Irradiation of silver and agar/silver nanoparticles with argon, oxygen glow discharge plasma, and mercury lamp.
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The irradiation effect of argon, oxygen glow discharge plasma, and mercury lamp on silver and agar/silver nanoparticle samples is studied.The irradiation time dependence of the synthesized silver and agar/silver nanoparticle absorption spectra and their antibacterial effect are studied and compared.The SEM results for both samples showed nanoparticle formation with mean size about 50 nm and 40 nm respectively.
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PubMed Central - PubMed
Affiliation: Physics Department, Faculty of science, Al-Azhar University-Assuit branch, Assuit, Egypt.
ABSTRACT
The irradiation effect of argon, oxygen glow discharge plasma, and mercury lamp on silver and agar/silver nanoparticle samples is studied. The irradiation time dependence of the synthesized silver and agar/silver nanoparticle absorption spectra and their antibacterial effect are studied and compared. In the agar/silver nanoparticle sample, as the irradiation time of argon glow discharge plasma or mercury lamp increases, the peak intensity and the full width at half maximum, FWHM, of the surface plasmon resonance absorption band is increased, however a decrease of the peak intensity with oxygen glow plasma has been observed. In the silver nanoparticle sample, as the irradiation time of argon, oxygen glow discharge plasma or mercury lamp increases, the peak intensity of the surface plasmon resonance absorption band is increased, however, there is no significant change in the FWHM of the surface plasmon resonance absorption band. The SEM results for both samples showed nanoparticle formation with mean size about 50 nm and 40 nm respectively. Throughout the irradiation time with the argon, oxygen glow discharge plasma or mercury lamp, the antibacterial activity of several kinds of Gram-positive and Gram-negative bacteria has been examined. No MeSH data available. Related in: MedlinePlus |
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Fig3: SEM image and particle size histogram of agar/silver nanoparticles. Mentions: SEM analysis has been performed in order to observe morphology of the synthesized samples. Figures 2 and 3 show SEM images and the corresponding size distributions of silver and agar/silver nanoparticle samples respectively. From SEM images the silver and agar/silver nanoparticles are spherically shaped with mean size about 50 nm and 40 nm respectively. The effect of agar powder on the synthesized silver nanoparticles states as controller of nucleation as well as stabilizer.Figure 2 |
View Article: PubMed Central - PubMed
Affiliation: Physics Department, Faculty of science, Al-Azhar University-Assuit branch, Assuit, Egypt.
No MeSH data available.