Photoluminescence, radioluminescence and optically stimulated luminescence in nanoparticle and bulk KMgF3(Eu)

Schuyt, J.J.; Williams, G. V. M.

doi:10.1016/j.jlumin.2018.08.056

Cited by 23 publications

(52 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, RE 3+ -doped fluorides exhibit characteristic properties, such as high ionicity, low refractive index, wide band gap, and low phonon energy. KMgF 3 (Schuyt and Williams, 2018 ), NaYF 4 (Wu et al, 2019 , 2020 ), NaGdF 4 (Yi et al, 2019 ), and LaF 3 (Bekah et al, 2016 ; Nampoothiri et al, 2017 ) have been investigated and exhibit high quantum yields and long luminescent lifetimes. RE 3+ -doped fluorides have been attracting attentions for several years due to the wide variety of technological applications including biomedical researches (All et al, 2019 ; Yan et al, 2019 ), biosensors (Vijayan et al, 2019 ), bioimaging (Hu et al, 2016 ; Han et al, 2017 ; Zeng et al, 2019 ), radiation detection (Ju et al, 2017 ), optoelectronic devices (Wu et al, 2018 ), and so on.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

Wang

Huang

et al. 2020

Front. Chem.

View full text Add to dashboard Cite

In this work, cerium-doped LaF 3 nanoparticles (LaF 3 :Ce NPs) were successfully synthesized and characterized. Its chemiluminescence (CL) property was studied, and it was amazingly found that it intensely enhanced the ultra-weak CL of the NaNO 2-H 2 O 2 system. The CL mechanism was systematically investigated and suggested to be the recombination of electron-injected and hole-injected LaF 3 :Ce NPs. The new CL system was developed to be a facile, original, and direct method for nitrite analysis. Experimental conditions were optimized and then a satisfactory linear relationship between CL intensity and nitrite concentration was obtained. This work introduced a new pathway for the research and application of traditional fluoride NPs doped with RE 3+ .

show abstract

Section: Introductionmentioning

confidence: 99%

Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

Wang

Huang

et al. 2020

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…The 585 nm emission was due to the 4 T 1 (G) → 6 A 1 (S) transition of Mn 2+ . The 445 nm emission was due to the presence of trace oxygen in the host lattice [27,62,104]. The excitation spectra for the oxygen-related impurity centres are shown in figure 4.3 (b), where components at approximately 275 nm, 320 nm, and 370 nm are clear.…”

Section: Namgf 3 :Mnmentioning

confidence: 99%

“…To minimise this effect, some compounds are delivered a high priming dose in order to saturate the trap concentrations [27]. In other cases, algebraic manipulations of distinct emission intensities may be employed in order to achieve a signal that does not vary in time [62]. RL has been exploited in the development of several fibre-optic dosimeters [15,46,63], though these often suffer from the aforementioned effects, as well as undesirable luminescence from Cherenkov radiation and the fibre itself.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The lanthanides (Ln) constitute a series of chemical elements, ranging from La to Lu (atomic numbers [57][58][59][60][61][62][63][64][65][66][67][68][69][70][71], that exhibit unique physical and luminescence properties that have made them useful in several applications, including storage phosphors [66] and dosimeters [28]. The outer electronic configuration of the lanthanides is 5s 2 5p 6 4 f n 5d 1 6s 2 and many of their properties arise from the partially filled 4 f shell that populates for increasing atomic number [55].…”

Section: Lanthanidesmentioning

confidence: 99%

“…NaMgF 3 has approximate lattice parameters a = 5.36 Å, b = 5.49 Å, c = 7.67 Å and space group Pbnm [87]. KMgF 3 has approximate lattice parameter a = 3.99 Å and space group Pm 3m [62]. RbMgF 3 has approximate lattice parameters a = 5.83 Å, b = 5.83 Å, c = 14.20 Å and space group P6 3 /mmc [88].…”

