الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The current system demonstrated that the Chenopodium murale leaf extract can be used as a biosynthesize reducing/capping agent for the eco-friendly synthesis of silver and gold nanoparticles. We demonstrated that γ-irradiation-based strategy has remarkable advantages for preparing highly concentrated silver and gold NPs with narrow size distribution as confirmed by UV/Vis. spectra and TEM micrographs. UV/Vis. analysis showed that the absorbance of SPR peak change at different irradiation doses and its position was shifted at high-irradiation dose. TEM micrographs showed that the particle size range was decreased from 3-20 nm Ag NPs and particle size from 4-22 nm and Au NPs to 2-14 nm at 8 Mrad with average size 6 nm for biosynthesized by C. murale. Also, it is obvious that the aggregation of the particles was limited and the monodispersed was enhanced. Bragg reflections in XRD analysis and diffraction pattern of TEM confirmed the presence of face-centered cubic (FCC) each Ag NPs and Au NPs. The AC electrical measurement confirmed the enhancement of electrical conductivity for doped samples with increasing Au content. -radiations act as control size of silver and gold nanoparticles and monodispersion homogenies. DSC thermographs confirmed the miscibility of blend components (PVA/PVP) where it showed a single Tg. Also, it showed that the Tg, Tm and Td values moved toward higher temperatures after the addition of Ag NPs/Au NPs this is confirmed enhancement thermal stability. TGA curves moved towards higher temperatures with continuous increase nanoparticles content and TGA confirmed the DSC thermographs. XRD analysis revealed the decrease of degree of crystallinity of the PVA/PVP/(Ag NPs/Au NPs) complexes and appear pattern broad and strong diffraction peak at 2θ = 19.20o, this diffraction peak corresponds to (110) reflection crystallites. All previously mentioned results suggest that the first system will greatly help widen the application of γ-irradiation-based strategy for preparation of metal NPs with favorable properties and desired features while the second and third systems are found to be potential candidates for applications in solid state electrochemical cells and can be utilized in many applications, such as a self-regulated heaters, over-current protectors and temperature sensors and electrochemical catalysis.