Quantum dots protected from oxidative attack using alumina shells synthesized by atomic layer deposition

B. Yin; B. Sadtler; M. Y. Berezin; E. Thimsen

doi:10.1039/C6CC05090E

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Quantum dots protected from oxidative attack using alumina shells synthesized by atomic layer deposition†

B. Yin,^a B. Sadtler,^ab M. Y. Berezin^ac and E. Thimsen*^ad

Author affiliations

* Corresponding authors

^a Institute of Materials Science and Engineering, Washington University in Saint Louis, Saint Louis, MO 63130, USA

^b Department of Chemistry, Washington University in Saint Louis, Saint Louis, MO 63130, USA

^c Mallinckrodt Institute of Radiology, Washington University in Saint Louis, Saint Louis, MO 63130, USA

^d Department of Energy, Environmental and Chemical Engineering, Washington University in Saint Louis, Saint Louis, MO 63130, USA
E-mail: elijah.thimsen@wustl.edu
Tel: +1 314 935 6103

Abstract

Applications of luminescent quantum dots require the materials to be stable under a wide range of temperatures, photon fluxes and chemical environments. In this work, we demonstrate that Al₂O₃ shells synthesized by atomic layer deposition on films of CdTe quantum dots are effective to prevent chemical degradation for up to 17 hours under continuous illumination at 90 °C in ambient air. Control samples with no Al₂O₃ coating experienced extensive oxidation and severe quenching of the photoluminescence intensity under these conditions.

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Article information

DOI: https://doi.org/10.1039/C6CC05090E
Article type: Communication
Submitted: 20 Jun 2016
Accepted: 18 Aug 2016
First published: 23 Aug 2016

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Chem. Commun., 2016,52, 11127-11130

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Quantum dots protected from oxidative attack using alumina shells synthesized by atomic layer deposition

B. Yin, B. Sadtler, M. Y. Berezin and E. Thimsen, Chem. Commun., 2016, 52, 11127 DOI: 10.1039/C6CC05090E

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Chemical Communications

Quantum dots protected from oxidative attack using alumina shells synthesized by atomic layer deposition†

Abstract

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Quantum dots protected from oxidative attack using alumina shells synthesized by atomic layer deposition

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