Synthesis and Characterization of Double Core-shell Au@Ag@Au Nanoparticles by Pulsed Laser Ablation in Liquid and Analysis of Their Antibacterial Properties

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL Plasmonics Pub Date : 2024-07-31 DOI:10.1007/s11468-024-02450-x
Ahmed A. Aktafa, Uday M. Nayef, Majid S. Jabir
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Abstract

Our research involved the synthesis of a double core-shell structure using gold and silver NPs. The core material used was gold. The initial shell had a silver coating, while the subsequent shell was encased in gold. The wavelength of the laser was 1046 nm and was employed, along with 250 pulses at a frequency of 1 Hz, delivering an energy of 500 mJ into 5 ml of deionized water; the focal length of the lens was 12 cm. A comparison was made between the double core-shell construction consisting of individual silver (Ag) and gold (Au) nanoparticles and the single core-shell structure. Various tests were conducted on the samples, including XRD, TEM, UV-visible, FTIR, and zeta potential, to analyze their characteristics. Additionally, the energy gap was determined for each sample. Next, the study examined the impact of particles with a double core-shell and single particles on S. aureus and E. coli bacteria. The findings revealed that a double coating exhibited exceptional effectiveness in eliminating bacterial cells when compared to single particles and a single core-shell. This was demonstrated through the implementation of a zone of inhibition and antibiofilm activity. They were able to verify the existence of the two metal substances (Au and Ag) in each and every sample by using X-ray diffraction (XRD). TEM images clearly depict the formation of the core-shell system. Also presented were TEM images of colloidal particles made of gold and silver, which were smaller than 10 nm in size. The formation of certain nanoparticles resulted in a shift in the peak wavelength, confirming the occurrence of a superficial overlap. The energy transition was calculated using the Tauc relation, with specific values for the different nanoparticles involved. Based on the zeta potential, it is observed that the stability of Ag NPs is greater than that of Au NPs. Additionally, the core double-shell structure formed is found to be less stable compared to the individual Au NPs and Ag NPs. During the ICP-MS analysis, it was observed that the amount of the double shells reduced in comparison to both the individual shell and the individual gold and silver particles. The particles were linked to each other to produce the shells. The current study suggested the potential role of Au@Ag@Au NPs for antibacterial applications in the future.

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利用脉冲激光烧蚀液态双核壳 Au@Ag@Au 纳米粒子的合成与表征及其抗菌特性分析
我们的研究涉及使用金和银 NPs 合成双核壳结构。使用的核心材料是金。最初的外壳有一层银涂层,而随后的外壳则由金包裹。激光波长为 1046 nm,使用频率为 1 Hz 的 250 个脉冲,将 500 mJ 的能量注入 5 ml 去离子水中;透镜焦距为 12 cm。对由单个银(Ag)和金(Au)纳米粒子组成的双核壳结构和单核壳结构进行了比较。对样品进行了各种测试,包括 XRD、TEM、UV-visible、FTIR 和 zeta 电位,以分析其特性。此外,还测定了每个样品的能隙。接下来,研究还考察了双核壳颗粒和单颗粒对金黄色葡萄球菌和大肠杆菌的影响。研究结果表明,与单颗粒和单核壳相比,双涂层在消除细菌细胞方面表现出卓越的功效。抑制区和抗生物膜活性的实施证明了这一点。他们利用 X 射线衍射 (XRD) 验证了每个样品中都存在两种金属物质(金和银)。TEM 图像清楚地描述了核壳系统的形成。此外,还展示了尺寸小于 10 纳米的金银胶体颗粒的 TEM 图像。某些纳米粒子的形成导致了峰值波长的移动,证实了表面重叠的发生。能量转换是通过陶克关系计算得出的,不同的纳米粒子有不同的数值。根据 zeta 电位观察到,Ag NPs 的稳定性高于 Au NPs。此外,与单个 Au NPs 和 Ag NPs 相比,形成的核心双壳结构稳定性较差。在 ICP-MS 分析过程中观察到,与单个外壳和单个金银粒子相比,双壳的数量减少了。颗粒之间相互连接,从而产生了外壳。目前的研究表明,Au@Ag@Au NPs 在未来的抗菌应用中具有潜在的作用。
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来源期刊
Plasmonics
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.
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