| Full text | |
| Author(s): |
de Thomaz, A. A.
;
Almeida, D. B.
;
Pelegati, V. B.
;
Carvalho, H. F.
;
Moreira, S. G. C.
;
Barbosa, L. C.
;
Cesar, C. L.
Total Authors: 7
|
| Document type: | Journal article |
| Source: | JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 49, n. 47, p. 1-5, NOV 1 2016. |
| Web of Science Citations: | 0 |
| Abstract | |
In this work, we unequivocally demonstrate the influence of matrix-related stresses on quantum dots by measuring, side by side, a CdTe quantum dot doped glass and a colloidal sample with similar sizes. We measured the fluorescence spectra and fluorescence lifetime for both samples as a function of the temperature. We show that the expansion coefficient mismatch between CdTe quantum dots and the glass host causes stresses and drastically changes its behavior compared to its colloidal counterpart, even leading to phase transitions. This finding indicates that most experimental data on glass-doped quantum dots used to validate confinement models should be revised, taking stress into account. (AU) | |
| FAPESP's process: | 05/51689-2 - Optics and Photonics Research Center at UNICAMP |
| Grantee: | Hugo Luis Fragnito |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 11/51959-0 - Biology of neoplastic diseases of bone marrow |
| Grantee: | Sara Teresinha Olalla Saad |
| Support Opportunities: | Research Projects - Thematic Grants |