Revisiting the Anion Framework Conservation in Cation Exchange Processes

Noga Meir, Beatriz Martín-García, Iwan Moreels, Dan Oron

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We investigated the effect of cation exchange on the anionic framework of lightly doped CdSe:Te/CdS nanorods. In contrast with previously studied core/shell systems, the Te dopant, located in the center of the CdSe core, provides an extremely sensitive indicator for any structural changes of the anionic framework that may occur as a result of the cation exchange process. We first optimized the cation exchange procedure in order to retain the fluorescence properties of the CdSe:Te/CdS nanorods after exchange of Cd2+ for Cu+ and back to Cd2+. Next, using multiexciton spectroscopy, we were able to probe the magnitude of the exciton-exciton repulsion interaction and use that to assess the degree of crystal structure conservation. Our findings provide a much stronger proof that the anion framework is indeed rigid, showing no evidence of significant migration of the anionic dopant.

Original languageEnglish
Pages (from-to)7872-7877
Number of pages6
JournalChemistry of Materials
Volume28
Issue number21
DOIs
Publication statusPublished - Nov 8 2016

Fingerprint

Anions
Cations
Conservation
Ion exchange
Negative ions
Positive ions
Nanorods
Excitons
Doping (additives)
Crystal structure
Fluorescence
Spectroscopy
LDS 751

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Revisiting the Anion Framework Conservation in Cation Exchange Processes. / Meir, Noga; Martín-García, Beatriz; Moreels, Iwan; Oron, Dan.

In: Chemistry of Materials, Vol. 28, No. 21, 08.11.2016, p. 7872-7877.

Research output: Contribution to journalArticle

Meir, Noga ; Martín-García, Beatriz ; Moreels, Iwan ; Oron, Dan. / Revisiting the Anion Framework Conservation in Cation Exchange Processes. In: Chemistry of Materials. 2016 ; Vol. 28, No. 21. pp. 7872-7877.
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