##tical Properties Of The Polymer And Inorganic Nannocomposites
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For centuries, the polymer/inorganic nanocomposite is one of the most important class of functional materials due to its useful optical properties (including light absorption (UV and visible), photoluminescence, and refractive index) and its applications. The size and spatial distribution of inorganic particles in the polymer matrix are the two strongest parameters that the optical properties of these PINC composites depend on them. polymer/inorganic nanocomposites that consist of polymer and inorganic UV-absorbers have been interested application in many fields [318,319]. For example, Fig. 25 shows that at the swift heavy ions (SHI) irradiation fluence of 1x1011 ions/cm2 the PVA-Ag nanocomposites have a pronounced UV-blocking effect.…show more content… 3 UV-Vis absorption spectra of silver nano-particles prepared in PVA with various amounts of reducing agent. FIG. 4 TEM images and size distributions of silver nanoparticles in PVA; a) for sample with 2 ml, b) 5 ml, and c) 15 ml reducing agent. FIG. 8 Nonlinear refractive index as a function of particle size of silver/PVA nanocomposites. [N. Faraji, W. Mahmood Mat Yunus, A. Kharazmi, E. Saion, M. Shahmiri, N. Tamchek, J. Europ. Opt. Soc. Rap. Public. 7, 12040 (2012))]
Sadjadi et al.[ ] reported the broad absorption band at λmax = 458 nm. This characteristic peak is due to the (SPR) oscillation of conduction band electrons of Ag.
AL-Thabaiti et al.[ ], reported the PVA/Ag (nacre-like) nanocomposite films were built during the reduction of Ag+ ions in to Ag0 by tyrosine. Also, investigated the surface plasmon resonance band at 425 to 475 nm due to the formation of Ag nanoparticles. On the other, recorded a broad SRP absorption band centered at 450 nm in presence of shape-directing CTAB. Then, studied the effect of both the PVA and CTAB on the formation of the Ag nanopaerticles and they found the PVA, is better capping and protecting agent than CTAB, is very effective to inhibit the agglomeration of particles. Also, they found that there is no effect on the position and nature of the surface plasmon resonance band with the increasing concentrations of the PVA. Badr et al. [ ], studied the effect of Ag concentration (1.14, 2.1, 3.2, 3.6, 4.2, 4.8, and 5.4