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

D Grodzinska, F Pietra, MA van Huis, D Vanmaekelbergh, CD Donega

    Research output: Contribution to journalArticleScientificpeer-review

    43 Citations (Scopus)

    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 degrees C and 200 degrees 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.
    Original languageEnglish
    Pages (from-to)11556-11565
    Number of pages10
    JournalJournal of Materials Chemistry
    Volume21
    Issue number31
    Publication statusPublished - 2011

    Fingerprint Dive into the research topics of 'Thermally induced atomic reconstruction of PbSe/CdSe core/shell quantum dots into PbSe/CdSe bi-hemisphere hetero-nanocrystals'. Together they form a unique fingerprint.

  • Cite this

    Grodzinska, D., Pietra, F., van Huis, MA., Vanmaekelbergh, D., & Donega, CD. (2011). Thermally induced atomic reconstruction of PbSe/CdSe core/shell quantum dots into PbSe/CdSe bi-hemisphere hetero-nanocrystals. Journal of Materials Chemistry, 21(31), 11556-11565.