesis of CdSe Quantum Dots

Mojtaba Mirhosseini Moghaddam; C. Oliver Kappe

doi:10.1071/CH14071

RESEARCH ARTICLE

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A Critical Investigation on the Existence of Selective Microwave Absorption in the Synthesis of CdSe Quantum Dots

Mojtaba Mirhosseini Moghaddam ^A and C. Oliver Kappe ^A ^B

+ Author Affiliations

- Author Affiliations

^A Christian Doppler Laboratory for Microwave Chemistry (CDLMC) and Institute of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria.

^B Corresponding author. Email: oliver.kappe@uni-graz.at

Australian Journal of Chemistry 67(9) 1180-1188 https://doi.org/10.1071/CH14071
Submitted: 10 January 2014 Accepted: 19 February 2014 Published: 10 April 2014

Abstract

The existence of selective microwave absorption phenomena in the synthesis of CdSe quantum dots has been investigated. These types of microwave effects involving selective microwave absorption by specific reagents have recently been proposed in the microwave-assisted synthesis of various nanoparticles. In the present study, the microwave synthesis of CdSe quantum dots was investigated according to a protocol published by Washington and Strouse to clarify the presence of selective microwave heating. Importantly, control experiments involving conventional conductive heating were executed under otherwise (except for the heating mode) identical conditions, ensuring the same heating and cooling profiles, stirring rates, and reactor geometries. Comparison of powder X-ray diffraction, UV-vis, photoluminescence, and transmission electron microscopy data of the obtained CdSe quantum dots reveals that identical types of nanoparticles are obtained independently of the heating mode. Therefore, no evidence for a selective microwave absorption phenomenon could be obtained.

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A Critical Investigation on the Existence of Selective Microwave Absorption in the Synthesis of CdSe Quantum Dots

Abstract

References

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