Temperature and frequency dependence of dielectric characteristics, modulus spectroscopy and AC electrical conductivity in Erythrosine B thin films

El-Zaidia, E.F.M.; Ali, H.A.M.

doi:10.1007/s10854-020-04922-2

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…Carriers must be restricted to the potential well at frequencies higher than the maximum value. As a result, the carriers can travel a short distance [46,47]. (M″) max location on the frequency axis corresponds to the relaxation peak, which is shifted to higher frequencies with rising temperature, and from the frequency ω max , the most probable relaxation time τ can be known as (τ.ω max ) = 1.…”

Section: Modulus Properties Of Pva -Erythrosin B Filmmentioning

confidence: 99%

Exploring the AC conductivity and dielectric properties of PVA films doped with Erythrosin B

Ali,

El-Zaidia,

Darwish

et al. 2024

Phys. Scr.

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Erythrosin B (EB) doped in PVA film was processed utilizing the casting procedure, and the structure was investigated via the Fourier Transformation infrared technique (FTIR). FTIR analysis presented a strong formation of intermolecular hydrogen bonds among PVA and EB hydroxyl groups (OH). Characteristic temperature and frequency variation of dielectric behavior and AC electrical conductivity for films of PVA doped with Erythrosin B were analyzed at (293-383 K) temperature and (102-106 Hz) frequency. The AC conductivity dependency indicates that the predominant conduction mechanism in PVA doped with Erythrosin B films follows the correlated barrier hopping (CBH) model. The charge carriers' hopping involving localized states causes a relaxation process. Estimates were made for the AC conductivity activation energy and the conductivity relaxation energy. Frequency and temperature affect the dielectric constant (e/) and the dielectric loss (e//). The complex impedance spectrum (Z/ vs. Z//) showed single semicircular arcs with a decreased radius with increasing temperature. The relaxation peaks in the electric modulus representation are clearly defined, and the relaxation period has been calculated.

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Section: Modulus Properties Of Pva -Erythrosin B Filmmentioning

confidence: 99%

Exploring the AC conductivity and dielectric properties of PVA films doped with Erythrosin B

Ali,

El-Zaidia,

Darwish

et al. 2024

Phys. Scr.

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show abstract

“…The AC electrical conductivity (σ ac ) of pure PVA, Nd(III), and Gd(III) complexes doped in PVA films were carried out in the 100 Hz-8 MHz range of frequency, f, using a programmable automatic RLC bridge (model Hioki 3,532 HiTester). The determinations of (σ ac [ω]) were estimated on the basis displayed elsewhere 27,28 at the range (298-418 K) of temperatures (where ω is the angular frequency = 2πf).…”

Section: Synthesis and Investigations Of Composite Polymermentioning

confidence: 99%

Dual function of new Nd(III) and Gd(III) complexes for cytotoxic and optoelectronic fields: Synthesis, characterization, DFT calculations, and PVA composite films

Ali

Saleh

Ali

et al. 2023

Applied Organom Chemis

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New two lanthanide complexes of Neodymium (III) and Gadolinium (III) ions were prepared based on 2‐Cyano‐N′‐([4‐oxo‐4H‐chromen‐3‐yl]methylene) acetohydrazide as a chelating agent. The prepared Nd(III) and Gd(III) complexes were characterized via elemental analysis, molecular conductance, IR, and TGA. The obtained results showed the chelating agent behaves as tridentate via oxygen of γ pyrone and carbonyl groups and nitrogen of the azomethine group. The antitumor activity of isolated complexes was investigated against the Ehrlich Ascites Carcinoma cell line (E.A.C). The results of antitumor activity cleared that Gd(III) complex has higher activity than Nd(III) complex and moderate activity relative to cisplatin and 5‐Furacil. Besides, DFT calculations were estimated for prepared Nd(III) and Gd(III) complexes by the Gaussian program. Theoretical parameters were calculated. The energy gap values confirmed the higher activity of the Gd(III) complex over the other Nd(III) complex. In addition, the composite films of Nd(III) and Gd(III) complexes were prepared using the cast technique. The electrical and optical absorption properties of these polymer composites were analyzed.

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Spectroscopic and computational studies of erythrosine food dye protonation in aqueous solution

et al. 2022

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Temperature and frequency dependence of dielectric characteristics, modulus spectroscopy and AC electrical conductivity in Erythrosine B thin films

Cited by 4 publications

References 45 publications

Exploring the AC conductivity and dielectric properties of PVA films doped with Erythrosin B

Exploring the AC conductivity and dielectric properties of PVA films doped with Erythrosin B

Dual function of new Nd(III) and Gd(III) complexes for cytotoxic and optoelectronic fields: Synthesis, characterization, DFT calculations, and PVA composite films

Spectroscopic and computational studies of erythrosine food dye protonation in aqueous solution

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