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Radiative quantum efficiency of CdSe/ZnS quantum dots suspended in different solvents
The radiative quantum efficiencies η of the CdSe/ZnS core–shell nanoparticles embedded into polymethyl methacrylate (PMMA) and suspended in three different solvents: chloroform (CHCl 3), toluene (C 6H 5CH 3) and tetrahydrofuran (C 4H 8O) were measured using thermal lens (TL) technique. The mode-mism...
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Published in: | Optics communications 2007-12, Vol.280 (1), p.225-229 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The radiative quantum efficiencies
η of the CdSe/ZnS core–shell nanoparticles embedded into polymethyl methacrylate (PMMA) and suspended in three different solvents: chloroform (CHCl
3), toluene (C
6H
5CH
3) and tetrahydrofuran (C
4H
8O) were measured using thermal lens (TL) technique. The mode-mismatched pump–probe TL measurements were accomplished in function of the CdSe/ZnS quantum-dot concentration (12–60
mg/ml) at
λ
e
=
594
nm (pump) and
λ
p
=
632.8
nm (probe). The values obtained for
η were higher for CdSe/ZnS nanoparticles suspended in tetrahydrofuran and chloroform, as compared to the values for toluene. Thermal diffusivity (
D) and the absolute nonradiative quantum efficiency (
φ) were determined. |
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ISSN: | 0030-4018 1873-0310 |
DOI: | 10.1016/j.optcom.2007.08.014 |