Thermo-optical properties of magic-sized quantum dots in aqueous solutions

Sthanley R. de Lima; Viviane Pilla; Acácio A. Andrade; Anielle C. A. Silva; Noelio O. Dantas

doi:10.1117/12.2004213

22 February 2013 Thermo-optical properties of magic-sized quantum dots in aqueous solutions

Sthanley R. de Lima, Viviane Pilla, Acácio A. Andrade, Anielle C. A. Silva, Noelio O. Dantas

Proceedings Volume 8595, Colloidal Nanocrystals for Biomedical Applications VIII; 85951I (2013) https://doi.org/10.1117/12.2004213
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

The quantum dots (QDs) for use in nanobiotechnology trials should be thermodynamically stable and have homogeneous dispersion, high radiative quantum efficiency (η), a very broad absorption spectrum, low levels of nonspecific links to biological compounds and, most importantly, stability in aqueous media. Recently, a new class of CdSe QDs called magic-sized quantum dots (MSQDs), with sizes from 1 to 2 nm and well-defined structures, has attracted considerable attention because of its novel physical properties. The present work reports the thermo-optical properties of CdSe/CdS MSQDs and CdSe/ZnS QDs suspended in aqueous solutions. Absolute nonradiative quantum efficiency (φ) and η values were determined applying two techniques: the well-known Thermal Lens (TL) technique and an alternative method called thermal spatial self-phase modulation (TSPM) technique.

Citation Download Citation

Sthanley R. de Lima, Viviane Pilla, Acácio A. Andrade, Anielle C. A. Silva, and Noelio O. Dantas "Thermo-optical properties of magic-sized quantum dots in aqueous solutions", Proc. SPIE 8595, Colloidal Nanocrystals for Biomedical Applications VIII, 85951I (22 February 2013); https://doi.org/10.1117/12.2004213

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