Share Email Print

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
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

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)

© SPIE. Terms of Use
Back to Top