Optical properties of solution grown PVDF-ZnO nanocomposite thin films

Indolia, Ajay Pal; Gaur, M. S.

doi:10.1007/s10965-012-0043-y

Cited by 125 publications

(45 citation statements)

References 25 publications

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“…Polymers or blends having nano-sized fillers exhibits markedly improved mechanical, thermal, and optical properties when compared to pure polymers or their traditional composites. Also, improving the electrical and magnetic properties of the polymeric materials is the subject that attracts many investigators [5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and investigation of the electrical and dielectric properties of Co3O4/(CMC+PVA) nanocomposite films

Sayed

El‐Gamal

2015

J Polym Res

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Cobalt oxide (Co 3 O 4 ) nanoparticles (NPs), with average crystallite size<61 nm, were prepared by a sol-gel method. Two allowed direct optical band gaps of 1.445 and 1.915 eV are found for Co 3 O 4 NPs. Sodium carboxymethyl cellulose (Na-CMC)/polyvinyl alcohol (PVA) blend was doped with Co 3 O 4 at different concentrations<1.0 wt.% to study the electrical and dielectric properties of these nanocomposite films. Scanning electron microscopy images revealed a good dispersion of Co 3 O 4 NPs on the surface of the CMC/PVA films. The current-voltage characteristics are of non-ohmic behavior. The dielectric permittivity (ε') was studied in the frequency and temperature range of 5.0 kHz-5.0 MHz and 308-408 K and was found to depend on the Co 3 O 4 content. The dielectric loss (ε^) also increases and shows wave-like behavior with increasing Co 3 O 4 ratio. Increasing Co 3 O 4 NPs content leads to the formation of more number of three-dimensional semiconducting connected networks inside CMC/PVA matrix, leading to increasing both DC and AC conductivities. The correlated barrier hopping (CBH) is the most suitable mechanism to explain the AC conduction behavior in the Co 3 O 4 / Na-CMC/ PVA nanocomposite films.

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Section: Introductionmentioning

confidence: 99%

Synthesis and investigation of the electrical and dielectric properties of Co3O4/(CMC+PVA) nanocomposite films

Sayed

El‐Gamal

2015

J Polym Res

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“…The peak of the high absorption at approximately 375 nm was observed. The peak absorption of ZnO nanoparticles corresponded to the result obtained by Indolia and Gaur [2]. In addition, the lower absorption in the UV and visible regions were due to the roughness of the surfaces that increased with increasing ZnO concentrations, which caused scattering and then loss of incident intensity [8].…”

Section: Methodsmentioning

confidence: 53%

“…It shows five crystalline phases, namely α, β, γ, δ, and ε [1]. The properties of PVDF offer a wide range of scientific and technological applications such as optical switches, optical waveguides, light-emitting diodes, lenses, and nonlinear optical devices [2]. Besides that, the nonlinear quality of PVDF can be significantly improved by hosting nanoparticles of high nonlinear optical susceptibility [3].…”

Section: Introductionmentioning

confidence: 99%

“…ZnO is considered a nonlinear optical nanomaterial [2]; therefore, using its nanoparticles as the filler in PVDF can enhance the nonlinear optical properties of the polymer. Our previous report [5] revealed that adding inorganic nanoparticles such as ZnO into organic polymer such as PVDF can enhance the optical properties of the polymer due to interfacial interactions between them.…”

Section: Introductionmentioning

confidence: 99%

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Measurements of Nonlinear Optical Properties of PVDF/ZnO Using Z-Scan Technique

et al. 2015

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The nonlinear optical properties of ZnO nanoparticles dispersed in poly (vinylidene fluoride) (PVDF) polymer are investigated. PVDF/ZnO nanocomposites were prepared by mixing different concentrations of ZnO nanoparticles, as the filler, with PVDF, as the polymer matrix, using casting method. Acetone was used as a solvent for the polymer. FTIR spectra of the samples were analyzed thus confirming the formation of α and β phases. The absorbance spectra of the samples were obtained, thereby showing high absorption in the UV region. The linear absorption coefficient was calculated. The single-beam Z-scan technique was used to measure the nonlinear refractive index and the nonlinear absorption coefficient of the PVDF/ZnO nanocomposite samples. We observed that the nonlinear refractive index is in the order of 10 −13 cm 2 /W with the negative sign, whereas the nonlinear absorption coefficient is in the order of 10 −8 cm/W.

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“…In this frame, the most common application is the use of ZnO for creating excellent UV-shielding materials. Hybrid materials were synthesized by embedding or creating in situ, by sol-gel technique, ZnO nanoparticles in different transparent polymeric resins such as PS [191], PMMA [192], PVDF [193], EVA [194], PLA [195], UV-curable resins [196], and copolymers [197,198]. ZnO nanocomposites also exhibit resistance against ionizing radiations, thus opening application possibilities in this field [199].…”

Section: Optical Applicationsmentioning

confidence: 99%