Synthesis and optical studies of gamma irradiated Eu doped nanocrystalline CaF2

Pandurangappa, C.; Lakshminarasappa, B.N.; Nagabhushana, B.M.

doi:10.1016/j.jallcom.2011.04.135

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…The absorption peaks around 2930 and 2850 cm −1 are caused by organic groups that may be due to the adsorption of oleic acid ester on the surface of fluorite [ 42 ]. The two absorption peaks at 2360 and 2330 cm −1 are caused by the asymmetric stretching vibration of CO 2 [ 4 , 21 ]. The generation of 2360 and 2330 cm −1 may be related to the inclusion of CO 2 in the fluorite or the CO 2 in the air [ 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…Table 2 summarizes the possible formation mechanisms of the emission peak. The broad emission centered at 425 nm was caused by the 4 f 7 -4 f 6 5 d 1 transition of Eu 2+ [ 21 , 22 , 23 , 24 , 25 ]. The luminescence center at 452 nm may be caused by 1 D 2 - 3 H 4 of Tm 3+ [ 26 , 27 , 28 , 29 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…Studies have shown that in addition to the common blue fluorescence, some fluorites also show fluorescence of other colors, such as yellow, yellow-green, green, and red [ 16 , 17 , 18 , 19 , 20 ]. The discussion on the luminescence mechanism of fluorite has continued to be in-depth [ 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

et al. 2022

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Fluorite is rich in mineral resources and its gorgeous colors and excellent luminescence characteristics have attracted the attention of many scholars. In this paper, the composition, structure, luminescent properties, and the potential application value of three fluorites with different colors and are systematically analyzed. The results show that REE and radioactive elements have effects on the structure, color, and luminescence of fluorite. Radioactive elements Th and U will aggravate the formation of crystal defects in fluorite. The green color is related to Ce3+ and Sm2+. Colloidal calcium and F− center are responsible for the blue-purple color of fluorite. There are many luminescent centers, such as Eu, Pr, Dy, Tb, Er, and Sm, in fluorite. The blue fluorescence is mainly caused by 4f7-4f65d1 of Eu2+. In addition, it is found that fluorite has certain temperature sensing properties in the temperature range of 303–343 K.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

et al. 2022

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“…However, the TL and PL properties of this nanomaterial have not been well studied. Few studies were focused on the effect of different dopants on its optical properties [34][35][36]. Other investigations were focused on different routes for the syntheses of CaF 2 nanocrystals and study of the upconversion luminescence by doping with some rare earths [37,38].…”

Section: Introductionmentioning

confidence: 99%

Luminescence Properties of CaF₂ Nanostructure Activated by Different Elements

Salah

Alharbi

Habib

et al. 2015

Journal of Nanomaterials

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Nanostructures of calcium fluoride (CaF2) doped with Eu, Tb, Dy, Cu, and Ag were synthesized by the coprecipitation method and studied for their thermoluminescence (TL) and photoluminescence (PL) properties. The PL emission spectrum of pure CaF2nanostructure has a broad band in the 370–550 nm range. Similar spectra were observed in case of doped samples, beside extra bands related to these impurities. The maximum PL intensity was observed in Eu doped sample. The TL results of Eu, Cu, Ag, and Tb doped samples show weak glow peaks below 125°C, whereas Dy doped one is found to be highly sensitive with a prominent peak at 165°C. This sample was further exposed to a wide range of gamma rays exposures from137Cs source. The response curve is linear in the 100 Gy-10 kGy range. It is also observed that the particle size of CaF2nanostructure was significantly reduced by increasing Dy concentration. These results showed that Dy is a proper activator in the host of CaF2nanostructure, providing a highly sensitive dosimeter in a wide range of exposures and also plays a role as a controlling agent for particle size growth.

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“…Salah et al [7] have evaluated Dy doped CaF 2 nanostructure for its TL response to high exposures of gamma rays. Pandurangappa et al [8] synthesized Eu doped CaF 2 nanoparticles by coprecipitation method to study the optical absorption and photoluminescence (PL) properties after gamma rays irradiation. They have added nitric acid (HNO 3 ) in to the mixture and showed particle size of about 25 nm.…”

Section: Introductionmentioning

confidence: 99%

Size Controlled CaF₂ Nanocubes and Their Dosimetric Properties Using Photoluminescence Technique

Alharbi

2015

Journal of Nanomaterials

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A new synthetic chemical coprecipitation route for the preparation of well-crystallized size controlled nano- and microcrystalline cubes of CaF2is reported. Crystalline cubes in the range of 2 μm–20 nm could be synthesized and their sizes were controlled by varying the solvent : cosolvent ratio. The as-synthesized CaF2nanocubes were characterized by different techniques. Photoluminescence (PL) emission spectrum of CaF2nanocrystalline powder showed strong emission band at 415 nm. Moreover, the effect of Eu as a dopant on the emission spectrum of CaF2was investigated. This dopant was found to get incorporated in its Eu2+and Eu3+forms. The as-produced nanocubes were exposed to UV irradiation and the corresponding PL emission was studied. Excellent results are obtained, where CaF2:Eu nanocubes were found to be highly sensitive and might be suitable for esteeming the doses of UV irradiation using the PL technique.

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Synthesis and optical studies of gamma irradiated Eu doped nanocrystalline CaF2

Cited by 11 publications

References 16 publications

Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

Luminescence Properties of CaF₂ Nanostructure Activated by Different Elements

Size Controlled CaF₂ Nanocubes and Their Dosimetric Properties Using Photoluminescence Technique

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Synthesis and optical studies of gamma irradiated Eu doped nanocrystalline CaF2

Cited by 11 publications

References 16 publications

Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

Mineralogical Characteristics and Luminescent Properties of Natural Fluorite with Three Different Colors

Luminescence Properties of CaF2 Nanostructure Activated by Different Elements

Size Controlled CaF2 Nanocubes and Their Dosimetric Properties Using Photoluminescence Technique

Contact Info

Product

Resources

About

Luminescence Properties of CaF₂ Nanostructure Activated by Different Elements

Size Controlled CaF₂ Nanocubes and Their Dosimetric Properties Using Photoluminescence Technique