Jump to main content
Jump to site search

Issue 31, 2011
Previous Article Next Article

Thermally induced atomic reconstruction of PbSe/CdSe core/shell quantum dots into PbSe/CdSe bi-hemisphere hetero-nanocrystals

Author affiliations

Abstract

The properties of hetero-nanocrystals (HNCs) depend strongly on the mutual arrangement of the nanoscale components. In this work we have investigated the structural and morphological evolution of colloidal PbSe/CdSe core/shell quantum dots upon annealing under vacuum. Prior to annealing the PbSe core has an approximately octahedral morphology with eight {111} facets, and the CdSe shell has zinc-blende crystal structure. Thermal annealing under vacuum at temperatures between 150 °C and 200 °C induces a structural and morphological reconstruction of the HNCs whereby the PbSe core and the CdSe shell are reorganized into two hemispheres joined by a common {111} Se plane. This thermally induced reconstruction leads to considerable changes in the optical properties of the colloidal PbSe/CdSe HNCs.

Graphical abstract: Thermally induced atomic reconstruction of PbSe/CdSe core/shell quantum dots into PbSe/CdSe bi-hemisphere hetero-nanocrystals

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Dec 2010, accepted on 23 Mar 2011 and first published on 21 Apr 2011


Article type: Paper
DOI: 10.1039/C0JM04458J
J. Mater. Chem., 2011,21, 11556-11565

  •   Request permissions

    Thermally induced atomic reconstruction of PbSe/CdSe core/shell quantum dots into PbSe/CdSe bi-hemisphere hetero-nanocrystals

    D. Grodzińska, F. Pietra, M. A. van Huis, D. Vanmaekelbergh and C. de Mello Donegá, J. Mater. Chem., 2011, 21, 11556
    DOI: 10.1039/C0JM04458J

Search articles by author

Spotlight

Advertisements