Tailoring the physical properties of thiol-capped PbS quantum dots by thermal annealing

L. Turyanska*, U. Elfurawi, M. Li, M. W. Fay, N. R. Thomas, S. Mann, J. H. Blokland, P. C. M. Christianen, A. Patane

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

24 Citations (Scopus)

Abstract

We show that the thermal annealing of thiol-capped PbS colloidal quantum dots provides a means of narrowing the nanoparticle size distribution, increasing the size of the quantum dots and facilitating their coalescence preferentially along the <100 > crystallographic axes. We exploit these phenomena to tune the photoluminescence emission of an ensemble of dots and to narrow the optical linewidth to values that compare with those reported at room temperature for single PbS quantum dots. We probe the influence of annealing on the electronic properties of the quantum dots by temperature dependent studies of the photoluminescence and magneto-photoluminescence.

Original languageEnglish
Article number315604
Number of pages5
JournalNanotechnology
Volume20
Issue number31
DOIs
Publication statusPublished - 5 Aug 2009

Keywords

  • NANOPARTICLES
  • SPECTROSCOPY
  • NANOCRYSTALS
  • SHIFT

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