Scholarlink

<p>Silver nanoparticles (AgNPs) were successfully synthesized using an atmospheric pressure plasma jet operated under different argon flow rates (0.5,&#xa0;1.5 and 2.5 L/min). The gas flow effect on structural, morphological, optical, and chemical characteristics of AgNPs was systematically investigated. UV–Vis spectroscopy revealed a&#xa0;progressive blue shift of the surface plasmon resonance peak from ~450 nm at a&#xa0;low flow to ~420 nm at a&#xa0;high flow, accompanied by a&#xa0;narrowing of the FWHM, indicating to the particle size reduction and improved dispersion. X‑ray diffraction patterns confirmed the formation of face-centered cubic Ag with the decreasing crystallite size with the increasing flow, as calculated from the Scherrer equation. SEM images demonstrated that higher flow rates produced smaller and more uniform spherical nanoparticles, whereas the lower flow resulted in agglomerated clusters. The FTIR analysis identified hydroxyl, nitrate, and organic groups associated with the nanoparticle surface with diminished intensities at higher flows, reflecting an improved reduction and stabilization of metallic Ag. Collectively, these findings establish argon flow rate as a&#xa0;decisive parameter for tailoring the nanoparticle size, crystallinity, and surface chemistry, highlighting plasma jet synthesis as a&#xa0;green and efficient route for producing high-quality AgNPs.</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

Plasma jet–mediated synthesis of silver nanoparticles in aqueous medium: Structural and optical properties

  • 期刊论文

  • 发表日期：

    2026年6月2日

查看全文
  • Kadhim A. Aadim,
  • Maryam G. Jasim,
  • Ali Sh. Maktoof

摘要

Silver nanoparticles (AgNPs) were successfully synthesized using an atmospheric pressure plasma jet operated under different argon flow rates (0.5, 1.5 and 2.5 L/min). The gas flow effect on structural, morphological, optical, and chemical characteristics of AgNPs was systematically investigated. UV–Vis spectroscopy revealed a progressive blue shift of the surface plasmon resonance peak from ~450 nm at a low flow to ~420 nm at a high flow, accompanied by a narrowing of the FWHM, indicating to the particle size reduction and improved dispersion. X‑ray diffraction patterns confirmed the formation of face-centered cubic Ag with the decreasing crystallite size with the increasing flow, as calculated from the Scherrer equation. SEM images demonstrated that higher flow rates produced smaller and more uniform spherical nanoparticles, whereas the lower flow resulted in agglomerated clusters. The FTIR analysis identified hydroxyl, nitrate, and organic groups associated with the nanoparticle surface with diminished intensities at higher flows, reflecting an improved reduction and stabilization of metallic Ag. Collectively, these findings establish argon flow rate as a decisive parameter for tailoring the nanoparticle size, crystallinity, and surface chemistry, highlighting plasma jet synthesis as a green and efficient route for producing high-quality AgNPs.