Effect of γ-ray irradiation on structure formation and optical constants of thermally evaporated rhodamine B thin films

Zeyada, H.M.; El-Nahass, M.M.; Samak, S.A.

doi:10.1016/j.jnoncrysol.2012.01.008

Cited by 26 publications

(2 citation statements)

References 32 publications

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“…where t is the sample thickness and A expresses the absorbance. The value of the optical band gap E g is related to the absorption coefficient using the equation [74]:…”

Section: Uv-visible Absorption Spectrummentioning

confidence: 99%

Physico-Chemical Characterization, DFT Modeling and Biological Activities of a New Zn (II) Complex Containing Melamine as a Template

et al. 2023

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Single crystals of a new organic–inorganic hybrid compound (C3H7N6)2[ZnCl4]·H2O was synthesized and characterized by X-ray diffraction at room temperature, FT-IR and FT-Raman spectroscopies, optical absorption and photoluminescence behavior. The title compound belongs to the triclinic space group P1¯, and in the crystal structure, the inorganic layers are built from tetrachloridozincate anions [ZnCl4]2− and free water molecules, linked together by O–H···Cl hydrogen bonds and halogen···halogen interactions. In addition, Hirshfeld surfaces and 2D fingerprint plots estimate the weak intermolecular interactions accountable for the generation of crystal packing. The optimized geometry, vibrational frequencies and various thermodynamic parameters of the title compound calculated using density functional theory (DFT) methods are in agreement with the experimental values. The theoretical calculations were performed using the DFT method at WB97XD/Lanl2dz basis set levels and we discussed topological analysis of atoms in molecules (AIM) at the BCP point. A detailed interpretation of the IR and Raman spectra were reported. Additionally, the simulated spectrum satisfactorily coincided with the experimental UV-Visible spectrum. A wide band gap exceeding 4 eV of the synthesized compound was recorded. The photoluminescence (PL) was characterized through two bands successively at 453 and 477 nm. Ultimately, antimicrobial activity and enzymatic inhibition assays of the complex were also investigated through microbial strains, agar diffusion method, minimum inhibitory concentration (MIC) determination, lipase and phospholipase A2 inhibition.

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“…where t is the sample thickness and A expresses the absorbance. The value of the optical band gap E g is related to the absorption coefficient using the equation [74]:…”

Section: Uv-visible Absorption Spectrummentioning

confidence: 99%

Physico-Chemical Characterization, DFT Modeling and Biological Activities of a New Zn (II) Complex Containing Melamine as a Template

et al. 2023

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“…This may be due to the lattice vibrations and free carriers contribution [33]. Also, the plasma frequency, , can be deduced according to the Drude model, via the relationship between and the ratio N/m* [34]:…”

Section: Optical Characterizationmentioning

confidence: 99%

Effect of gamma irradiation on structural, morphological and optical properties of p-quaterphenyl thin films

Attia¹,

Saadeldin²,

Sawaby³

2018

JAP

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Para-quaterphenyl thin films were deposited onto glass and quartz substrates by thermal evaporation method. p-quaterphenyl thin films wereexposed to gamma radiation of Cobat-60 radioactive source at room temperature with a dose of 50 kGy to study the effect of ?-irradiation onthe structure and the surface morphology as well as the optical properties of the prepared films. The crystalline structure and the surface morphology of the as-deposited and ?-irradiated films were examined using the X-ray diffraction and the field emission scanning electron microscope. The optical constants (n & k) of the as-deposited and ?-irradiated films were obtained using the transmittance and reflectance measurements, in the wavelength range starting from 250 up to 2500 nm. The analysis of the absorption coefficient data revealed an allowed direct transition with optical band gap of 2.2 eV for the as-deposited films, which decreased to 2.06 eV after exposing film to gamma irradiation. It was observed that the Urbach energy values change inversely with the values of the optical band gap. The dispersion of the refractive index was interpreted using the single oscillator model. The nonlinear absorption coefficient spectra for the as-deposited and ?-irradiated p-quaterphenyl thin films were obtained using the linear refractive index.

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Determination and analysis of linear and nonlinear optical properties and electrical conductivity of amorphous PbxGe42−xSe48Te10 thin films

et al. 2020

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Effect of γ-ray irradiation on structure formation and optical constants of thermally evaporated rhodamine B thin films

Cited by 26 publications

References 32 publications

Physico-Chemical Characterization, DFT Modeling and Biological Activities of a New Zn (II) Complex Containing Melamine as a Template

Physico-Chemical Characterization, DFT Modeling and Biological Activities of a New Zn (II) Complex Containing Melamine as a Template

Effect of gamma irradiation on structural, morphological and optical properties of p-quaterphenyl thin films

Determination and analysis of linear and nonlinear optical properties and electrical conductivity of amorphous PbxGe42−xSe48Te10 thin films

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