Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles

Detalhes bibliográficos
Autor(a) principal: Aragón, F. F.H.
Data de Publicação: 2023
Outros Autores: Villegas-Lelovsky, L. [UNESP], Parizaka, J. G., Zela, E. G., Bendezu, R., Gallegos, R. O., Pacheco-Salazar, D. G., da Silva, S. W., Cohen, R., Nagamine, L. C.C.M., Coaquira, J. A.H., Morais, P. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1039/d3ma00053b
http://hdl.handle.net/11449/248499
Resumo: Oxide-diluted magnetic semiconductors have received considerable attention in diverse scientific and technological fields because they combine the optoelectronic properties of the hosting semiconductor with the magnetic properties of the metal dopant. In this report, the role of Fe doping on the structural, vibrational, optical, hyperfine, and magnetic properties of Fe-doped ZnO nanoparticles (Zn1−xFexO) synthesized via a polymeric precursor method is presented. Our findings display that the crystallite size decreases from ∼23 nm (x = 0.000) to ∼8 nm (x = 0.200) as the Fe-content (x) is increased. From the XRD data analysis, our results suggest an isovalent solid solution between Fe2+ and Zn2+ ions for lower Fe-content (up to 0.075) and aliovalent solution (Fe3+ and Zn2+ ions) for higher Fe-content. Elliot's theory was used to assess the band gap energy of Eg ∼ 3.4 eV, and an exciton binding energy of Eb ∼ 66 meV for the undoped sample. The excitonic peak exhibits a broadening trend with increasing Fe-content, suggesting disorder enhancement in the ZnO matrix. Besides, FTIR data analysis suggests that the Zn-O bond length increases with Fe-content up to 0.075 and decreases above this value. The intensity ratio of the O-H and Zn-O modes shows a discontinuity as the Fe-content is increased. Room temperature Mössbauer spectra carried out for samples with x = 0.050, 0.075, and 0.200 show that the isomer shift and quadrupole splitting increase with the Fe-content, in agreement with the structural properties. Magnetic measurements suggest that the iron ions stabilize as Fe2+ in samples with low Fe-content and then as Fe3+ in samples with high Fe-content. Besides, the occurrence of short-range antiferromagnetic interactions was determined, which becomes stronger as the Fe-content is increased.
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spelling Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticlesOxide-diluted magnetic semiconductors have received considerable attention in diverse scientific and technological fields because they combine the optoelectronic properties of the hosting semiconductor with the magnetic properties of the metal dopant. In this report, the role of Fe doping on the structural, vibrational, optical, hyperfine, and magnetic properties of Fe-doped ZnO nanoparticles (Zn1−xFexO) synthesized via a polymeric precursor method is presented. Our findings display that the crystallite size decreases from ∼23 nm (x = 0.000) to ∼8 nm (x = 0.200) as the Fe-content (x) is increased. From the XRD data analysis, our results suggest an isovalent solid solution between Fe2+ and Zn2+ ions for lower Fe-content (up to 0.075) and aliovalent solution (Fe3+ and Zn2+ ions) for higher Fe-content. Elliot's theory was used to assess the band gap energy of Eg ∼ 3.4 eV, and an exciton binding energy of Eb ∼ 66 meV for the undoped sample. The excitonic peak exhibits a broadening trend with increasing Fe-content, suggesting disorder enhancement in the ZnO matrix. Besides, FTIR data analysis suggests that the Zn-O bond length increases with Fe-content up to 0.075 and decreases above this value. The intensity ratio of the O-H and Zn-O modes shows a discontinuity as the Fe-content is increased. Room temperature Mössbauer spectra carried out for samples with x = 0.050, 0.075, and 0.200 show that the isomer shift and quadrupole splitting increase with the Fe-content, in agreement with the structural properties. Magnetic measurements suggest that the iron ions stabilize as Fe2+ in samples with low Fe-content and then as Fe3+ in samples with high Fe-content. Besides, the occurrence of short-range antiferromagnetic interactions was determined, which becomes stronger as the Fe-content is increased.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Universidad Nacional de San Agustín de Arequipa Av Independencia SNUniversity of Brasília Institute of PhysicsDepartamento de Física Centro de Ciências Exatas e de Tecnologia Universidade Federal de São Carlos, SPInstituto de Física Universidade de São Paulo, SPCatholic University of Brasília Genomic Sciences and Biotechnology, DFPhysics Department IGCE Paulista State University, CEP 13506-900, SPPhysics Department IGCE Paulista State University, CEP 13506-900, SPAv Independencia SNInstitute of PhysicsUniversidade Federal de São Carlos (UFSCar)Universidade de São Paulo (USP)Genomic Sciences and BiotechnologyUniversidade Estadual Paulista (UNESP)Aragón, F. F.H.Villegas-Lelovsky, L. [UNESP]Parizaka, J. G.Zela, E. G.Bendezu, R.Gallegos, R. O.Pacheco-Salazar, D. G.da Silva, S. W.Cohen, R.Nagamine, L. C.C.M.Coaquira, J. A.H.Morais, P. C.2023-07-29T13:45:44Z2023-07-29T13:45:44Z2023-02-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1389-1402http://dx.doi.org/10.1039/d3ma00053bMaterials Advances, v. 4, n. 5, p. 1389-1402, 2023.2633-5409http://hdl.handle.net/11449/24849910.1039/d3ma00053b2-s2.0-85149815545Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Advancesinfo:eu-repo/semantics/openAccess2023-07-29T13:45:44Zoai:repositorio.unesp.br:11449/248499Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:14:23.958905Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
title Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
spellingShingle Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
Aragón, F. F.H.