Section: Fluoroperovskitesmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

Schuyt¹

View full text Add to dashboard Cite

<p>The luminescence of crystalline compounds can be used to monitor many physical phenomena, including doses of ionising radiation. Optically stimulated luminescence (OSL), thermoluminescence (TL), and radiophotoluminescence (RPL) have been successfully employed in dosimetry. However, few materials possess both the structural and luminescence properties required for medical dosimetry. This thesis aimed to investigate the luminescence features of the class of compounds known as fluoroperovskites. Emphasis was placed on studying the effects of irradiation on the luminescence properties, such that the compounds could be evaluated regarding potential applications in clinical dosimetry. Samples were primarily characterised using photoluminescence (PL), radioluminescence (RL), OSL, RPL, TL, and transmittance spectroscopy. OSL was observed in the majority of samples due to the existence of electron trapping F-type centres. F-centre/Mn complexes were observed in all AMgF3:Mn compounds after irradiation and the energy levels of the complexes in each compound were experimentally determined. The most promising potential dosimeter host material was the near tissue-equivalent NaMgF3. When doped with Mn2+, the compound exhibited RPL via the formation of F-centre/Mn complexes and OSL via several trapping centres. The RPL could be probed independently to the OSL such that the compound could function as a hybrid OSL/RPL dosimeter. In the NaMgF3:Ln compounds, RPL occurred via the radiation-induced reduction Ln3+ → Ln2+ for Ln = Sm, Dy, and Yb. The reduction Sm3+ → Sm2+ was highly stable and could be non-destructively probed independently to the OSL. The Sm doped compound also exhibited radiation-induced conductivity that could be coupled with the RL, such that the compound could function as a real-time hybrid optical/electrical dosimeter. Charge kinetics, thermal quenching, and binding energy models were developed and applied to the compounds. Finally, a two-dimensional readout system was designed and constructed. The capabilities of the system were evaluated using the OSL of NaMgF3:Eu and NaMgF3:Mn. Sensitivities to doses from < 10 mGy to > 1 Gy were obtained along with sub-millimetre spatial resolutions.</p>

show abstract

Atomistic Simulation of Structural and Mechanical Properties of the AMgF₃ (A = K, Rb, and Cs) Compounds Under Hydrostatic Pressure

Sousa

Lima

2019

J Comput Chem

View full text Add to dashboard Cite

Structural, mechanical, elastic, and dielectric properties of the AMgF3 (A = K, Rb, and Cs) compounds were investigated using classical atomistic simulation. A new set of interatomic potentials was developed for these compounds. Lattice parameters and interatomic distances have shown to accurately reproduce all structures, with very close agreement to the experimental data. In all cases, the relative error is below 0.5%. Effect of hydrostatic pressure in the structural, mechanical, elastic, and dielectric properties of these materials were studied from 0 up to 50 GPa. Compounds behavior and stability under pressure were analyzed. KMgF3 and RbMgF3 changed from brittle to ductile at approximately 2 GPa. These calculations play an important role in understanding the properties of the AMgF3 (A = K, Rb, and Cs) compounds under pressure, and open up a new opportunity to study defects in this class of materials. © 2019 Wiley Periodicals, Inc.

show abstract

Photoluminescence, radioluminescence and optically stimulated luminescence in nanoparticle and bulk KMgF3(Eu)

Cited by 23 publications

References 43 publications

Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

Atomistic Simulation of Structural and Mechanical Properties of the AMgF₃ (A = K, Rb, and Cs) Compounds Under Hydrostatic Pressure

Contact Info

Product

Resources

About

Photoluminescence, radioluminescence and optically stimulated luminescence in nanoparticle and bulk KMgF3(Eu)

Cited by 23 publications

References 43 publications

Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

Atomistic Simulation of Structural and Mechanical Properties of the AMgF3 (A = K, Rb, and Cs) Compounds Under Hydrostatic Pressure

Contact Info

Product

Resources

About

Atomistic Simulation of Structural and Mechanical Properties of the AMgF₃ (A = K, Rb, and Cs) Compounds Under Hydrostatic Pressure