Influence of gamma irradiation on photoluminescence properties of polycarbonate films doped with Eu3+-β-diketonate complex

Forster, Pedro Lima; Parra, D.F.; Jiang, Kai; Brito, Hermi F.; Lugão, Ademar B.

doi:10.1016/j.radphyschem.2012.06.046

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…Other investigations on the luminescence properties of lanthanide-based systems with NPs, nanorods or systems assembled using sol-gel techniques have been reported in the literature [17,22,27,33,34,38,40,43,45,49,50,60,61,67,73,78,82,88,93,107,[127][128][129]133,136,140,142,143,149,163,[169][170][171]176,178,201,211,212,214,[235][236][237][238][239][240][241][242][243][244][245]…”

Section: Nanoparticles Nanorods and Sol-gel Processmentioning

confidence: 99%

Recent advances in lanthanide spectroscopy in Brazil

Silva

Capelo

Albuquerque

2016

Journal of Luminescence

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a b s t r a c tThis rev Q2 iew discusses recent advances in lanthanide spectroscopy involving luminescence applications carried out in Brazil. The revised topics include glasses, sol-gel, light-emitting diodes, nanoparticles, metal-organic frameworks, coordination polymers, thin films, energy transfer processes, upconversion and development of new theoretical tools. The important role played by Prof. Oscar L. Malta on this subject is evidenced by his many contributions to the broad range of investigations reported here and this review is dedicated to him, on the occasion of his 60th birthday.& 2015 Published by Elsevier B.V.

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Section: Nanoparticles Nanorods and Sol-gel Processmentioning

confidence: 99%

Recent advances in lanthanide spectroscopy in Brazil

Silva

Capelo

Albuquerque

2016

Journal of Luminescence

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“…These findings provide valuable insights into the effects of gamma irradiation on conjugated copolymers and their potential applications in optoelectronics. In their research, Forster et al [34] explored the impact of gamma irradiation on luminescent films created by incorporating the [Eu(tta) 3 (H 2 O) 2 ] complex into a polycarbonate matrix. The luminescent films were subjected to varying doses of gamma radiation, and alterations in their luminescence properties were observed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Gamma Irradiation on Optical Properties of Poly(ethylene oxide) Thin Films Doped with Potassium Iodide

et al. 2023

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In this study, the effect of gamma irradiation on the optical properties of thin films of polymer electrolytes was investigated. The thin films were composed of poly(ethylene oxide) (PEO) doped with different concentrations of potassium iodide (KI) salt. The optical absorption spectrum of each film was measured using a UV–Vis spectrophotometer over a range of 300 to 800 nm. The PEO thin-film samples were subjected to gamma irradiation at two different doses of 100 and 200 Gy generated by a Co-60 source. It was found that the optical properties of the thin films were significantly influenced by the KI dopant concentration and gamma irradiation. Increasing both the KI concentration and the gamma irradiation dose resulted in a reduction in the energy gap and an increase in the absorption coefficient, extinction coefficient, refractive index, and dielectric constant of the PEO electrolyte. These findings have potential applications in the optimization of polymers for use in optical devices and energy storage systems.

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“…Irradiation is a more appropriate technique of choice than other routes due to its many advantages. Chemical initiation often requires catalysts or additives to initiate the reaction, but these are not needed to initiate the irradiation process . γ‐Irradiation of polymers causes a change in molecular mass through chain scission and crosslinking, For chain scission, the molecular mass decreases and can be observed at low γ‐radiation doses, whereas crosslinking implies an increase in molecular mass with the formation of free radicals.…”

Section: Introductionmentioning

confidence: 99%

Effect of γ‐irradiation on thermal and thermoluminescence properties of polystyrene/europium (III) oxide composite film

Bhavsar

Singh

2019

Luminescence

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In the present study, polystyrene:europium (III) oxide polymer films at a ratio of 95:5 wt% were prepared using a solution casting technique. These polymeric films were irradiated with 5, 25 and 50 kGy γ-radiation doses and their thermoluminescence (TL) and thermal properties were studied as a function of radiation dose. Analysis of Fourier transform infrared spectra revealed different modes of vibration and polymer-filler interaction. Reduction of vibrational modes with radiation dose was observed. The TL glow curve intensity was observed to increase with increasing radiation dose and to become broader in the 378 K and 444 K regions. Detrapping of electrons implied by the glow curve was caused by thermally induced macromolecular motion, concurrent with β-relaxation in polystyrene. The TL glow curve parameters were computed using a glow curve deconvolution method. Differential scanning calorimetry analysis indicated that the glass transition temperature (T g ) increased with increase in dose, suggesting crosslinking of the polymer chain. Scanning electron microscopy analysis evidenced the change in surface morphology due to γirradiation. K E Y W O R D S europium (III) oxide, γ-irradiation, polystyrene, thermoluminescence 1 | INTRODUCTION Polymers have received more attention and increased interest from scientists and researchers for potential application in the fields of science and technology. Compared with other host matrices, polymers have become a more favourable host matrix for optical and electronic applications. Devices made from polymers have become more flexible, are of high mechanical strength, and are light in weight. In this study, polystyrene (PS) was used as a host because of its excellent mechanical strength, good thermal resistance, and good chemical stability. As per requirement, alterations in the properties of polymer can be carried out by doping with metal oxides such as Al 2 O 3 , ZnO and TiO 2 .But rather than using metal oxides, rare earth ions are more useful because they show vibronic characteristics in the optical spectrum.Among all rare earth ions, Eu 3+ ions are widely used due to their electronic transition of excitation, emission, and absorption spectra, caused by the occurrence of vibronic characteristics. [1] However, rare

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Influence of gamma irradiation on photoluminescence properties of polycarbonate films doped with Eu3+-β-diketonate complex

Cited by 14 publications

References 16 publications

Recent advances in lanthanide spectroscopy in Brazil

Recent advances in lanthanide spectroscopy in Brazil

Effects of Gamma Irradiation on Optical Properties of Poly(ethylene oxide) Thin Films Doped with Potassium Iodide

Effect of γ‐irradiation on thermal and thermoluminescence properties of polystyrene/europium (III) oxide composite film

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