Role of crystallinity on the optical properties of Na2V6O16·3H2O nanowires

Página do item simplificado
dc.creatorAvansi Junior, Waldir
dc.creatorMaia, Lauro June Queiroz
dc.creatorMourão, H. A. J. L.
dc.creatorRibeiro, C.
dc.date.accessioned2024-02-15T14:37:56Z
dc.date.available2024-02-15T14:37:56Z
dc.date.issued2018
dc.description.abstractIt is known that optical properties depend on crystalline structures, feature that can significantly affect materials such as vanadates, since their lamellar structures tend to be irregular. Synthetic methods, such as hydrothermal annealing, may enhance the understanding of the dependence, once fine crystallization control is possible. Consequently, a monoclinic phase of Na2V6O16·3H2O 1D-nanostructures as nanowires has been obtained by decomposition of vanadium peroxide in hydrothermal conditions. X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS) and high-resolution transmission electron microscopy (HRTEM) were employed to characterize the structure, local-order structure and morphology of the as-obtained samples. The optical and electronic properties of the samples were studied by photoluminescence (PL), UV–Visible diffuse reflectance (DRS) and electron paramagnetic resonance (EPR) spectroscopies. The nanostructures present a single crystalline nature and emit intense light at room temperature from 2.4 eV to 3.2 eV, i.e., from 520 nm to 390 nm, which is related to the crystalline nature of the samples. As the synthesis temperature increased, structural defects (V4+ centers) were reduced, and monocrystalline materials with improved PL from ultraviolet to green light emission could be obtained.
dc.identifier.citationAVANSI, W et al. Role of crystallinity on the optical properties of Na2V6O16·3H2O nanowires. Journal of Alloys and Compounds, Amsterdam, v. 731, p. 1119-1124, 2018. DOI: 10.1016/j.jallcom.2017.10.121. Disponível em: https://www.sciencedirect.com/science/article/pii/S0925838817335570. Acesso em: 7 jan. 2024.
dc.identifier.doi10.1016/j.jallcom.2017.10.121
dc.identifier.issne- 1873-4669
dc.identifier.issn0925-8388
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0925838817335570
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectNa2V6O16·3H2O
dc.subject1D-nanostructures
dc.subjectXANES spectroscopy
dc.subjectPhotoluminescence spectroscopy
dc.titleRole of crystallinity on the optical properties of Na2V6O16·3H2O nanowires
dc.typeArtigo

Arquivos

Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

IF - Artigos publicados em periódicos