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Irradiation of silver and agar/silver nanoparticles with argon, oxygen glow discharge plasma, and mercury lamp.

Ahmad MM, Abdel-Wahab EA, El-Maaref AA, Rawway M, Shaaban ER - Springerplus (2014)

Bottom Line: 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.

View Article: 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

UV–vis absorbance spectra of agar/silver nanoparticle sample before and after irradiation with oxygen plasma at different time periods.
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Fig9: UV–vis absorbance spectra of agar/silver nanoparticle sample before and after irradiation with oxygen plasma at different time periods.

Mentions: Figures 7, 8, and 9 show the absorption spectrum of agar/silver nanoparticle samples irradiated with argon, oxygen, and mercury lamp at different time intervals respectively. It is shown that for agar/silver nanoparticle sample as the irradiation time of argon glow discharge plasma or mercury lamp increases, the peak intensity and the FWHM of the SPR absorption band are increased. However a decrease of the peak intensity with oxygen glow discharge plasma is observed and the FWHM remains constant.Figure 7


Irradiation of silver and agar/silver nanoparticles with argon, oxygen glow discharge plasma, and mercury lamp.

Ahmad MM, Abdel-Wahab EA, El-Maaref AA, Rawway M, Shaaban ER - Springerplus (2014)

UV–vis absorbance spectra of agar/silver nanoparticle sample before and after irradiation with oxygen plasma at different time periods.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150921&req=5

Fig9: UV–vis absorbance spectra of agar/silver nanoparticle sample before and after irradiation with oxygen plasma at different time periods.
Mentions: Figures 7, 8, and 9 show the absorption spectrum of agar/silver nanoparticle samples irradiated with argon, oxygen, and mercury lamp at different time intervals respectively. It is shown that for agar/silver nanoparticle sample as the irradiation time of argon glow discharge plasma or mercury lamp increases, the peak intensity and the FWHM of the SPR absorption band are increased. However a decrease of the peak intensity with oxygen glow discharge plasma is observed and the FWHM remains constant.Figure 7

Bottom Line: 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.

View Article: 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