title_short Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
title_full Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
title_fullStr Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
title_full_unstemmed Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
title_sort Evidence of progressive Fe2+ to Fe3+oxidation in Fe2+-doped ZnO nanoparticles
author Aragón, F. F.H.
author_facet Aragón, F. F.H.
Villegas-Lelovsky, L. [UNESP]
Parizaka, J. G.
Zela, E. G.
Bendezu, R.
Gallegos, R. O.
Pacheco-Salazar, D. G.
da Silva, S. W.
Cohen, R.
Nagamine, L. C.C.M.
Coaquira, J. A.H.
Morais, P. C.
author_role author
author2 Villegas-Lelovsky, L. [UNESP]
Parizaka, J. G.
Zela, E. G.
Bendezu, R.
Gallegos, R. O.
Pacheco-Salazar, D. G.
da Silva, S. W.
Cohen, R.
Nagamine, L. C.C.M.
Coaquira, J. A.H.
Morais, P. C.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Av Independencia SN
Institute of Physics
Universidade Federal de São Carlos (UFSCar)
Universidade de São Paulo (USP)
Genomic Sciences and Biotechnology
Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Aragón, F. F.H.
Villegas-Lelovsky, L. [UNESP]
Parizaka, J. G.
Zela, E. G.
Bendezu, R.
Gallegos, R. O.
Pacheco-Salazar, D. G.
da Silva, S. W.
Cohen, R.
Nagamine, L. C.C.M.
Coaquira, J. A.H.
Morais, P. C.
description Oxide-diluted magnetic semiconductors have received considerable attention in diverse scientific and technological fields because they combine the optoelectronic properties of the hosting semiconductor with the magnetic properties of the metal dopant. In this report, the role of Fe doping on the structural, vibrational, optical, hyperfine, and magnetic properties of Fe-doped ZnO nanoparticles (Zn1−xFexO) synthesized via a polymeric precursor method is presented. Our findings display that the crystallite size decreases from ∼23 nm (x = 0.000) to ∼8 nm (x = 0.200) as the Fe-content (x) is increased. From the XRD data analysis, our results suggest an isovalent solid solution between Fe2+ and Zn2+ ions for lower Fe-content (up to 0.075) and aliovalent solution (Fe3+ and Zn2+ ions) for higher Fe-content. Elliot's theory was used to assess the band gap energy of Eg ∼ 3.4 eV, and an exciton binding energy of Eb ∼ 66 meV for the undoped sample. The excitonic peak exhibits a broadening trend with increasing Fe-content, suggesting disorder enhancement in the ZnO matrix. Besides, FTIR data analysis suggests that the Zn-O bond length increases with Fe-content up to 0.075 and decreases above this value. The intensity ratio of the O-H and Zn-O modes shows a discontinuity as the Fe-content is increased. Room temperature Mössbauer spectra carried out for samples with x = 0.050, 0.075, and 0.200 show that the isomer shift and quadrupole splitting increase with the Fe-content, in agreement with the structural properties. Magnetic measurements suggest that the iron ions stabilize as Fe2+ in samples with low Fe-content and then as Fe3+ in samples with high Fe-content. Besides, the occurrence of short-range antiferromagnetic interactions was determined, which becomes stronger as the Fe-content is increased.
publishDate 2023
dc.date.none.fl_str_mv 2023-07-29T13:45:44Z
2023-07-29T13:45:44Z
2023-02-08
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1039/d3ma00053b
Materials Advances, v. 4, n. 5, p. 1389-1402, 2023.
2633-5409
http://hdl.handle.net/11449/248499
10.1039/d3ma00053b
2-s2.0-85149815545
url http://dx.doi.org/10.1039/d3ma00053b
http://hdl.handle.net/11449/248499
identifier_str_mv Materials Advances, v. 4, n. 5, p. 1389-1402, 2023.
2633-5409
10.1039/d3ma00053b
2-s2.0-85149815545
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials Advances
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1389-1402
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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