Impact of γ-rays Irradiation on Hybrid TiO2-SiO2 Sol-Gel Films Doped with RHODAMINE 6G - Université Jean-Monnet-Saint-Étienne Access content directly
Journal Articles Materials Year : 2021

Impact of γ-rays Irradiation on Hybrid TiO2-SiO2 Sol-Gel Films Doped with RHODAMINE 6G

Francis Vocanson
Damien Jamon
Emmanuel Marin
Adriana Morana
Cosimo Campanella
Aziz Boukenter
Youcef Ouerdane
Yves Jourlin
Sylvain Girard

Abstract

In the present paper, we investigate how the optical and structural properties, in particular the observed photoluminescence (PL) of photocurable and organic-inorganic TiO2-SiO2 sol-gel films doped with Rhodamine 6G (R6G) are affected by γ-rays. For this, four luminescent films, firstly polymerized with UV photons (365 nm), were submitted to different accumulated doses of 50 kGy, 200 kGy, 500 kGy and 1 MGy while one sample was kept as a reference and unirradiated. The PL, recorded under excitations at 365 nm, 442 nm and 488 nm clearly evidences that a strong signal peaking at 564 nm is still largely present in the γ-irradiated samples. In addition, M-lines and Fourier-transform infrared (FTIR) spectroscopies are used to quantify the radiation induced refractive index variation and the chemical changes, respectively. Results show that a refractive index decrease of 7 × 10−3 at 633 nm is achieved at a 1 MGy accumulated dose while a photo-induced polymerization occurs, related to the consumption of CH=C, Si-OH and Si-O-CH3 groups to form Ti-O and Si-O bonds. All these results confirm that the host matrix (TiO2-SiO2) and R6G fluorophores successfully withstand the hard γ-ray exposure, opening the way to the use of this material for sensing applications in radiation-rich environments.

Dates and versions

ujm-03466364 , version 1 (05-12-2021)

Identifiers

Cite

Maxime Royon, Francis Vocanson, Damien Jamon, François Royer, Emmanuel Marin, et al.. Impact of γ-rays Irradiation on Hybrid TiO2-SiO2 Sol-Gel Films Doped with RHODAMINE 6G. Materials, 2021, 14 (19), pp.5754. ⟨10.3390/ma14195754⟩. ⟨ujm-03466364⟩
20 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More