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<p>This study investigates the synthesis of gold nanoparticle (Au NP)–doped carbon nanofibers (CNFs) via laser ablation, followed by dispersion in dimethylformamide (DMF), with controlled doping achieved by varying the number of laser pulses. Structural and morphological characterizations were conducted using field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and X-ray diffraction (XRD), while optical properties were analyzed through spectroscopic techniques. Zeta potential measurements confirmed predominantly negative surface charges for CNF, CNF-500, CNF-1000, and CNF-1500, attributed to citrate ion stabilization. The incorporation of Au NPs significantly enhanced key performance metrics, with sensitivity increasing from 7.5 to 19.2%, recovery time extending from 17.82 to 44.37&#xa0;s, and response time rising from 9.18 to 17.01&#xa0;s at 200&#xa0;°C and 1500 pulses. Furthermore, antibacterial evaluations against multidrug-resistant <i>Staphylococcus aureus</i> and <i>Escherichia coli</i> demonstrated the potential of the synthesized nanomaterials as effective antimicrobial agents. These findings suggest that Au NP–doped CNFs offer a promising avenue for biomedical applications, particularly in antibacterial therapies and sensor technologies.</p>

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Eco-friendly Laser Ablation for Synthesis of CNF@Au Nanoparticles: Insights into Enhancing NO2 Gas Detection and Antibacterial Activity

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Taha M. Rashid,
  • Muntadher I. Rahmah,
  • Waleed K. Mahmood,
  • Mohanad Q. Fahem,
  • Majid S. Jabir,
  • Ali Kadhum Bidan,
  • Sarmad Adbalrazaq,
  • Mohammed H. Jawad,
  • Doaa M. Awaid,
  • Marwah A. Qamandar,
  • Sama M. Alsaffar

摘要

This study investigates the synthesis of gold nanoparticle (Au NP)–doped carbon nanofibers (CNFs) via laser ablation, followed by dispersion in dimethylformamide (DMF), with controlled doping achieved by varying the number of laser pulses. Structural and morphological characterizations were conducted using field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and X-ray diffraction (XRD), while optical properties were analyzed through spectroscopic techniques. Zeta potential measurements confirmed predominantly negative surface charges for CNF, CNF-500, CNF-1000, and CNF-1500, attributed to citrate ion stabilization. The incorporation of Au NPs significantly enhanced key performance metrics, with sensitivity increasing from 7.5 to 19.2%, recovery time extending from 17.82 to 44.37 s, and response time rising from 9.18 to 17.01 s at 200 °C and 1500 pulses. Furthermore, antibacterial evaluations against multidrug-resistant Staphylococcus aureus and Escherichia coli demonstrated the potential of the synthesized nanomaterials as effective antimicrobial agents. These findings suggest that Au NP–doped CNFs offer a promising avenue for biomedical applications, particularly in antibacterial therapies and sensor technologies.