Characterization of glasses based on basicity

Nanba, Tokuro

doi:10.2109/jcersj2.119.720

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…38,39,40 Compared to oxygen, the high electronegativity of fluorine resulted in a weak reductant environment, slowing the Ag + reduction and hindering the cluster formation before laser irradiation. 41,42,43 This was supported by the PL enhancement of Ag + ions from PF5 to PF25 (Fig S6) 44 . As for alumina, in PF5, most of Al modified the network interspace as of AlO5 (Al begins with a multiphoton absorption process (approximately four-photon), exciting electrons from the valence band into the conduction band.…”

Section: Glassmentioning

confidence: 67%

Unlocking the High Photosensitivity Direct Laser Writing: Designing Structures and Observing Atomic Clustering in Glass

Qiao,

Zheng,

Wang

et al. 2023

Preprint

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The direct laser writing (DLW) of photoluminescent metal clusters is inspiring intensive research in functional glasses. However, the impact of the host structure on cluster formation and visualization of DLW-induced clusters at the atomic scale remains challenging. In this work, we developed a highly photosensitive fluorophosphate glass matrix through fluorine incorporation. The addition of fluorine established a conducive environment for Ag+ ions before DLW and enhanced the availability of reducing agents and diffusion pathways during DLW. These advantages facilitate the formation of Ag quantum clusters (Ag QCs) dots under low-energy single-pulsed DLW. Increasing laser energy resulted in a combination of Ag QCs and glasses defect, forming a dot + ring photoluminescent pattern. To directly visualize the Ag QCs, we employed atom probe tomography (APT), a technique capable of mapping the spatial distribution and quantifying the number of Ag QCs. APT results demonstrated that DLW effectively halves the distance between adjacent Ag+ ions, leading to a significant increase in the abundance of Ag QCs with various aggregations, as well as a 31-fold increase in cluster density. The design concept and characterization enrich our understanding of Ag QCs behavior in glasses. This new knowledge opens up possibilities for the rational design of clusters confined in glasses and inspires their directed synthesis and various applications.

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Section: Glassmentioning

confidence: 67%

Unlocking the High Photosensitivity Direct Laser Writing: Designing Structures and Observing Atomic Clustering in Glass

Qiao,

Zheng,

Wang

et al. 2023

Preprint

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“…Optical basicity is defined as an electron donating ability of a material. The glass materials containing oxide ions with high electron density is regarded to be in high basicity [29]. The theoretical calculation of optical basicity, ʌ th for different type of component glasses can be identified based on the following expression:…”

Section: Optical Basicitymentioning

confidence: 99%

Polarizability of erbium-doped zinc-tellurite glasses coated with graphene oxide for telecommunication devices

Azlina¹,

Azlan²,

Shaari³

et al. 2021

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Graphene-based nanomaterials offer superior properties especially in optical performance. The existence of oxygen functionalized group in graphene active layers is beneficial to enhance the optical properties of current tellurite glass. In this work, two series of glasses denoted as ZBTEr (uncoated) and ZBTEr-GO (coated) were successfully prepared using melt-quenching and low-cost spray coating techniques. X-ray diffraction analysis was done on both glass series and confirmed the amorphous structural arrangement in the glass system. Morphological study was investigated by using Scanning Electron Microscopy (SEM) and revealed the distribution of graphene layers on the glass surface. The UV-Vis spectroscopy was carried out and several absorption bands were determined for both series of glasses. The computation of oxide ion polarizability and optical basicity were investigated based on Lorentz-Lorentz equation. The oxide ion polarizability and optical basicity for ZBTEr-GO (coated) glasses were found higher than ZBTEr (uncoated) glasses due to the existence of sp 2 graphitic attached on the oxygenic functional groups in GO layers. The metallization criterion values for ZBTEr-GO (coated) glasses were found decreased and tend to be more metallic. Hence, the deposition of graphene layers on the tellurite glasses offer a new strategy to improve the current telecommunication devices.

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Factors Affecting Microscopic Basicity of Silicate Glasses from the Perspective of O1s Binding Energy

Tsuji,

Hotta,

Watanabe

et al. 2023

steel research int.

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The factor affecting the microscopic basicity of oxygen in the SiOSi bond are investigated on the basis of the O1s binding energy measured by X‐ray photoelectron spectroscopy (XPS). The samples used are SiO2, Na2OSiO2, CaOSiO2, CaOMgOSiO2, and CaOAl2O3SiO2. For analysis on clean surfaces, samples are finally prepared by fracturing in a vacuum in an XPS system. From the O1s spectra, derived are the centers of gravity of the O1s spectra and the binding energies of O1s in the SiOSi, SiOAl, AlOAl, SiONa, SiOCa, and SiOMg bonds. A good linear relationship is found between the center of gravity of the O1s spectra and the optical basicity, suggesting that the center of gravity of the O1s spectra is a reasonable basicity index of silicate glasses used in this work. It is also found that there is a linear relationship between the binding energy of O1s in the SiOSi bond and the optical basicity, irrespective of the glass systems. This indicates that the experimental microscopic basicity of oxygen in SiOSi bond is affected not only by the first neighboring ions of oxygen but also by the composition of the sample.

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Characterization of glasses based on basicity

Cited by 7 publications

References 18 publications

Unlocking the High Photosensitivity Direct Laser Writing: Designing Structures and Observing Atomic Clustering in Glass

Unlocking the High Photosensitivity Direct Laser Writing: Designing Structures and Observing Atomic Clustering in Glass

Polarizability of erbium-doped zinc-tellurite glasses coated with graphene oxide for telecommunication devices

Factors Affecting Microscopic Basicity of Silicate Glasses from the Perspective of O1s Binding Energy

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