Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Tailoring Photoluminescence and X-ray Storage Properties in Mechanochemically Prepared Nanocrystalline CaF₂:Sm3+
View through CrossRef
The mechanochemical preparation of nanocrystalline CaF2:Sm3+ by ball milling calcium acetate hydrate, samarium (III) acetate hydrate, and ammonium fluoride is reported. The photoluminescence of the as-prepared CaF2:Sm3+ shows predominantly Sm3+ 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2, and 11/2) f-f luminescence, but electric dipole allowed 4f55d (T1u) → 4f6 7F1 (T1g) luminescence by Sm2+ was generated upon X-irradiation. In comparison with the co-precipitated CaF2:Sm3+, the conversion of Sm3+ "→" Sm2+ in the ball milling-sample upon X-irradiation is significantly lower. Importantly, the present results indicate that the crystallite size and X-ray storage phosphor properties of the lanthanide-doped nanocrystalline CaF2 can be modified by adjusting the ball milling time, dopant concentration, and post-annealing treatment, and crystallite sizes as low as 6 nm resulted under specific experimental conditions.
Title: Tailoring Photoluminescence and X-ray Storage Properties in Mechanochemically Prepared Nanocrystalline CaF₂:Sm3+
Description:
The mechanochemical preparation of nanocrystalline CaF2:Sm3+ by ball milling calcium acetate hydrate, samarium (III) acetate hydrate, and ammonium fluoride is reported.
The photoluminescence of the as-prepared CaF2:Sm3+ shows predominantly Sm3+ 4G5/2 → 6HJ (J = 5/2, 7/2, 9/2, and 11/2) f-f luminescence, but electric dipole allowed 4f55d (T1u) → 4f6 7F1 (T1g) luminescence by Sm2+ was generated upon X-irradiation.
In comparison with the co-precipitated CaF2:Sm3+, the conversion of Sm3+ "→" Sm2+ in the ball milling-sample upon X-irradiation is significantly lower.
Importantly, the present results indicate that the crystallite size and X-ray storage phosphor properties of the lanthanide-doped nanocrystalline CaF2 can be modified by adjusting the ball milling time, dopant concentration, and post-annealing treatment, and crystallite sizes as low as 6 nm resulted under specific experimental conditions.
Related Results
Photoluminescence Properties of X-Ray Generated Divalent Sm in Mechanochemically Prepared Nanocrystalline CaF₂:Sm3+
Photoluminescence Properties of X-Ray Generated Divalent Sm in Mechanochemically Prepared Nanocrystalline CaF₂:Sm3+
In this study, the mechanochemical preparation of nanocrystalline CaF2:Sm3+ by ball milling calcium acetate hydrate, samarium (III) acetate hydrate, and ammonium fluoride is report...
Potable Water Sources, Household Hygiene, and Sanitation Practices in Ikpoba Okha LGA, Edo State: Implications for Public Health and Sustainable Water Management
Omoregie, Andrew Edosa.1 Omoregie Abieyuwa Peace2 Okoro, Enyinnaya Okoro.3
1 College of Medi
Potable Water Sources, Household Hygiene, and Sanitation Practices in Ikpoba Okha LGA, Edo State: Implications for Public Health and Sustainable Water Management
Omoregie, Andrew Edosa.1 Omoregie Abieyuwa Peace2 Okoro, Enyinnaya Okoro.3
1 College of Medi
BACKGROUND
Access to potable drinking water and sufficient sanitation continues to be an urgent global concern, particularly in developing regions where con...
Synthesis and Luminescence Studies of Sm3+ Doped Ca9Y(PO4)7 Orange-Red-Emitting Phosphor
Synthesis and Luminescence Studies of Sm3+ Doped Ca9Y(PO4)7 Orange-Red-Emitting Phosphor
Ca9Y(PO4)7:Sm3+ phosphor was prepared via solid state reaction. The crystal structure of the phosphor was characterized by X-ray powder diffraction (XRD). The photoluminescence (PL...
Photoluminescence studies on LiNa5(PO4)2:Dy3+, Sm3+phosphor
Photoluminescence studies on LiNa5(PO4)2:Dy3+, Sm3+phosphor
AbstractThis paper describes the preparation, structure and photoluminescence properties of a new class LiNa5(PO4)2:Dy3+, Sm3+-phosphor. Crystalline nature confirmed by X-ray diffr...
Handling The Oil Zone On Troll
Handling The Oil Zone On Troll
Abstract
The Troll field is a giant gas field but below the gas cap 4 billion barrels of oil are located in an oil layer varying from 4–27m and covering an area o...
Carbon Storage Assurance Facility Enterprise (CarbonSAFE): Carbon Storage Infrastructure Development for a Sustainable Future
Carbon Storage Assurance Facility Enterprise (CarbonSAFE): Carbon Storage Infrastructure Development for a Sustainable Future
The U.S. Department of Energy (DOE) Office of Fossil Energy and Carbon Management’s (FECM) Carbon Transport and Storage (CTS) Program focuses on addressing technical and non-techni...
Red-Emitting Phosphor Ca2MgSi2O7: Sm3+, Eu3+ for UV White Light-Emitting Diodes
Red-Emitting Phosphor Ca2MgSi2O7: Sm3+, Eu3+ for UV White Light-Emitting Diodes
Abstract
In this research, a series of Ca2MgSi2O7: 2% Sm3+, x% Eu3+ (x=4, 5, 6, 7, 8) red phosphors were synthesized using the high-temperature solid-phase method. The phas...
Perovskite solar cells prepared by processing CsPbBr<sub>3</sub> nanocrystalline films in low temperature solution
Perovskite solar cells prepared by processing CsPbBr<sub>3</sub> nanocrystalline films in low temperature solution
<sec>In the process of preparing perovskite polycrystalline films by solution method, toxic solvents are used, and heat treatment is still the main way to induce perovskite g...