Tailoring variations in the linear optical and radiation shielding parameters of PVA polymeric composite films doped with rare-earth elements

Mostafa, Mostafa; Zakaly, Hesham M.H.; Issa, Shams A.M.; Saudia, H. A.; Henaish, A. M. A.

doi:10.1007/s00339-022-05304-7

Cited by 27 publications

(1 citation statement)

References 69 publications

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“…The electrical and thermal behavior of polyvinyl pyrrolidone (PVP) have been controlled for semiconducting device applications [11]. The radiation shielding of polyvinyl alcohol (PVA) has been enhanced by using deuterium and europium elements [12]. The dielectric and optical properties of a PVA/CMC blends were tuned using Cd0.9Mg0.1S nanoparticles (NPs) by Heiba et al [13].…”

Section: Introductionmentioning

confidence: 99%

Role of Cu/ZnO Nanostructures Doping on the Optical Behavior of Polyvinyl Alcohol/Polyvinyl Pyrrolidone/Graphene Composites for Optoelectronic Applications

Althobaiti,

Badawi

2023

Journal of Macromolecular Science, Part B

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The linear/nonlinear optical and dielectric performance of PVA/PVP/graphene composites were enhanced by doping with Cu/ZnO (ZCO) nanoparticles (NPs) for optoelectronic applications. Bare and ZCO polymeric nanocomposites (PNCs) blends were fabricated by the casting method. The structure of the synthesized ZCO NPs and ZCO PNCs were studied by X-ray diffraction (XRD) and Fourier transform infra-red (FT-IR) spectroscopy techniques. The optical performance was characterized on the basis of UV-visible-NIR data. The XRD investigations revealed the wurtzite structure of the ZCO NPs with a crystallite size of 17.8 nm. The FT-IR investigations confirmed the integration of ZCO NPs with the host blend's structure. The optical analysis exposed that the direct and indirect band gap of the host blend decreased from 5.20 eV and 4.94 eV to 4.36 eV and 4.29 eV for 10 wt% of ZCO PNCs. The Urbach energy rose from 0.62 eV to 1.28 eV for 10 wt% of ZCO PNCs. The refractive index grew from 1.29 (bare blend) to 1.82 for 10 wt% of ZCO PNC at hν= 2.0 eV. In addition, a great enhancement in the nonlinear optical constants was achieved via ZCO doping. The third-order nonlinear susceptibility, χ (3) , increased from 1.30 x 10 -13 esu (bare) to 9.23 x 10 -11 esu for 10 wt% of ZCO PNC at hν = 5.0 eV. We suggest these valuable achievements in the optical behavior of PVA/PVP/graphene blend by ZCO doping nominate it for applications in optical devices improvement.

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Section: Introductionmentioning

confidence: 99%

Role of Cu/ZnO Nanostructures Doping on the Optical Behavior of Polyvinyl Alcohol/Polyvinyl Pyrrolidone/Graphene Composites for Optoelectronic Applications

Althobaiti,

Badawi

2023

Journal of Macromolecular Science, Part B

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Synthesis, characterization, and tailoring variations in the linear optical of erbium‐ions doped (PVA/PVP) polymeric composites for optical devices: Improvement of the dielectric characteristics

Mohammed

Yahia

El‐Mongy

2023

J of Applied Polymer Sci

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The simple solution casting method was utilized for preparing composite films (PVA-30 wt% PVP) incorporated with various content of erbium ions (Er 3+ ) (0.11, 0.37, 1.85, 3.7, 9.25, and 18.5) wt%. The composite films' properties were investigated using XRD, UV-Vis, and dielectric spectrometers. The XRD patterns showed a noticeable decline in structural elements, including crystallinity level. The transmittances of the investigated samples decrease as Er 3+ increases. Studies on UV-Vis absorption have revealed that the UV-Vis absorption spectra are shifting to the higher wavelengths, causing a decrease in the optical energy bandgap values from 4.66 to 3.48 eV for an indirect transition and from 5 to 4.84 eV for a direct transition, which suggests that the filler interacts with the blend matrix. As the number of localized states in the forbidden energy bandgap rises, it has been shown that with increasing Er 3+ -the estimated Urbach's energy increases from 1.95 to 32 meV. The addition of erbium ions raises the refractive index of the blend film. The optical limits of the samples are investigated using a He-Ne laser beam with a wavelength of 632.8 nm and a solid-state green diode laser beam with a wavelength of 532 nm. The prospect of greater charge carrier concentration and mobility was confirmed by increased AC conductivity with increasing frequency. Dielectric permittivity and dielectric loss tangent were utilized to analyze dielectric behavior. The analysis of the electric modulus (M 0 and M 00 ) of as-prepared samples has been completed. These findings are anticipated to notably impact a broad spectrum of applications, including organic semiconductors, optoelectronic devices, polymer solar cells, and polymer waveguides. K E Y W O R D Sdielectric characteristics, erbium ions (Er 3+ )-doped PVA/PVP, optical limiting/CUT-OFF laser filters, refractive index-bandgap analysis, XRD/FTIR

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Improving dielectric properties, electrical conductivity, and thermal properties of biodegradable polymer composites prepared with lanthanum

2022

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The precipitation method was adapted to synthesize the poly(ε-caprolactonecopolymer-ethylene oxide) (ε-CL-co-EO) composite with the salt of lanthanum (La), a rare earth element. This salt was incorporated into the polymer of different weight percentages to study how it affects the thermal and dielectric properties of the polymer. The resulting products were characterized by Fourier Transform Infrared Spectroscopy, X-ray diffractometry (XRD), Scanning electron microscopy (SEM) and thermogravimetric analysis. XRD and SEM data show that the polymer mixes homogeneously with the metal salt. Thermal degradation data show that the thermal stability of composites synthesized with La is lower than that of pure polymer. The dielectric properties and A.C conductivity measurements of the composites were investigated by using impedance analyzer in the frequency range (100 Hz to 20 kHz) at room temperature. The electrical property results of (ε-CL-co-EO)/La composites displayed that dielectric constant (έ), dielectric loss (ε"), tan delta (tan δ) and A.C electrical conductivity (σ ac ) increase with increasing La content. The largest conductivity of (ε-CL-co-EO)/La composite filled with 20 wt% La was 8.80 Â 10 À8 S/cm, which was 162% times pure (ε-CL-co-EO). In addition, impedance (IZI) of composites was evaluated from the dielectric data. This procedure is eco-friendly and easy to handle, which provides a promising route to polymer composites in the application of the conductivity field.

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Tailoring variations in the linear optical and radiation shielding parameters of PVA polymeric composite films doped with rare-earth elements

Cited by 27 publications

References 69 publications

Role of Cu/ZnO Nanostructures Doping on the Optical Behavior of Polyvinyl Alcohol/Polyvinyl Pyrrolidone/Graphene Composites for Optoelectronic Applications

Role of Cu/ZnO Nanostructures Doping on the Optical Behavior of Polyvinyl Alcohol/Polyvinyl Pyrrolidone/Graphene Composites for Optoelectronic Applications

Synthesis, characterization, and tailoring variations in the linear optical of erbium‐ions doped (PVA/PVP) polymeric composites for optical devices: Improvement of the dielectric characteristics

Improving dielectric properties, electrical conductivity, and thermal properties of biodegradable polymer composites prepared with lanthanum

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