Gamma irradiation effect on the optical properties of GexSb40-xS60 chalcogenide glasses

2001 ◽  
Author(s):  
Oleh I. Shpotyuk ◽  
Taras S. Kavetskyy ◽  
Andriy P. Kovalskiy ◽  
Vesela Pamukchieva
Keyword(s):  
Optical Properties ◽  
Gamma Irradiation ◽  
Chalcogenide Glasses ◽  
Irradiation Effect

Gamma irradiation effect towards photoluminescence and optical properties of Makrofol DE 6-2

2020 ◽  
Vol 168 ◽  
pp. 108578 ◽  
Author(s):  
I.A. El-Mesady ◽  
Y.S. Rammah ◽  
A.M. Abdalla ◽  
E.H. Ghanim
Keyword(s):  
Optical Properties ◽  
Gamma Irradiation ◽  
Irradiation Effect

IR optical properties of Sb2S3-GeS2(Ge2S3) chalcogenide glasses and effect of gamma irradiation

2001 ◽  
Author(s):  
Oleh I. Shpotyuk ◽  
Taras S. Kavetskyy ◽  
Andriy P. Kovalskiy ◽  
Vesela Pamukchieva
Keyword(s):  
Optical Properties ◽  
Gamma Irradiation ◽  
Chalcogenide Glasses

Optical Properties Changes of Ternary Glasses: Gamma Irradiation Effect

2016 ◽  
Vol 840 ◽  
pp. 118-123 ◽  
Author(s):  
Azuraida Amat ◽  
Halimah Mohamed Kamari ◽  
Che Azurahanim Che Abdullah ◽  
Mansor Ishak ◽  
Shahrim Mustafa Iskandar ◽  
...  
Keyword(s):  
Optical Properties ◽  
Gamma Irradiation ◽  
Gamma Ray ◽  
Amorphous State ◽  
Ftir Spectra ◽  
Irradiation Effect ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Structural Bonding ◽  
The Fourier Transform

Research on tellurite based glass has become important because of it potential in photonic and shielding material. In this work, the changes of the optical properties of ternary tellurite glasses when radiated with 25kGy gamma ray dose were studied. Five glass samples, with composition [(TeO2)70 (B2O3)30]100-x (Bi2O3)x (where x = 5, 10, 15, 20 and 25 mol%) were prepared by melt quenching technique. The optical properties were studied by UV-Visible absorption. The X-Ray Diffraction (XRD) spectra result shows that all glass samples fit the amorphous state. The Fourier Transform Infrared Spectroscopy (FTIR) was used to explore the structural bonding in the prepared glass samples due to exposure. Gamma irradiation causes a profound change in the peak intensity as shown by FTIR spectra which is due to the breaking of the network bonding. Before gamma irradiation, the optical band gap, Eg value decreased from 2.50 eV to 2.30 eV with the addition of Bismuth content. The value kept decreasing (from 2.18 eV to 2.05 eV) following exposure to 25 kGy gamma irradiation due to the increase of non-bridging oxygen (NBO) and the increase of defect in the glass. The finding suggest that the glass with high content of Bi2O3 (25 Bi) give smallest Eg and show less changes (less defect) in FTIR spectra after gamma irradiation which indicate that this glass is more resistant to 25 kGy gamma irradiation dose compared to other glasses.

Effect of gamma radiation on the structural, thermal and optical properties of PMMA/Sn0.75Fe0.25S2 nanocomposite

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali A. Alhazime ◽  
Nesreen T. El-Shamy ◽  
Kaoutar Benthami ◽  
Mai ME. Barakat ◽  
Samir A. Nouh
Keyword(s):  
Thermal Stability ◽  
Optical Properties ◽  
Gamma Irradiation ◽  
Optical Band Gap ◽  
Color Variation ◽  
Nanocomposite Films ◽  
Color Changes ◽  
Gamma Irradiated ◽  
Intermolecular Crosslinking ◽  
Amorphous Part

AbstractNanocomposite films of polymethylmethacrylate PMMA with Sn0.75Fe0.25S2 nanoparticles (NPs) were fabricated by both thermolysis and casting techniques. Changes in PMMA/Sn0.75Fe0.25S2 nanocomposite (NCP) due to gamma irradiation have been measured. XRD results indicate that the gamma doses of 10–80 kGy cause intermolecular crosslinking that reduces the ordered portion in the NPs. Bonding between the NPs and the host PMMA was confirmed by FTIR. TGA results indicate an enhancement in thermal stability in the NCP films irradiated with doses 20–80 kGy. The optical band gap was reduced from 3.23 to 2.47 eV upon gamma irradiation up to 80 kGy due bonding between the NPs and PMMA which enhanced the amorphous part of the NPs. Finally, the color variation between the blank and irradiated films (ΔE) was determined. Color changes immensely when the PMMA/Sn0.75Fe0.25S2 NCP films are gamma irradiated. Values of ΔE were as much as 31.6 which is an acceptable match in commercial reproduction on printing presses.

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