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Proceedings Paper

Thermal -lens study of thermo-optical properties of CdSe/ZnS quantum dots embedded into PMMA matrix
Author(s): Viviane Pilla; Egberto Munin; Leandro P. Alves; Marcos T. T. Pacheco
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Paper Abstract

Thermal Lens (TL) and spectroscopic characterizations were performed in CdSe/ZnS core-shell nanoparticles embedded into the underlying polymethyl methacrylate (PMMA) dissolved in chloroform (CHCl3). TL measurements were accomplished in function of the CdSe/ZnS quantum-dot concentration (12-60 mg/ml). The average value obtained for the thermal diffusivity was (0.85 ± 0.02) x 10-3 cm2/s. The absolute nonradiative quantum efficiency φ and the fluorescence quantum efficiency η were determined by the TL method. Higher values of φ were obtained with the increase of the core-shell nanoparticles concentrations in PMMA-chloroform solutions. These results are in agreement with the behavior of fluorescence spectra that decrease with CdSe/ZnS concentration increase.

Paper Details

Date Published: 5 February 2007
PDF: 8 pages
Proc. SPIE 6481, Quantum Dots, Particles, and Nanoclusters IV, 648105 (5 February 2007); doi: 10.1117/12.701118
Show Author Affiliations
Viviane Pilla, UNIVAP (Brazil)
Egberto Munin, UNIVAP (Brazil)
Leandro P. Alves, UNIVAP (Brazil)
Marcos T. T. Pacheco, UNIVAP (Brazil)

Published in SPIE Proceedings Vol. 6481:
Quantum Dots, Particles, and Nanoclusters IV
Kurt G. Eyink; Diana L. Huffaker; Frank Szmulowicz, Editor(s)

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