Tunable optical properties of some rare earth elements-doped mayenite Ca12Al14O33 nanopowders elaborated by oxalate precursor route

Rashad, M.M.; Mostafa, A.G.; Mwakikunga, Bonex W.; Rayan, D. A.

doi:10.1007/s00339-016-0654-y

Cited by 13 publications

(5 citation statements)

References 33 publications

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“…36 electronic band gap of 43.7 eV to 0 eV. 48,49 As such the material itself can exhibit a large range of tunable physical properties depending on the concentration of anionic electrons, which has already shown to be a consequential control parameter for macroscopic attributes, such as the glass transition temperature. 50 The mayenite framework has also proven robust with respect to presence of alternate ions in the pore space.…”

Section: Activated Electridesmentioning

confidence: 99%

Electrides: a review

et al. 2020

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Section: Activated Electridesmentioning

confidence: 99%

Electrides: a review

et al. 2020

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“…The aluminum phosphate glass FT-IR range was diverse with the aluminum coordinating number and the coordinating group state (''isolated'' or condensed'') in addition to the coupling among neighboring groups. Absorption bands in the region between 530-400 cm -1 may be assigned to the isolated AlO6octahedra while that lie between 680-500 cm -1 are related to the condensed AlO6 octahedra [40]. Additionally, the condensed AlO4 tetrahedra found in the region of 900-700 cm -1 are indexed whereas the isolated AlO4 tetrahedra found in the range of 800-650 cm -1 are identified [40].…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 98%

“…Absorption bands in the region between 530-400 cm -1 may be assigned to the isolated AlO6octahedra while that lie between 680-500 cm -1 are related to the condensed AlO6 octahedra [40]. Additionally, the condensed AlO4 tetrahedra found in the region of 900-700 cm -1 are indexed whereas the isolated AlO4 tetrahedra found in the range of 800-650 cm -1 are identified [40]. At 978 and 1170 cm -1 , a pair of peak bands connected to the Al-OH bonding are found [42].…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

Impact of Samarium Ions in the Structural and Optical Characteristics of Aluminum-Sodium Phosphate Glasses

Rayan,

Abdelghany,

Elshourbgy

et al. 2024

Advances in Basic and Applied Sciences

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The glass structure 50P2O5-30Na2O-10CaO-(10-x)Al2O3-(x)Sm2O3 was prepared using a standard melt annealing method, where x ranged from 0 to 8 mol% and with different Sm2O3 (x) concentrations. The impact of Sm 3+ ions in the produced glass network has been investigated using combined structural and optical properties. We looked at structural and optical factors like density, molar volume, and other optical properties. It was demonstrated that glassy samples are amorphous using X-ray diffraction. Empirical and experimental densities and molar volume are found to be having the same trend with increasing Sm2O3 contents. Fourier transform infrared absorption spectra (FTIR) have been carried out and analyzed using the deconvolution analysis route. Notable changes are observed within the fingerprint region from 450 cm -1 to 1700 cm -1 and prominent peaks are assigned to their respective phosphate vibrational groups. UV-VIS-NIR spectral data are plotted and different optical parameters such as optical energy gap, absorption and extension coefficients are calculated and interpreted in terms of direct and indirect transitions and correlated to their respective structural variations and state of samarium ions..

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“…F(R∞) is the so-called remission or Kubelka-Munk function. In the parabolic band structure, the band gap (Eg), and absorption coefficient (α), of a direct band gap semiconductor are related through the well known equation [42]:…”

Section: Optical Properties Uv-vis-nir Spectramentioning

confidence: 99%

Magnetic Properties and Induction Heating Ability Studies of Spinal Ferrite Nanoparticles for Hyperthermia Treatment of Tumours”

Rayan

Ismail

2019

Egypt. J. Biophys. Biomed. Engng.

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I N this research synthesizesnanocrystallineCuFe 2 O 4 spinel structure using co-precipitation method. X-ray diffraction (XRD), transmissionelectron microscopy (TEM), and vibrating sample magnetometer (VSM) are utilized in order to study crystalline size, lattice parameters, microstructure and optical and magnetic properties of the formed nanopowders.Hyperthermia is one of the most promising approaches in cancer therapy. The most commonly used heating method in the clinical setting is capacitive heating that uses a radiofrequency (RF) electric field.The induction heating behavior and heating properties of the CuFe 2 O 4 nanoparticles in an alternating magnetic field at 150-300 kHz were estimated.The resultmaking Cu ferrite appropriate for hyperthermia treatment of cancer.These results will help us to optimize the conditionsfor tumor treatment by magnetic nanoparticles.

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Tunable optical properties of some rare earth elements-doped mayenite Ca12Al14O33 nanopowders elaborated by oxalate precursor route

Cited by 13 publications

References 33 publications

Electrides: a review

Electrides: a review

Impact of Samarium Ions in the Structural and Optical Characteristics of Aluminum-Sodium Phosphate Glasses

Magnetic Properties and Induction Heating Ability Studies of Spinal Ferrite Nanoparticles for Hyperthermia Treatment of Tumours”

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