Photoluminescence and thermal stability of Tb3+-doped Gd2O3 nanoparticles embedded in SiO2 host matrix

Rocha, Leonardo A.; Siqueira, Renato Luiz; Esbenshade, Jennifer; Schiavon, Marco A.; Ferrari, Jefferson Luis

doi:10.1016/j.jallcom.2017.10.084

Cited by 13 publications

(4 citation statements)

References 38 publications

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“…[25] Li + ion radius was much smaller than La 3 + ion radius, if the Li + ion substituted the La 3 + site in La 2 O 3 lattice, the interplanar spacing would be smaller and the θ would be larger, and vice versa. The full width half maximum (FWHM) can measure the crystallinity of the sample, the corrected FWHM β C can be calculated by the following equation: [32] (2)…”

Section: Resultsmentioning

confidence: 99%

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Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La₂O₃: Yb³⁺/Er³⁺ Nanoparticles Induced via Tri‐Doping Li⁺ Ions

Lin

Wang

et al. 2021

ChemistrySelect

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Due to the lower up-conversion (UC) luminescence intensity and efficiency, up-conversion nanoparticles (UCNPs) still have many obstacles when they are applied, especially in biology. In this paper, La 2 O 3 : Yb 3 + /Er 3 + /Li + nanoparticles were prepared by hydrothermal method firstly and were tested by multiple methods. The green emission and red emission of La 2 O 3 : Yb 3 + / Er 3 + /Li + (7/1/10 mol%) nanoparticles were enhanced 63 and 56 folds respectively than the Li + -free counterpart under 980 nm excitation. The reason for the UC luminescence enhancement has been investigated in detail, which can be illustrated by the increase of the crystallinity of La 2 O 3 , the increase of the local asymmetry near the Er 3 + ions, the increase of the surface charge, and the decrease of the quenching centers by doping Li + ions. Additionally, the possible mechanisms of UC luminescence and UC enhancement were discussed briefly. The absolute sensitivity S A of La 2 O 3 : Yb 3 + /Er 3 + /Li + (7/1/10 mol%) with temperature from 303 K to 543 K was 1561.58/T 2 , which indicated the material was an excellent candidate for temperature detection.

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Section: Resultsmentioning

confidence: 99%

“…The full width half maximum (FWHM) can measure the crystallinity of the sample, the corrected FWHM β C can be calculated by the following equation: [32] …”

Section: Resultsmentioning

confidence: 99%

Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La₂O₃: Yb³⁺/Er³⁺ Nanoparticles Induced via Tri‐Doping Li⁺ Ions

Lin

Wang

et al. 2021

ChemistrySelect

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“…For example, sphere-like particles have the potential for applications such as optical or photonic crystals, medical delivery, and novel functional devices [7][8][9]. Similarly, nanorods and nanotubes usually exhibit high magnetic coercivity [10][11][12][13], which is essential for high-density magnetic storage. Nanoplates are sensitive to their alignment and morphology, which affect the anisotropic properties.…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric properties of shape-dependent nanostructured Gd₂O₃ oxide particles

Neupane¹,

Casey²,

Sultana³

et al. 2023

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Single-phase Gd2O3 nanostructures with different morphologies, such as nanoparticles, nanorods, nanospheres, and nanoplates, were synthesised. Gd2O3 1D nanorods and 2D nanoplate architectures were prepared via the hydrothermal method, while 3D hollow nanospheres were synthesised via homogeneous precipitation. The magnetic and magnetocaloric properties of Gd2O3 nanostructured particles were studied as functions of temperature and field. The material demonstrated typical paramagnetic behaviour in the measured temperature range of 3–300 K. The magnetic entropy change (−ΔS M ) was determined from the magnetic isotherms measured in the 3–38 K temperature range in the field up to 5 T. The maximum change in magnetic entropy Δ S M max value 11.2 J kg−1 K−1 for the nanoplate, 9.4 J kg−1 K−1 for the nanorod, 9.2 J kg−1 K−1 for the nanosphere, and 10.7 J kg−1 K−1 for the nanoparticle sample was observed at temperature 5 K for the magnetic field of 5 T. Owing to large Δ S M max , these Gd2O3 nanostructured particles would be considered promising materials for magnetic refrigeration at cryogenic temperatures.

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“…Nos espectros da Figura 20 e Figura 21 observa-se que a transição 5 D0 → 7 F0 apresenta duas bandas, 581,00 e 587,00 originadas pela ocupação do íon Eu 3+ nos sítios C2 e S6, respectivamente. A alta intensidade da transição 5 D0 → 7 F2 e o aparecimento das finas bandas entre 570,00 e 700,00 nm associadas às transições 5 D0 → 7 FJ (J: 0 -4) observados nos espectros indicam que o íon Eu 3+ se encontra em um sítio de simetria sem centro de inversão e no mesmo ambiente químico para todas os materiais 77,147,175 .…”

Section: Espectros De Emissãounclassified

Avaliação das propriedades fotônicas do material fotoluminescente à base de SiO2 e Gd2O3 triplamente-dopado com Er3+/Yb3+/Eu3+ para conversão de energia

Rezende¹

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Agradeço à Deus por ser quem Ele é e por me fazer ser quem eu sou. Agradeço infinitamente porque Seu amor é incondicional e Sua misericórdia dura para sempre.Agradeço ao meu marido Bruno por tanto apoio, infinitos incentivos, por não me deixar desistir e principalmente por acreditar tanto em mim.Aos meus pais Bil e Aurea, e toda a família por me apoiarem em tudo que eu tenho feito. Ao meu orientador Jefferson Luis Ferrari pela paciência inesgotável e dedicação como orientador. Sou eternamente grata por acreditar em mim, por tantos ensinamentos e oportunidades. Você é uma grande inspiração e exemplo de profissional e ser humano.Agradeço também aos professores e colaboradores

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Photoluminescence and thermal stability of Tb3+-doped Gd2O3 nanoparticles embedded in SiO2 host matrix

Cited by 13 publications

References 38 publications

Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La₂O₃: Yb³⁺/Er³⁺ Nanoparticles Induced via Tri‐Doping Li⁺ Ions

Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La₂O₃: Yb³⁺/Er³⁺ Nanoparticles Induced via Tri‐Doping Li⁺ Ions

Magnetocaloric properties of shape-dependent nanostructured Gd₂O₃ oxide particles

Avaliação das propriedades fotônicas do material fotoluminescente à base de SiO2 e Gd2O3 triplamente-dopado com Er3+/Yb3+/Eu3+ para conversão de energia

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Photoluminescence and thermal stability of Tb3+-doped Gd2O3 nanoparticles embedded in SiO2 host matrix

Cited by 13 publications

References 38 publications

Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La2O3: Yb3+/Er3+ Nanoparticles Induced via Tri‐Doping Li+ Ions

Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La2O3: Yb3+/Er3+ Nanoparticles Induced via Tri‐Doping Li+ Ions

Magnetocaloric properties of shape-dependent nanostructured Gd2O3 oxide particles

Avaliação das propriedades fotônicas do material fotoluminescente à base de SiO2 e Gd2O3 triplamente-dopado com Er3+/Yb3+/Eu3+ para conversão de energia

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Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La₂O₃: Yb³⁺/Er³⁺ Nanoparticles Induced via Tri‐Doping Li⁺ Ions

Up‐Conversion Luminescence Enhancement and Temperature Sensitivity Properties of La₂O₃: Yb³⁺/Er³⁺ Nanoparticles Induced via Tri‐Doping Li⁺ Ions

Magnetocaloric properties of shape-dependent nanostructured Gd₂O₃ oxide particles