Scholarlink

<p>The study inspected the thermal, optical, and dielectric activity of films made of pure PVA and PVA-based nanocomposites (NCs). The experimental findings demonstrate that variations in the dopants CuO, Er<sub>2</sub>O<sub>3</sub>, and Al<sub>2</sub>O<sub>3</sub> have a significant impact on the optical and dielectric characteristics. For the PVA-based NCs, there was a significant change in the absorption edge toward higher energy. In PVA, the absorption edge reaches 3.85 eV and then changes to 5.45 eV in PVA–Al<sub>2</sub>O<sub>3</sub> NC. It was found that the addition of Al<sub>2</sub>O<sub>3</sub>, Er<sub>2</sub>O<sub>3</sub>, and CuO dopants considerably widens the optical bandgap compared to pure PVA. Refractive index reduction with inserted dopants is a proof that new energy states are forming. According to thermal analysis, the pure polymeric material is more likely to dehydrate than the NCs. This illustrates how water maintains the hydrogen bonds (H-bonds) that ensure the structural integrity of the resulting NCs. Moreover, the dielectric constant shows a decreasing trend as frequency rises. Therefore, modifications to the composition and crystallinity of polymeric NCs lead to significant advancements in opto-electrical behaviors.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Alumina, copper oxide, and erbium oxide nanoparticles improved the electrical conductivity, dielectric, and optical properties of poly (vinyl alcohol) for electrical applications

  • 期刊论文

  • 发表日期：

    2025年6月4日

查看全文
  • Norah Alwadai

摘要

The study inspected the thermal, optical, and dielectric activity of films made of pure PVA and PVA-based nanocomposites (NCs). The experimental findings demonstrate that variations in the dopants CuO, Er2O3, and Al2O3 have a significant impact on the optical and dielectric characteristics. For the PVA-based NCs, there was a significant change in the absorption edge toward higher energy. In PVA, the absorption edge reaches 3.85 eV and then changes to 5.45 eV in PVA–Al2O3 NC. It was found that the addition of Al2O3, Er2O3, and CuO dopants considerably widens the optical bandgap compared to pure PVA. Refractive index reduction with inserted dopants is a proof that new energy states are forming. According to thermal analysis, the pure polymeric material is more likely to dehydrate than the NCs. This illustrates how water maintains the hydrogen bonds (H-bonds) that ensure the structural integrity of the resulting NCs. Moreover, the dielectric constant shows a decreasing trend as frequency rises. Therefore, modifications to the composition and crystallinity of polymeric NCs lead to significant advancements in opto-electrical behaviors.