Synthesis, spectroscopic and luminescence properties of Ga–doped γ–Al2O3

Бакланова, И. В.; Красильников, В. Н.; Tyutyunnik, А. P.; Enyashin, Andrey N.; Baklanova, Yana V.; Гырдасова, О. И.; Samigullina, R. F.; Вовкотруб, Э. Г.

doi:10.1016/j.saa.2019.117658

Cited by 11 publications

(8 citation statements)

References 45 publications

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“…Thus, Al 3+ and Si 4+ are replaced by Ga 3+ , Bi 3+ , In 3+ , Sn 2+ , or Sn 4+ . There are many excess cations and various defects in the doping region . When the Al 2 O 3 matrix is doped, the excess cations and anion vacancies produced are equivalent to a positron center, attracting the surrounding electrons to form an F color center .…”

Section: Resultsmentioning

confidence: 99%

“…There are many excess cations and various defects in the doping region. 41 When the Al 2 O 3 matrix is doped, the excess cations and anion vacancies produced are equivalent to a positron center, attracting the surrounding electrons to form an F color center. 42 The oxygen-vacancy F color center binds an electron to form the F + color center, and a defect energy is formed within the band gap.…”

Section: Resultsmentioning

confidence: 99%

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Unique and Excellent Paintable Liquid Metal for Fluorescent Displays

Duan

Zhao

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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A liquid metal (LM) generally has excellent electrical conductivity, thermal conductivity, flexibility, fluidity, and reflectivity. Innovative electronics using a LM to paint colorful fluorescent patterns may be applied to many important fields. Herein we propose, for the first time, the use of a LM to paint fluorescent patterns in the field of natural science. An LM containing a main-group metal (Ga50.25Bi8.28In28.2Sn13.27) is used to paint a uniform alloy film on a ceramic substrate. The painting is not restricted by any curved surface, shape, or size, which therefore gives the LM diverse adaptability. We have adopted the strategy of “painting–annealing–dealloying” through which LM can easily be diffused and doped into the substrate to produce various defects. Defects, my themselves or through their interactions, can produce different colors of emitted light. The primary fluorescence colors, such as purple, yellow, blue, and white, have been painted with the LM. Importantly, the brightness and color coordinates can be adjusted by changing the LM composition or annealing temperature, and intricate, delicate, colorful fluorescence patterns can be produced. Due to the unique painting form, colorful fluorescence, high stability, corrosion resistance, and low cost of the technique used for the LM, it can be used for displays, lighting panels, flexible electronic circuits, anticounterfeiting devices, and sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Unique and Excellent Paintable Liquid Metal for Fluorescent Displays

Duan

Zhao

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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show abstract

“…The gamma crystallographic modification of Al 2 O 3 (g-Al 2 O 3 , cubic symmetry) was also theoretically studied for the doping of 13 trivalent elements (Cr, Ga, Fe, Lu, Yb, Er, Y, Tb, Gd, Eu, Sm, Nd, and La) 44 and various transition metal ions (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) 45 as well as Ce 46 and Ga. 47 The most comprehensive study of the mentioned ones is the study of Maglia et al 44 The calculations have been carried out using Al 64 O 96 defect spinel supercells containing 8 aluminium vacancies. They found out that the lowest energy configurations correspond to a random distribution of tetrahedral and octahedral vacancies.…”

Section: Erbium In Photonic Crystalsmentioning

confidence: 99%

Erbium ion implantation into LiNbO₃, Al₂O₃, ZnO and diamond – measurement and modelling – an overview

Cajzl

Nekvindová

Macková

et al. 2022

Phys. Chem. Chem. Phys.

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“…However, in our opinion, structural instability of imogolitelike nanotubes with 100% isomorphic substitution of Al does not preclude an existence of imogolite nanotubes doped by a small amount of foreign elements, when imogolite skeleton is capable to withstand a local distortion on Al sublattice. Remarkably, in contrast to the attempts to dope alumina or complex aluminohydroxides, [44][45][46] the doping of imogolite by various metal cations remains widely abandoned in both experiment and theory. Indeed, the Al 3þ cation has the smallest size among trivalent metal cations.…”

Section: Numerous Studies Determining Peculiarities Of Atommentioning

confidence: 99%

Imogolite: Curvature‐Induced Hospitality for Trivalent Dopants

Popov

Enyashin

2021

Physica Status Solidi (b)

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Imogolite—a congregation of aluminosilicate nanotubes—has shown a great promise for fabrication of advanced materials. Imogolite nanotubes hold the record narrow diameters distribution and demonstrate one of the highest curvatures among noncarbon nanotubes. Current experimental and theoretical prospects for their modification are related mostly to surface functionalization or to progressive Si substitution on Ge, whereas a doping of Al sublattice is steadily neglected. The empirical rules of Hume–Rothery disallow such doping due to a large size mismatch between Al3+ and the majority of metal cations. Using the quantum‐chemical calculations, herein, the difference in coordination environment is unveiled for 12 sorts of trivalent cations at octahedral Al sites in both a highly curved imogolite layer and the flat gibbsite layer. The curvature of natural imogolite acts provoking for violation of the Hume–Rothery rules, sterically promoting the doping of Al sublattice by cations with radii 1.0–1.2 Å typical for rare‐earth elements. Theoretically, the synthesis of a metal‐doped imogolite is restricted only by the overlap of the phase stability fields for precursor reactants or by kinetic factors. This study might be inciting for the synthesis of chemically modified imogolite and related Ge‐imogolites.

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Synthesis, spectroscopic and luminescence properties of Ga–doped γ–Al2O3

Cited by 11 publications

References 45 publications

Unique and Excellent Paintable Liquid Metal for Fluorescent Displays

Unique and Excellent Paintable Liquid Metal for Fluorescent Displays

Erbium ion implantation into LiNbO₃, Al₂O₃, ZnO and diamond – measurement and modelling – an overview

Imogolite: Curvature‐Induced Hospitality for Trivalent Dopants

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Synthesis, spectroscopic and luminescence properties of Ga–doped γ–Al2O3

Cited by 11 publications

References 45 publications

Unique and Excellent Paintable Liquid Metal for Fluorescent Displays

Unique and Excellent Paintable Liquid Metal for Fluorescent Displays

Erbium ion implantation into LiNbO3, Al2O3, ZnO and diamond – measurement and modelling – an overview

Imogolite: Curvature‐Induced Hospitality for Trivalent Dopants

Contact Info

Product

Resources

About

Erbium ion implantation into LiNbO₃, Al₂O₃, ZnO and diamond – measurement and modelling – an overview