Artículos de revistas
Low-temperature Photoluminescence In Self-assembled Diphenylalanine Microtubes
Registro en:
1873-2429
Physics Letters A. ELSEVIER SCIENCE BV, n. 380, n. 18-19, p. 1658 - 1662.
0375-9601
WOS:000373552000014
10.1016/j.physleta.2016.02.043
Autor
Nikitin
T; Kopyl
S; Shur
VY; Kopelevich
YV; Kholkin
AL
Institución
Resumen
Bioinspired self-assembled structures are increasingly important for a variety of applications ranging from drug delivery to electronic and energy harvesting devices. An important class of these structures is diphenylalanine microtubes which are potentially important for optical applications including light emitting diodes and optical biomarkers. In this work we present the data on their photoluminescent properties at low temperatures (down to 12 K) and discuss the origin of the emission in the near ultraviolet (UV) range seen earlier in a number of reports. UV luminescence increases with decreasing temperature and exhibits several equidistant lines that are assigned to zero-phonon exciton emission line and its phonon replicas. We infer that the exciton is localized on the defect sites and significant luminescence decay is due to thermal quenching arising from the carrier excitation from these defects and non-radiative recombination. (C) 2016 Elsevier B.V. All rights reserved. 380
1658 1662 Russian Scientific Foundation [14-12-00812] FCT/MEC [FCT UID/CTM/50011/2013] FEDER