Cerium (III) doping effects on optical and thermal properties of PVA films

Abdelaziz, M.

doi:10.1016/j.physb.2011.01.021

Cited by 133 publications

(56 citation statements)

References 26 publications

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“…ions, indicating a complete dissociation of the SmCl 3 within the polymeric matrix. Similar result was observed in our previous work [13]. Figure 2 shows FT-IR spectra of HPC and HPC/SmCl 3 films.…”

Section: Structural Characterizationsupporting

confidence: 89%

Effect of Sm3+ substitution on structural, optical and dielectric properties of hydroxypropyl cellulose films

Abdelaziz

2015

J Mater Sci: Mater Electron

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Complexes films composed of mixture of hydroxypropyl cellulose (HPC) and different concentrations of SmCl 3 were prepared by solvent casting technique. Different techniques were used to study the structural changes. The amorphousity of HPC increased with increasing Sm 3? concentration as indicated by XRD and FT-IR results. Optical absorption and fluorescence spectral analysis confirmed the presence of Sm 3? ions. Fluorescence spectra showed that the reddish-orange emission transition 4 G 5/2 ? 6 H 7/2 is more prominent. The nonlinear variation of the optical parameters with respect to Sm 3? content has been explained. The dielectric properties and ac-conductivity of these films were studied in the frequency range of 20 Hz-3 MHz at room temperature. The decrease in the dielectric constant e 0 was observed with the increase in frequency is due to dielectric dispersion. Both e 0 and dielectric loss e 00 are observed increases as Sm 3? ions concentration increased. The frequency and concentration dependence conductivity were also studied. The results showed that the conductivity increase with increasing both frequency and Sm 3? content. Real part electric modulus M 0 was lower at lower frequency but increases as frequency increased. Enhancement of both optical and electrical properties is observed which candidates the prepared films for many applications.

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Section: Structural Characterizationsupporting

confidence: 89%

Effect of Sm3+ substitution on structural, optical and dielectric properties of hydroxypropyl cellulose films

Abdelaziz

2015

J Mater Sci: Mater Electron

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“…Moreover, PVA is also nontoxic, high dielectric strength, and good charge storage capacity [10]. Some studies reveal that the physical properties of the PVA can be controlled by doping for different applications [11][12][13]. Polyethylene oxide (PEO) is the most widely utilized interesting material as a result of it is high chemical and thermal stability [14].…”

Section: Introductionmentioning

confidence: 99%

Complexion Formation in PVA/PEO/CuCl<sub>2</sub> Solid Polymer Electrolyte

Abdullah¹,

Saber²,

Hamasalih³

2015

ujms

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Solid polymer electrolyte films based on polymer blends of poly(vinyl alcohol) (PVA) and poly(ethylene oxide) (PEO), with different concentration of copper (II) chloride (CuCl 2 ) were prepared using casting technique. Optical studies were performed using Fourier transform infrared (FT-IR) and Ultraviolet-visible (UV-Vis) spectroscopy. The optical properties of these films were varied by varying CuCl 2 concentration. The results show the absorption edge for electrolyte samples shifts toward a lower energy region by increasing the salt concentration, leading to the band gap reduction. The band gap energy data showed that the incorporation of CuCl 2 into the polymeric system causes charge transfer complexes in the blend polymer, which lead to increase in the electrical conductivity, by providing additional charges in the lattice. The PVA/PEO/CuCl 2 solid polymer electrolyte films exhibit good UV shielding properties in the wavelength range from 190 to 400 nm.

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“…The values of Reχ (3) and Imχ (3) decreases with increasing the concentration of Ag nanoparticles in PVA, films because the linear refractive index of the dielectric medium has been declined after adding Ag nanoparticles in PVA polymer and it decreases with increasing concentration of Ag nanoparticles in PVA matrix. This property is inherent in all conductors and due to localized fluctuation of charged particles in medium [23]. Thus the absolute value of the third order nonlinear optical susceptibility was calculated as (7) The values of the third order nonlinear susceptibility obtained for the present samples are completely listed in table.…”

Section: Methodsmentioning

confidence: 99%

Nonlinear optical characterization of the Ag nanoparticles doped in polyvinyl alcohol films

Ghanipour

Dorranian

2015

Opt. Spectrosc.

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The effect of silver nanoparticles doped in polyvinyl alcohol (PVA) on the nonlinear optical properties of composite films is studied experimentally. Samples are PVA films of 0.14 mm thickness doped with different concentrations of silver nanoparticles. Nonlinear optical properties of doped polymer films are studied experimentally employing Z-scan techniques. Experiments are performed using the second harmonic of a continuous Nd-Yag laser beam at 532 nm wavelength and 45 mW power. The effect of nonlinear refractive index of samples is obtained by measuring the profile of propagated beam through the samples and their nonlinear refractive index is found to be negative. The nonlinear absorption coefficient is calculated using open aperture Z-scan data while its nonlinear refractive index is measured using the closed aperture Z-scan data, leads to measuring the third order susceptibility |χ (3) |. Real and imaginary parts of the third-order nonlinear optical susceptibility |χ (3) | are decrease with increasing the concentration of Ag nanoparticles in the films. The values of thermo-optic coefficient are determined at different concentrations of silver nanoparticles for samples.

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Cerium (III) doping effects on optical and thermal properties of PVA films

Cited by 133 publications

References 26 publications

Effect of Sm3+ substitution on structural, optical and dielectric properties of hydroxypropyl cellulose films

Effect of Sm3+ substitution on structural, optical and dielectric properties of hydroxypropyl cellulose films

Complexion Formation in PVA/PEO/CuCl<sub>2</sub> Solid Polymer Electrolyte

Nonlinear optical characterization of the Ag nanoparticles doped in polyvinyl alcohol films

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