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 language | English |
|---|---|
| Pages (from-to) | 7872-7877 |
| Number of pages | 6 |
| Journal | Chemistry of Materials |
| Volume | 28 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - Nov 8 2016 |
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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 journal › Article
}
TY - JOUR
T1 - Revisiting the Anion Framework Conservation in Cation Exchange Processes
AU - Meir, Noga
AU - Martín-García, Beatriz
AU - Moreels, Iwan
AU - Oron, Dan
PY - 2016/11/8
Y1 - 2016/11/8
N2 - 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.
AB - 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.
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U2 - 10.1021/acs.chemmater.6b03332
DO - 10.1021/acs.chemmater.6b03332
M3 - Article
VL - 28
SP - 7872
EP - 7877
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 21
ER -