Nature of Dielectric Properties, Electric Modulus and AC Electrical Conductivity of Nanocrystalline ZnIn2Se4 Thin Films

El-Nahass, M.M.; Attia, A. A.; Ali, H.A.M.; Salem, G.F.; Ismaïl, Mohamed

doi:10.1007/s11664-018-6126-8

Cited by 16 publications

(7 citation statements)

References 27 publications

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“…where σ AC is the AC conductivity, σ DC is the DC-like conductivity where the AC conductivity behaves frequencyindependent, A is a temperature-dependent constant, and s is the frequency-dependent exponent. 25,31,[34][35][36] The activation energies belonging to relaxation mechanisms can be calculated from the graph by the equation below:…”

Section: Evaluation Of Dielectric Spectroscopy Measurement Resultsmentioning

confidence: 99%

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Thickness‐dependent glass transition temperature of hydroxyethyl cellulose thin films based on dielectric properties

Ulutas,

Yakut,

Bozoglu

et al. 2024

J of Applied Polymer Sci

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Hydroxyethyl cellulose (HEC) thin films with a molecular weight of 720,000 g/mol deposited by thermal evaporation in a thickness range of 250, 500, and 750 nm were measured in a frequency range of 1–105 Hz and a temperature range of 233–373 K for dielectric characterization with increments of 10 K. Dielectric results were used to derive and evaluate the glass transition temperature and ductility, which are essential parameters for structural analysis. Results showed that the thickness of HEC thin films was an effective parameter on dielectric and structural properties. Because of the increasing thickness, the dielectric constant has values between 22 and 143 at 1 kHz, and glass transition temperature and ductility change between 211–175 K and 15–20, respectively. Based on the literature and the compatible results, the main effect of these variations could be dead layers and voids in structure. The effect of the dead layer gave an important idea about the adjustability of mechanical properties of HEC thin films depending on the thickness. In this way, it would be possible to use these thin films deposited from HEC with 720,000 g/mol molecular weight, especially in drug delivery, electrophoresis technologies, biomedical devices, and coverage applications.

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Section: Evaluation Of Dielectric Spectroscopy Measurement Resultsmentioning

confidence: 99%

“…Jonscher's universal power law is below:

σ_{AC} (ω) = σ_{DC} + A ω^{s},

where σ AC is the AC conductivity, σ DC is the DC‐like conductivity where the AC conductivity behaves frequency‐independent, A is a temperature‐dependent constant, and s is the frequency‐dependent exponent 25,31,34–36 …”

Section: Methodsmentioning

confidence: 99%

Thickness‐dependent glass transition temperature of hydroxyethyl cellulose thin films based on dielectric properties

Ulutas,

Yakut,

Bozoglu

et al. 2024

J of Applied Polymer Sci

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“…The ac electrical conductivity is assigned as; σ t = σ dc + σ ac, 59 where σ dc is the dc conductivity. Figure 9 displayed the frequency‐dependent of ac electrical conductivity σ ac for Gd(III) complex‐PVA films as a representative example in the range of temperatures (298–418 K).…”

Section: Resultsmentioning

confidence: 99%

“…The ac electrical conductivity is assigned as; σ t = σ dc + σ ac, 59 where σ dc is the dc conductivity.…”

Section: Ac Electrical Conductivity Featuresmentioning

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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“…In addition, the ac conductivity may be analyzed by Arrhenius equation defined as follows 23,28,[38][39][40][41] I indicates the computed values of E a and σ 0 . While the E a value for Region 1 decreases with increase in the frequency, the E a value for Region 2 increases with the increase in temperature.…”

Section: Resultsmentioning

confidence: 99%

Dielectric, Conductivity and Modulus Properties of Au/ZnO/p-InP (MOS) Capacitor

Acar

Uyar

Tataroğlu

2023

ECS J. Solid State Sci. Technol.

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Dielectric, conductivity, and modulus properties of a metal oxide semiconductor (MOS) capacitor with zinc oxide (ZnO) interlayer produced via radio-frequency magnetron sputtering were investigated using admittance spectroscopy measurements. Frequency and temperature dependence of the complex dielectric permittivity (*='-i''), dielectric loss factor (tan ), ac conductivity (ac), and complex electric modulus (M*=M'+iM'') were studied in temperature interval of 100-400 K for two frequencies (100 and 500 kHz). While the dielectric constant (') and loss ('') value increase as the temperature rises, their values decrease as the frequency rises. The increase in ' and '' is explained by thermal activation of charge carriers. Also, the ac value increases both frequency and temperature increase. The thermal activation energy was determined from slope of Arrhenius plot.

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Nature of Dielectric Properties, Electric Modulus and AC Electrical Conductivity of Nanocrystalline ZnIn2Se4 Thin Films

Cited by 16 publications

References 27 publications

Thickness‐dependent glass transition temperature of hydroxyethyl cellulose thin films based on dielectric properties

Thickness‐dependent glass transition temperature of hydroxyethyl cellulose thin films based on dielectric properties

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

Dielectric, Conductivity and Modulus Properties of Au/ZnO/p-InP (MOS) Capacitor

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