Artículo
Aging effect on vanadium oxide hybrid nanotubes
Saleta, Martin Eduardo
; Tobia, Dina
; Figueroa, Santiago Jose Alejandro
; Lopez, Carlos Alberto
; Granada, Mara
; Sánchez, Rodolfo D.; Malta, Marcos; Torresi, Roberto M.
Fecha de publicación:
09/2019
Editorial:
IOP Publishing
Revista:
Journal of Physics: Condensed Matter
ISSN:
0953-8984
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Vanadium oxides present a rich magnetic phase diagram depending on the oxidation state of the V ions. In particular the vanadium oxide nanotubes (VO x NTs) present several promising perspectives for different technological applications for which it is essential to know the oxidation state of V ions, as well as to evaluate the stability with the aging time of the tubes. In this work we present a systematic study of the time evolution of the magnetic properties of VO x NTs. For this complete characterization, we used electron spin resonance (ESR) and dc-susceptibility techniques, which were supplemented with TEM microscopy and XANES. We observed that for aging in normal environmental conditions of pressure, temperature and humidity, the V 4+ ions oxidize to V 5+ . Although the multiwall tubular structure is maintained, this oxidation process produces a marked change in the magnetic properties. We conclude that the aging of the samples affects the V 4+ /V 5+ relationship in the VO x NTs, which may contribute to explain the significant dispersion of data reported in the bibliography.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos (UE-INN - NODO BARILOCHE)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Citación
Saleta, Martin Eduardo; Tobia, Dina; Figueroa, Santiago Jose Alejandro; Lopez, Carlos Alberto; Granada, Mara; et al.; Aging effect on vanadium oxide hybrid nanotubes; IOP Publishing; Journal of Physics: Condensed Matter; 31; 50; 9-2019; 1-9
Compartir
Altmétricas