αsingle bondAg2WO4 under microwave, electron beam and femtosecond laser irradiations: Unveiling the relationship between morphology and photoluminescence emissions
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comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Title
αsingle bondAg2WO4 under microwave, electron beam and femtosecond laser irradiations: Unveiling the relationship between morphology and photoluminescence emissionsAuthor (s)
Date
2022-01-29Publisher
ElsevierISSN
0925-8388Bibliographic citation
TEIXEIRA, Mayara Mondego, et al. αAg2WO4 under microwave, electron beam and femtosecond laser irradiations: Unveiling the relationship between morphology and photoluminescence emissions. Journal of Alloys and Compounds, 2022, p. 163840.Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
In this study, the α-Ag2WO4 samples were successfully synthesized combined two methods, co-precipitation and microwave-assisted hydrothermal. Later, two different irradiation processes: electron beam and femtosecond ... [+]
In this study, the α-Ag2WO4 samples were successfully synthesized combined two methods, co-precipitation and microwave-assisted hydrothermal. Later, two different irradiation processes: electron beam and femtosecond laser are applied. Unit cell changes were shown by X-ray measurements and Rietveld analysis and compared with the results obtained for first-principle calculations. The formation of oxygen vacancies on the surface of the particles after the irradiation process was revealed by XPS measurements. Electron beam and femtosecond laser irradiations were found to cause expansion of the unit cell, form oxygen vacancies on the surface, change the angle and distance between Osingle bondAg and Osingle bondW bonds, and modify the particle morphology to rod-, cube- and sphere-like. The XANES measurements confirm that the local order of the W atoms is maintained along the different irradiation processes. Based on the theoretical analysis of surfaces investigation and Wulff construction, the contribution of (010) and (101) surfaces at the emission centers in 550 and 733 nm associated with the PL spectrum of α–Ag2WO4, was established. [-]
Is part of
Journal of Alloys and Compounds. Volume 903, 15 May 2022, 163840.Funder Name
Brazilian research financing institution | Conselho Nacional de Desenvolvimento Científico e Tecnológico - (CNPq) Brazil | Fundação de Amparo à Pesquisa do Estado de São Paulo - (FAPESP) Brazil | Universitat Jaume I | Ministerio de Ciencia, Innovación y Universidades (Spain) | LNLS
Project code
001 | CDMF, Proc.2013/07296–2 | UJI-B2019-30 | GC2018- 094417-B-I00 | XAFS2–20180338
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0925-8388/© 2022 Elsevier B.V. All rights reserved.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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