Thermo-Optical Characterization of Cadmium Selenide/Zinc Sulfide (CdSe/ZnS) Quantum Dots Embedded in Biocompatible Materials

Author(s)

Pilla, Viviane ^[1] ; Alves, Leandro P. ^[2] ; Iwazaki, Adalberto N. ^[2] ; Andrade, Acacio A. ^[1] ; Antunes, Andrea ^[1] ; Munin, Egberto ^[2]

Affiliation

^[1] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG - Brazil

^[2] Univ Camilo Castelo Branco, Ctr Engn Biomed, BR-12247004 Sao Jose Dos Campos, SP - Brazil

• Document type: Journal article
• Source: Applied Spectroscopy; v. 67, n. 9, p. 997-1002, SEP 2013.
• Web of Science Citations: 3

Abstract

Cadmium selenide/zinc sulfide (CdSe/ZnS) core-shell quantum dots (QDs) embedded in biocompatible materials were thermally and optically characterized with a thermal lens (TL) technique. Transient TL measurements were performed with a mode-mismatched, dual-beam (excitation and probe) configuration. A thermo-optical study of the CdSe/ZnS QDs was performed for different core diameters (3.5, 4.0, 5.2, and 6.6 nm) in aqueous solution and synthetic saliva, and three different core diameters (2.4, 2.9, and 4.1 mu) embedded in restorative dental resin (0.025% by mass). The thermal diffusivity results are characteristic of the biocompatible matrices. The radiative quantum efficiencies for aqueous solution and biofluid materials are dependent on the core size of the CdSe/ZnS core-shell QDs. The results obtained from the fluorescence spectral measurements for the biocompatible materials support the TL results. (AU)

• FAPESP's process: 06/01277-2 - Nonlinear spectroscopy in quantum dots functionalized for biological applications
• Grantee: Viviane Pilla
• Support Opportunities: Regular Research Grants