Tailoring the structural, optical and paramagnetic properties of GO–PVA–AgNW nanocomposites by gamma irradiation
Year: 2026
Type: article
Abstract: Co source, and the resulting morphological, structural, optical, thermal, and paramagnetic modifications were systematically investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, thermogravimetric analysis (TGA), and electron paramagnetic resonance (EPR) spectroscopy. XRD and Raman analyses revealed a pronounced reduction in crystallite size (from 1.75 to 0.92 nm) accompanied by an increase in microstrain (from 0.115 to 0.217) and defect density with increasing dose. UV-vis spectroscopy showed a progressive red shift of the absorption edge and a decrease in the optical band gap from 5.07 (pristine) to 3.82 at 1500 kGy. TGA demonstrated enhanced thermal stability of the primary polymer backbone and an increase in residual carbonaceous content from 10.15% to 14.09%, indicating that crosslinking becomes the dominant process over chain scission at high absorbed doses. EPR measurements confirmed a dose-dependent increase in the concentration of carbon-centered π-radicals, together with a narrowing of the peak-to-peak linewidth and an evolution of the asymmetry factor toward unity, reflecting enhanced spin-exchange interactions and a more homogeneous radical distribution.
Source: RSC Advances
DOI: 10.1039/d6ra06886c
Institutions: Baku State University, Institute of Metals and Technology, Jožef Stefan Institute, Jožef Stefan International Postgraduate School, Institute of Physics, Ministry of Science and Education Republic of Azerbaijan, Fizika İnstitutu Publik Hüquqi Şəxs, Azerbaijan Medical University, Azerbaijan University of Architecture and Construction, Institute of Catalysis and Inorganic Chemistry, Institute of Molecular Biology
Language: English
Subfield: Polymers and Plastics
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,042
OpenAlex ID: W7203784302