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- Title
Structural, optical, and electrical enhancement of polyethylene oxide (PEO) and sodium alginate (NaAlg) through embedding silver nanoparticles (Ag NP) for optoelectrical applications.
- Authors
Ragab, H. M.; Farea, M. O.
- Abstract
Researchers have recently become interested in polymer-based energy storage. Using the sol–gel method, we prepared silver nanoparticles (Ag NP) as nanofillers with filling levels of up to 6 wt%. Subsequently, a nanocomposite film was synthesized by incorporating these Ag NP into a host polymeric blend matrix of Polyethylene oxide (PEO) and Sodium alginate (NaAlg) using solution casting. The PEO:NaAlg weight ratio was 50:50. The X-ray diffraction analysis of nanocomposite films containing silver nanoparticles revealed that the films’ crystallinity decreased as the content of silver nanoparticles increased. The optical absorption spectra showed a noteworthy decrease in the optical bandgap for the permitted direct transition upon the incorporation of Ag NP. Specifically, the energy gap reduced from 4.78 eV in the pure PEO/NaAlg matrix to 4.36 eV in the nanocomposite film with a 6 wt% content of Ag NP as nanofillers. Upon incorporating the Ag NP, the nanocomposite films exhibited significant improvements in various electrical and dielectric properties. Both AC electrical conductivity (σac) and DC electrical conductivity (σdc) values increased notably, with σdc rising from 4.65 × 10–11 S cm−1 in the pure PEO/NaAlg blend to 7.52 × 10–9 S cm−1 in nanocomposites containing 6 wt% Ag NP. Additionally, the dielectric constant (ε′) and dielectric loss (ε″) values also showed enhancement after the addition of Ag NP. The study shows that PEO/NaAlg–Ag nanocomposite films have potential for enhancing polymer-based capacitors used in energy storage.
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 31, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-11524-1