Collection of scientific works Nanosystems, nanomaterials, nanotechnologies Year 2023 Volume 21, Issue 2
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Majeed Ali Habeeb and Zanab Ibrahim Zike
Evaluation of Structural and Optical Properties of PVA/Fe2O3 Nanostructures for Photonic Devices
0301–0311 (2023)

PACS numbers: 42.70.Qs, 78.20.Ci, 78.40.-q, 78.66.Sq, 78.67.Sc, 81.07.Pr, 82.35.Np

The PVA/Fe2O3 nanocomposites are formed using a solution casting method with varying weight percentages of Fe2O3 nanoparticles: 0, 2, 4, and 6 wt.%. The optical microscopy and optical properties for films are studied; the results reveal that the nanoparticles form a continuous network in films of polyvinyl alcohol (PVA); the nanoparticles are linked in this network including routes for charge carriers to travel through it, causing a shift in the material properties. The findings reveal that, as the concentration of Fe2O3 nanoparticles rises, the absorbance, absorption coefficient, extinction coefficient, refractive index, real and imaginary dielectric constants and optical conductivity are increasing. The optical energy gap for PVA is reduced from 4.4 eV for pure PVA to 3.7 eV when Fe2O3 nanoparticles’ concentration reaches 6 wt.%. This behaviour makes it suitable for variety optical approaches. The transmittance drops as the concentration of Fe2O3 nanoparticles increases.

Key words: polyvinyl alcohol, iron oxide nanoparticles, nanocomposites, optical characteristics.

https://doi.org/10.15407/nnn.21.02.301

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