Scholarlink

<p>This work investigates the dielectric behavior of polyvinyl alcohol (PVA)-based nanocomposites incorporating FeGaInS<sub>4</sub> crystals and varying amounts of graphene oxide (GO). The prepared samples include neat PVA, PVA with 2 wt.% FeGaInS<sub>4</sub>, and composites containing 1–3 wt.% GO in addition to 2 wt.% FeGaInS<sub>4</sub>. Measurements were conducted across a temperature range of 293–373&#xa0;K and frequencies from 120&#xa0;Hz to 1&#xa0;MHz. Results showed that dielectric permittivity rose with increasing temperature and decreased with frequency. The dielectric loss (tan δ) was found to decline with higher GO content, while it generally increased with temperature—exhibiting a peak for the 3 wt.% GO sample between 333 and 373&#xa0;K, attributed to relaxation phenomena. Electrical conduction characteristics, analyzed using the Correlated Barrier Hopping (CBH) model at 5&#xa0;kHz, revealed that GO strongly influences conductivity, charge carrier density, and activation energy. A reduction in activation energy upon GO incorporation indicates improved charge transport. Overall, these findings suggest that tuning the GO content provides an effective strategy to modify dielectric and conduction properties, highlighting the potential of these nanocomposites in electronic device applications.</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

Dielectric spectroscopy of PVA/GO/FeGaInS4 hybrid films: thermal and compositional effects

  • 期刊论文

  • 发表日期：

    2025年10月31日

查看全文
  • Zeynab Addayeva,
  • Mustafa Muradov,
  • Namiq Niftiyev,
  • Faiq Mammedov,
  • Goncha Eyvazova,
  • Bilge Coşkuner Filiz

摘要

This work investigates the dielectric behavior of polyvinyl alcohol (PVA)-based nanocomposites incorporating FeGaInS4 crystals and varying amounts of graphene oxide (GO). The prepared samples include neat PVA, PVA with 2 wt.% FeGaInS4, and composites containing 1–3 wt.% GO in addition to 2 wt.% FeGaInS4. Measurements were conducted across a temperature range of 293–373 K and frequencies from 120 Hz to 1 MHz. Results showed that dielectric permittivity rose with increasing temperature and decreased with frequency. The dielectric loss (tan δ) was found to decline with higher GO content, while it generally increased with temperature—exhibiting a peak for the 3 wt.% GO sample between 333 and 373 K, attributed to relaxation phenomena. Electrical conduction characteristics, analyzed using the Correlated Barrier Hopping (CBH) model at 5 kHz, revealed that GO strongly influences conductivity, charge carrier density, and activation energy. A reduction in activation energy upon GO incorporation indicates improved charge transport. Overall, these findings suggest that tuning the GO content provides an effective strategy to modify dielectric and conduction properties, highlighting the potential of these nanocomposites in electronic device applications.