Effect of Yb3+ substitution on the structural and optical properties of Ba1-xYbxWO4 nanoparticles-NIR luminescence emissions for optical communication and bioanalyses

Stephen, Seenamol K.; Varghese, Thomas

doi:10.1016/j.matchar.2021.110985

Cited by 8 publications

(3 citation statements)

References 63 publications

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“…The XRD patterns of Al The average crystallite sizes, interplanar spacing, lattice parameters, cell volumes and structure type of the prepared aluminate were evaluated from the XRD data. The average crystallite size (D) of the prepared powders was calculated from the full width at half maximum intensity (FWHM = b) by using the empirical relation [30][31][32]:…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Mahi,

Benabdellah,

Elassad Zemallach Ouari

et al. 2024

Indian J Phys

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The aluminate nano-powders Al 2 XO 4 (X = Cd, Ni and Co), crystallizing in a cubic spinel, were prepared by combustion method at 900°C. The effects of cations on the structure, optical properties and distribution of the cations as well as the binding energy of the samples were studied by X-ray diffraction (XRD), UV-Vis diffuse re ectance and FT-IR) spectroscopy. The XRD analysis con rmed the spinel structure of all samples, and showed that the average crystallite size of Al 2 XO 4 increases from 23.89 to 32.72 nm, while the lattice parameter changes from 8.0490 to 8.1066 Å when going from Ni to Co. As expected, the FT-IR spectroscopy of Al 2 XO 4 showed the presence of the fundamental absorption peaks in the region (400-745 cm − 1 ), con rming the formation of the aluminate spinels. The slight shift toward longer wavenumbers is due to the low electronegativity of Cd. The forbidden bands (E g ), determined by diffuse re ectance, were found to be 3.78, 3.82 and 3.75 eV respectively for Al 2 CdO 4 , Al 2 NiO 4 and Al 2 CoO 4 , assigned to the charge transfer O 2− : 2p → X 2+ : d orbital, making our spinels good candidates for optoelectronic and photocatalytic applications.

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Mahi,

Benabdellah,

Elassad Zemallach Ouari

et al. 2024

Indian J Phys

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“…2). Double Voigt was used for profile fitting [6]. The results of the refinement establish a pure scheelite-type tetragonal phase with space group I41/a (88) and point group symmetry C 6 4h for the BaWO4.…”

Section: Xrdmentioning

confidence: 99%

“…BaWO4 is an important optical material suitable for blue luminescence emission. It can be used in multifunctional applications like host material in solid-state lasers [1], photocatalyst [2,3], photoluminescence [4][5][6], and phosphors [7]. This dielectric material with a high refractive index, chemical stability, and x-ray absorption coefficient makes it potential material for technologically important applications [8,9].…”

Section: Introductionmentioning

confidence: 99%

Structural and Dielectric Characterization of Nanocrystalline BaWO<sub>4</sub>

Stephen¹,

Xavier²,

Varghese

2023

AMR

Self Cite

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BaWO4 samples prepared by the chemical precipitation method were structurally characterized by X-ray diffraction and scanning electron microscopic measurements. The results confirm the tetragonal scheelite-type structure of the BaWO4 sample. The dependence of εꞌ, tanδ, and ac conductivity with frequency and temperature was studied for the nanocrystalline BaWO4 calcined samples. It is found that all these factors hinge on temperature and frequency. The values of εꞌ and tanδ are high at low frequencies and their values decrease quickly with the increase in frequency. Both εꞌ and tanδ attain steady values at high frequency regime. The space charge polarization is the cause of exponential decrease of εꞌ at the low frequency. It is also found that the calcination temperature is a key factor in determining the dielectric properties of a material. The low and steady value of the dissipation factor and an almost steady value of the εꞌ suggest the suitability of BaWO4 materials in low-temperature co-fired ceramic applications. The deviation of ac conductivity against frequency comply with Jonscher’s power law, however, a small deviation in the low-frequency region is due to the Maxwell-Wagner-type effect.

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Insight into the photoluminescence and thermoluminescence properties of Tb ions doping KCl crystal grown by Cz method

Li,

Xu,

Meng

et al. 2023

J Mater Sci: Mater Electron

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Effect of Yb3+ substitution on the structural and optical properties of Ba1-xYbxWO4 nanoparticles-NIR luminescence emissions for optical communication and bioanalyses

Cited by 8 publications

References 63 publications

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Structural and Dielectric Characterization of Nanocrystalline BaWO<sub>4</sub>

Insight into the photoluminescence and thermoluminescence properties of Tb ions doping KCl crystal grown by Cz method

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