Heat-induced transformation of CdSe-CdS-ZnS core-multishell quantum dots by Zn diffusion into inner layers

Anil O Yalcin; Bart Goris; Relinde J A van Dijk-Moes; Zhaochuan Fan; Ahmet K Erdamar; Frans D Tichelaar; Thijs J H Vlugt; Gustaaf Van Tendeloo; Sara Bals; Daniël Vanmaekelbergh; Henny W Zandbergen; Marijn A van Huis

doi:10.1039/c4cc08647c

Heat-induced transformation of CdSe-CdS-ZnS core-multishell quantum dots by Zn diffusion into inner layers

Chem Commun (Camb). 2015 Feb 25;51(16):3320-3. doi: 10.1039/c4cc08647c.

Authors

Anil O Yalcin¹, Bart Goris, Relinde J A van Dijk-Moes, Zhaochuan Fan, Ahmet K Erdamar, Frans D Tichelaar, Thijs J H Vlugt, Gustaaf Van Tendeloo, Sara Bals, Daniël Vanmaekelbergh, Henny W Zandbergen, Marijn A van Huis

Affiliation

¹ Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands. [email protected].

PMID: 25431813
DOI: 10.1039/c4cc08647c

Abstract

In this work, we investigate the thermal evolution of CdSe-CdS-ZnS core-multishell quantum dots (QDs) in situ using transmission electron microscopy (TEM). Starting at a temperature of approximately 250 °C, Zn diffusion into inner layers takes place together with simultaneous evaporation of particularly Cd and S. As a result of this transformation, CdxZn1-xSe-CdyZn1-yS core-shell QDs are obtained.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cadmium Compounds / chemistry*
Diffusion
Hot Temperature*
Quantum Dots / chemistry*
Selenium Compounds / chemistry*
Sulfides / chemistry*
Zinc / chemistry*
Zinc Compounds / chemistry*

Substances

Cadmium Compounds
Selenium Compounds
Sulfides
Zinc Compounds
cadmium sulfide
cadmium selenide
Zinc
zinc sulfide