Scholarlink

<p>We synthesized copper oxide nanoparticles with tunable phase composition using a one-step underwater direct current plasma discharge between two copper electrodes. By varying the discharge current from 0.25&#xa0;A to 0.8&#xa0;A, we obtained three distinct phase mixtures: a combination of CuCO<sub>3</sub>, Cu<sub>2</sub>O, and a small amount of CuO at 0.25&#xa0;A; predominantly CuO with Cu<sub>2</sub>O at 0.5&#xa0;A; and mainly CuO with minor Cu<sub>2</sub>O and Cu<sub>2</sub>O<sub>3</sub> at 0.8&#xa0;A. Simultaneously, the nanoparticles were deposited directly onto sterile viscose wound patches, yielding functional composite materials in a single step. Magnetic measurements revealed weak ferromagnetic behavior for all samples, with saturation magnetization decreasing from 2.94 to 2.15 emu/g as the current increased. The antibacterial activity of the functionalized patches was tested against <i>Escherichia coli</i> M-17 and <i>Staphylococcus aureus</i> 6538-P. The Sample 1 (0.25&#xa0;A) showed strong activity against both bacterial strains (inhibition zones of 14.2&#xa0;mm and 12.8&#xa0;mm, respectively), while the Sample 3 (0.8&#xa0;A) was active only against <i>E. coli</i> (11.5&#xa0;mm) and showed weak efficacy against <i>S. aureus</i> (3.5&#xa0;mm). The Sample 2 (0.5&#xa0;A) exhibited no antibacterial effect. These findings demonstrate for the first time that the phase composition of plasma-synthesized copper oxides determines both their magnetic and antibacterial properties. The one-step process offers a simple, reagent-free route to functionalize wound dressings with tunable properties, opening new possibilities for magnetically controlled antimicrobial patches.</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

Phase-dependent magnetic and antibacterial properties of copper oxide nanoparticles synthesized by underwater plasma discharge for viscose patch functionalization

  • 期刊论文

  • 发表日期：

    2026年6月30日

查看全文
  • Alexander Klimas,
  • Nikolay Sirotkin,
  • Oleg Kuznetsov,
  • Alexandr Agafonov,
  • Michail Shipko,
  • Michail Stepovich,
  • Elena Savchenko,
  • Anna Khlyustova

摘要

We synthesized copper oxide nanoparticles with tunable phase composition using a one-step underwater direct current plasma discharge between two copper electrodes. By varying the discharge current from 0.25 A to 0.8 A, we obtained three distinct phase mixtures: a combination of CuCO3, Cu2O, and a small amount of CuO at 0.25 A; predominantly CuO with Cu2O at 0.5 A; and mainly CuO with minor Cu2O and Cu2O3 at 0.8 A. Simultaneously, the nanoparticles were deposited directly onto sterile viscose wound patches, yielding functional composite materials in a single step. Magnetic measurements revealed weak ferromagnetic behavior for all samples, with saturation magnetization decreasing from 2.94 to 2.15 emu/g as the current increased. The antibacterial activity of the functionalized patches was tested against Escherichia coli M-17 and Staphylococcus aureus 6538-P. The Sample 1 (0.25 A) showed strong activity against both bacterial strains (inhibition zones of 14.2 mm and 12.8 mm, respectively), while the Sample 3 (0.8 A) was active only against E. coli (11.5 mm) and showed weak efficacy against S. aureus (3.5 mm). The Sample 2 (0.5 A) exhibited no antibacterial effect. These findings demonstrate for the first time that the phase composition of plasma-synthesized copper oxides determines both their magnetic and antibacterial properties. The one-step process offers a simple, reagent-free route to functionalize wound dressings with tunable properties, opening new possibilities for magnetically controlled antimicrobial patches.