Structural and optical properties improvements of PVP/gelatin blends induced by neutron irradiation
| Autor: | Mohamed Ahmed Hassan, Mohammad A. F. Basha |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Radiation
Materials science Astrophysics::High Energy Astrophysical Phenomena Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Optical conductivity 0104 chemical sciences Crystallinity Chemical engineering Neutron flux Neutron Crystallite Irradiation 0210 nano-technology Spectroscopy |
| Zdroj: | Radiation Physics and Chemistry. 146:47-54 |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2018.01.013 |
| Popis: | Blends of polyvinylpyrrolidone and gelatin were prepared in three different concentrations to study the modifications in their structural and optical properties induced by neutron irradiations with different neutron fluence values from ~ 108 up to ~ 1011 neutron/cm2. X-ray spectroscopy revealed that the irradiation has induced a recrystallization phenomenon in the studied blends and the crystallinity index increased by increasing the neutron fluence due to the breaking of the crystallites. Fourier-transform infrared spectroscopy came to confirm the existence of interactions between interchain groups and a higher compatibility for the irradiated blends. The irradiation induced defects inside the material were responsible for the change in their optical and structural properties. The creation of free radicals or ions inside the conduction bands has led to the increase in the number of carriers on localized states; this has caused the increase in optical conductivity of the irradiated blends as a result of decreasing the energy gaps by increasing the neutron fluence. Results may widen the applications of the gelatin based blends to include optoelectronic devices, organic light emitting devices, solar selective and anti-reflectance bio-coatings, optical organic glass and lenses. |
| Databáze: | OpenAIRE |
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