Scholarlink

<p>This study examined the effects of Mn and Ni co-doping on the structural, optical, dielectric, and magnetic properties of ZnO nanoparticles synthesized via the co-precipitation method. X-ray diffraction (XRD) analysis confirmed a hexagonal wurtzite crystalline structure, with particle sizes ranging from 26 to 48&#xa0;nm, as corroborated by scanning electron microscopy (SEM) and Scherrer formula calculations. Energy-dispersive X-ray spectroscopy (EDS) revealed the elemental composition, while FTIR spectra indicated ZnO stretching, signifying the presence of the wurtzite phase. UV-Vis spectroscopy demonstrated a reduction in the band gap (2.96&#xa0;eV) with increased doping concentrations, resulting in a red shift in absorption. The dielectric properties exhibited frequency dependence, with both real and imaginary components decreasing with increased frequency and doping. Ferromagnetism was observed in the doped samples, attributed to the formation of magnetic polarons due to oxygen vacancies. The findings suggest that co-doping with Ni and Mn effectively alters the characteristics of ZnO nanoparticles, thereby supporting their potential application in spintronics and high-frequency devices.</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

Tuning the band gap and metallic phase via Ni/Mn co-doping of Zn0.8Ni0.20-xMnxO nanoparticles

  • 期刊论文

  • 发表日期：

    2025年11月20日

查看全文
  • Syed Faizan Murshid,
  • Syed Awais Ahmad,
  • Aqsa Zubair,
  • Weibin Zhang,
  • Muhammad Yar Khan,
  • Liaqat Ali

摘要

This study examined the effects of Mn and Ni co-doping on the structural, optical, dielectric, and magnetic properties of ZnO nanoparticles synthesized via the co-precipitation method. X-ray diffraction (XRD) analysis confirmed a hexagonal wurtzite crystalline structure, with particle sizes ranging from 26 to 48 nm, as corroborated by scanning electron microscopy (SEM) and Scherrer formula calculations. Energy-dispersive X-ray spectroscopy (EDS) revealed the elemental composition, while FTIR spectra indicated ZnO stretching, signifying the presence of the wurtzite phase. UV-Vis spectroscopy demonstrated a reduction in the band gap (2.96 eV) with increased doping concentrations, resulting in a red shift in absorption. The dielectric properties exhibited frequency dependence, with both real and imaginary components decreasing with increased frequency and doping. Ferromagnetism was observed in the doped samples, attributed to the formation of magnetic polarons due to oxygen vacancies. The findings suggest that co-doping with Ni and Mn effectively alters the characteristics of ZnO nanoparticles, thereby supporting their potential application in spintronics and high-frequency devices.