X射线光电子能谱
材料科学
纳米颗粒
二次离子质谱法
扫描电子显微镜
分析化学(期刊)
玻璃化转变
兴奋剂
表面等离子共振
吸收光谱法
光谱学
化学工程
化学
纳米技术
离子
复合材料
聚合物
有机化学
物理
光电子学
量子力学
工程类
作者
Promod Kumar,Mohan Chandra Mathpal,Soumya Ghosh,Gajendra Kumar Inwati,Jero Maze,Mart‐Mari Duvenhage,W. Roos,H.C. Swart
标识
DOI:10.1016/j.jallcom.2022.164789
摘要
The Au nanoparticles (NPs) were formed near the surfaces of pre-synthesized sodium zinc –borate glass by an ion exchange process obtained by thermal heat treatment in an open air environment at various temperatures. The pre-heated Au doped glass samples were extensively tested by the different techniques such as optical absorption spectroscopy, Scanning Electron Microscope (SEM), X-ray photoelectron spectroscopy (XPS), Time of Flight Secondary Ion Mass Spectroscopy (TOF-SIMS), and these Au NPs were used for the antimicrobial applications. SEM confirmed the spherical shaped Au NPs with increasing thermal treatment up to 550 °C. The optical absorption findings showed that the as –synthesized Au NPs showed Localized Surface Plasmon Resonance behaviour, giving clear evidence of an Au NPs band formed in the glass matrix. The formation mechanism of the Au doped glass samples was studied theoretically from a thermodynamic point of view during heat treatment. XPS and TOF-SIMS were used to study the chemical state and the thermal stability of the pre-heated Au NPs doped glasses in an ultra-high vacuum. The effect of concentration changes in the line-shape and in binding energy as a function of thermal heat treatment suggests that the Au NPs formed near the glass surfaces and changes in the chemical composition as well as chemical structures of the Au doped glass samples occurred. Antimicrobial activity such as antibacterial as well as antifungal activity of pre-heated Au doped glass samples was tested against different strains by the disk diffusion method. The Au doped glass samples exhibited enhanced antibacterial as well as antifungal activities by the influence of thermal treatment at different temperatures. Thus, the Au doped glass sample could be efficiently explored as a medical tool in pharmaceutical industries, biotechnology industries and chemical laboratories based upon its antibacterial findings.
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