الرئيسية / الفعاليات العلمية / تحضير والتوصيف البصري للمتراكب النانوي PVA: Ag

تحضير والتوصيف البصري للمتراكب النانوي PVA: Ag

Asmahan A. Muhmood1*, Inass A.Zgair2

, Mushtaq A. Hussein3

, Liwaa H.

Mahdi4
, Bashaer S.Jabbar5

,Adel H. Omran Alkhayatt6
1, 2, 6 Kufa University, Faculty of science, Physics Department, Iraq
3Ministry of education, physics of material, physics, Iraq
4Kufa University, Faculty of Medicine, Pathology and Forensic Department, Iraq
5Kufa University, Faculty of science, biology department, Iraq
E-mail: asmahan.alnaseefi@uokufa.edu.iq
Abstract. In this paper, a 3% of polyvinyl alcohol PVA polymer solution was prepared with
distilled water. PVA:Ag Nanocomposites were prepared by adding different concentrations of
silver (Ag) nanoparticles (3, 6 and 9) %. Pure as well as PVA:Ag nanocomposites films were
prepared by drop casting method. The optical properties of PVA: Ag nanocomposite were
studied using the absorption and transmittance spectrum measured at wavelength range (200-
1000) nm. The optical parameters of the prepared PVA: Ag nanocomposite, such as absorption
coefficient, refractive index, and extinction coefficient, as well as the real and imaginary part of
the refractive index were calculated as a function of Ag NPs concentration. The results show that
the absorption edge is red shifted towards long wavelengths after adding the silver nanoparticles
as well as an increment in the optical parameters after adding the Ag nanoparticles. The energy
gap was also calculated for all the prepared samples, which were decreased from 4 eV to 1.72
eV with the increase addition of Ag nanoparticles content (3 to 9) %.
Keywords: PVA polymer, nanocomposite, nanoparticles, optical properties

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