Synthesis of BaF2:Ce nanophosphor and epoxy encapsulated transparent nanocomposite

Kang, Zhitao; Barta, M. Brooke; Nadler, Jason H.; Wagner, B. K.; Rosson, Robert; Kahn, Bernd

doi:10.1016/j.jlumin.2011.05.030

Cited by 21 publications

(13 citation statements)

References 21 publications

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“…If the ratio of the refractive indices n p : n m is kept close to 1, high optical transparency across a thick nanocomposite with high nanoparticle loading is achieved. 22 In the Gd 2 O 3 –PVT nanocomposites, n p : n m = 1.80 : 1.55. And the fairly small n p of Gd 2 O 3 among heavy metal oxides leads to this high transmittance.…”

Section: Resultsmentioning

confidence: 99%

“…Epoxy nanocomposites embedded with BaF 2 :Ce nanophosphors are also reported with limited success. 22 Nanocomposites comprising quantum dots dispersed in a conjugated polymer matrix have also been investigated; however, they were prepared by spin-coating and were only several hundred nanometers thick. They were too thin to attenuate high energy photons, since the mean free path of an X- or γ-ray in solid matter ranges from tens of microns to tens of centimeters depending on their energy.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of bulk-size transparent gadolinium oxide–polymer nanocomposites for gamma ray spectroscopy

et al. 2013

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Heavy element loaded polymer composites have long been proposed to detect high energy X- and γ-rays upon scintillation. The previously reported bulk composite scintillators have achieved limited success because of the diminished light output resulting from fluorescence quenching and opacity. We demonstrate the synthesis of a transparent nanocomposite comprising gadolinium oxide nanocrystals uniformly dispersed in bulk-size samples at a high loading content. The strategy to avoid luminescence quenching and opacity in the nanocomposite was successfully deployed, which led to the radioluminescence light yield of up to 27 000/MeV, about twice as much as standard commercial plastic scintillators. Nanocomposites monoliths (14 mm diameter by 3 mm thickness) with 31 wt% loading of nanocrystals generated a photoelectric peak for Cs-137 gamma (662 keV) with 11.4% energy resolution.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of bulk-size transparent gadolinium oxide–polymer nanocomposites for gamma ray spectroscopy

et al. 2013

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“…Recent experiments have nonetheless made use of polyepoxyde as a matrix because of its easy handling that does not need any advanced chemistry knowledge. Encapsulation of inorganic fluor BaF 2 :Ce was attempted24 following in the footsteps of early 1990s technology 25. Crystals, 50 nm in size, were successfully and homogeneously trapped in the matrix after curing.…”

Section: Modifications Of Polymeric Matrix For Special Applicationsmentioning

confidence: 99%

Current Status on Plastic Scintillators Modifications

Bertrand

Hamel

Sguerra

2014

Chemistry A European J

118

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Recent developments of plastic scintillators are reviewed, from 2000 to March 2014, distributed in two different chapters. First chapter deals with the chemical modifications of the polymer backbone, whereas modifications of the fluorescent probe are presented in the second chapter. All examples are provided with the scope of detection of various radiation particles. The main characteristics of these newly created scintillators and their detection properties are given.

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“…Because of their low stopping power, they are unsuitable for high energy X and gamma radiation [1,2]. In the last two decades new composites of polymer base organic scintillators doped by inorganic nanoparticles were suggested [3][4][5][6][7][8][9]. The transfer energy referred as forester mechanism could lead to the enhancement of composites luminescence.…”

Section: Introductionmentioning

confidence: 99%

“…This problem can be solve by using small size of nanoparticles as a filler via increasing the index matching of the components [4]. For example, Kang et al [5] matched index of nanoparticles and the polymer matrix and reported some nanocomposites with high transparency. Cai et al [6] reported on luminescence quenching of the polymer due to the charge transfer between the polymer and BiI 3 in a conjugated polymer composite with BiI 3 .…”

Section: Introductionmentioning

confidence: 99%

Enhancement in photoluminescence properties of organic compound PS/PPO by cerium fluoride nanoparticles doping

et al. 2019

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Herein, a new polymeric nanocomposite of 2,5-diphenyloxazole (PPO) and polystyrene (PS) doped with cerium fluoride (CeF 3) nanoparticles (PS/PPO/CeF 3) was prepared, characterized and its photoluminescence property was reported for the first time. The PS as a base matrix and PPO as a fluor were chose for a scintillator solution substrate and CeF 3 nanoparticles dispersed into it to construct a new nanocomposite scintillator. The PS liquid polymeric matrix with 0.5 wt% of PPO was loaded with different percentage of CeF 3 nanoparticles. Structural characterizations showed successful preparation of nanocomposites and a mean size of CeF 3 nanoparticles as (13 ± 3) nm in the base polymer matrix. The measured photoluminescence showed an enhancement about 3 times in comparison to PS/PPO composite when 10% of CeF 3 nanoparticles doped into the polymeric composite matrix under UV excitation. This effect is due to fluorescence resonance energy transfer in Ce 3+ ions (5d → 4f transition energy) to the PPO within the PS/PPO/CeF 3 nanocomposite. Observed results were presented and discussed.

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Synthesis of BaF2:Ce nanophosphor and epoxy encapsulated transparent nanocomposite

Cited by 21 publications

References 21 publications

Synthesis of bulk-size transparent gadolinium oxide–polymer nanocomposites for gamma ray spectroscopy

Synthesis of bulk-size transparent gadolinium oxide–polymer nanocomposites for gamma ray spectroscopy

Current Status on Plastic Scintillators Modifications

Enhancement in photoluminescence properties of organic compound PS/PPO by cerium fluoride nanoparticles doping

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