Role of free volume on nonlinear optical properties of PSAN/NiO polymer nanocomposites

Boranna, M. P. and Mahesh, S. S. and Gummagol, Neelamma B. and Patil, Parutagouda Shankaragouda and Ravikumar, H. B. (2026) Role of free volume on nonlinear optical properties of PSAN/NiO polymer nanocomposites. Materials Science and Engineering: B, 323. p. 118864. ISSN 0921-5107

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Abstract

This research investigates the nonlinear optical (NLO) properties of Poly (styrene-co-acrylonitrile) (PSAN) /Nickel Oxide nanoparticles (NiO) polymer nanocomposites (PNCs) at various (NiO) nanoparticles wt (0.0, 0.2, 0.4, 0.6, 0.8 and 1.0). This study employs analytical techniques to examine the influence of NiO nanoparticles on the microstructure and nonlinear optical behavior of PSAN/NiO PNCs. The results reveal that PSAN/NiO PNCs at 1.0Â wt of NiO nanofiller loading exhibit lowest energy band gap, bigger free volumes and highest nonlinear optical parameters. The reduced energy band gap due to localized energy states which increase the probability of two-photon absorption (TPA) and enhance the nonlinear optical absorption. Similarly, bigger free volumes promotes the dipole polarization by accommodating dipole orientation w.r.t the applied optical field. The PSAN/NiO PNCs with 1.0Â wt of NiO nanofiller loading demonstrates strong optical limiting due to the two-photon absorption and defocusing effects.

Item Type:	Article
Uncontrolled Keywords:	Nonlinear absorption, Free volume, Positron, Lifetime, band gap, Optical limiting
Subjects:	D Physical Science > Material Science
Divisions:	Department of > Physics
Depositing User:	C Swapna Library Assistant
Date Deposited:	12 Nov 2025 06:24
Last Modified:	12 Nov 2025 06:24
URI:	http://eprints.uni-mysore.ac.in/id/eprint/17918

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