An Eco-Friendly Pulsed Laser Synthesis of Gold Nanoparticles as Sustainable Antibacterial Agents for Contaminated Water

IF 5.6 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2026-08-04 DOI:10.1007/s11468-026-03382-4

Arkan Kareem Buraihi, Zainab J. Shanan, Nisreen Kh. Abdalameer

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Abstract

This study aimed to evaluate the antibacterial activity of PLAL-synthesized gold nanoparticles (AuNPs) against environmentally isolated waterborne pathogens. AuNPs were successfully synthesized via a green pulsed laser ablation in liquid (PLAL) technique, offering a clean and chemical-free route for nanomaterial production. Structural and morphological analyses confirmed the formation of crystalline, well-dispersed AuNPs with an average size of ~ 47 nm, while zeta potential measurements (− 39 mV) demonstrated excellent colloidal stability. The antibacterial performance of AuNPs was evaluated against Staphylococcus aureus, Pseudomonas aeruginosa, and Acinetobacter baumannii, revealing a clear concentration-dependent response. The inhibition zone increased from ~ 6 mm (control) to ~ 18 mm at the highest concentration, with S. aureus exhibiting the highest susceptibility. The superior antibacterial activity is attributed to the synergistic effects of nanoscale size, high surface reactivity, and strong dispersion stability, which enhance nanoparticle–cell interactions and induce cellular damage. The inhibition zone increased from 6.04 ± 0.10 mm in the control group to 18.10 ± 0.46 mm at the highest AuNP concentration of 3.1 mg/L, demonstrating strong concentration-dependent antibacterial activity.

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生态友好型脉冲激光合成金纳米颗粒作为污水的可持续抗菌剂

本研究旨在评价plal合成的金纳米颗粒（AuNPs）对环境分离的水传病原体的抗菌活性。通过绿色脉冲激光烧蚀（PLAL）技术成功合成了AuNPs，为纳米材料的生产提供了一条清洁、无化学物质的途径。结构和形态分析证实形成了晶体状、分散良好的AuNPs，平均尺寸为~ 47 nm，而zeta电位测量（−39 mV）显示出优异的胶体稳定性。对AuNPs对金黄色葡萄球菌、铜绿假单胞菌和鲍曼不动杆菌的抑菌性能进行了评价，发现其具有明显的浓度依赖性。在最高浓度下，金黄色葡萄球菌的抑制带由对照的~ 6 mm增加到~ 18 mm，对金黄色葡萄球菌的敏感性最高。其优异的抗菌活性是由于纳米级尺寸、高表面反应性和强分散稳定性的协同作用，增强了纳米颗粒与细胞的相互作用，诱导细胞损伤。当AuNP浓度为3.1 mg/L时，抑菌带由对照组的6.04±0.10 mm增加到18.10±0.46 mm，表现出较强的浓度依赖性。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.