dor_id: 41636

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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

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336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

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351.#.#.b: Revista Mexicana de Física

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

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856.4.0.u: https://rmf.smf.mx/ojs/rmf/article/view/3780/3747

100.1.#.a: Londoño Calderón, C. L.; Vargas Hernández, C.; Jurado, J.

524.#.#.a: Londoño Calderón, C. L., et al. (2010). Desorption influence of water on structural, electrical properties and molecular order of vanadium pentoxide xerogel films. Revista Mexicana de Física; Vol 56, No 5: 411-0. Recuperado de https://repositorio.unam.mx/contenidos/41636

245.1.0.a: Desorption influence of water on structural, electrical properties and molecular order of vanadium pentoxide xerogel films

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2010

264.#.1.c: 2010-01-01

653.#.#.a: VO xerogel; XRD; electrical conductivity; -Raman

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, fecha de asignación de la licencia 2010-01-01, para un uso diferente consultar al responsable jurídico del repositorio por medio de rmf@ciencias.unam.mx

884.#.#.k: https://rmf.smf.mx/ojs/rmf/article/view/3780

001.#.#.#: oai:ojs.rmf.smf.mx:article/3780

041.#.7.h: eng

520.3.#.a: Vanadium pentoxide xerogel films were grown by sol-gel method on pre-treated glass substrates, the gelation time was 14 days. The crystallinity of the films was analyzed with X-ray diffraction (XRD), identifying the composite V2O5\cdotnH2O before, and both vanadium pentoxide xerogel and \α-V2O5 phases after, being subjected to thermal treatment (47, 97, 147, 204, 237, 272, 297 and 330\∘ C during 15simminutes in each isotherm). The termal treatment reduces the degree of hydrations gel (n) from 2.1 to 1.4, besides the secondary phase (\α-V2O5) has lattice parameters very similar to the precursor powder (which deviate about 0.3 % ). The electrical conductivity presents a semiconductor behavior in agreement with small polaron model, thermally activated and irreversible. The activation energies for three consecutive cycles were studied and analyzed: a strong dependency between the degree of hidratation's gel n with activation energy for high and low temperature regions was found. \μ-Raman Spectroscopy showed the influence of temperature in the vanadium pentoxide gel film, presenting a phase transition from crystalline-amorphous for temperatures above 272\∘ C and inferring that the water presence in the sample is responsible in some way for the crystallinity of the material.

773.1.#.t: Revista Mexicana de Física; Vol 56, No 5 (2010): 411-0

773.1.#.o: https://rmf.smf.mx/ojs/rmf/index

046.#.#.j: 2020-11-25 00:00:00.000000

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310.#.#.a: Bimestral

264.#.1.b: Sociedad Mexicana de Física, A.C.

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handle: 0599d3dbb3108f24

harvesting_date: 2020-09-23 00:00:00.0

856.#.0.q: application/pdf

last_modified: 2020-11-27 00:00:00

license_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es

license_type: by-nc-nd

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Artículo

Desorption influence of water on structural, electrical properties and molecular order of vanadium pentoxide xerogel films

Londoño Calderón, C. L.; Vargas Hernández, C.; Jurado, J.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Londoño Calderón, C. L., et al. (2010). Desorption influence of water on structural, electrical properties and molecular order of vanadium pentoxide xerogel films. Revista Mexicana de Física; Vol 56, No 5: 411-0. Recuperado de https://repositorio.unam.mx/contenidos/41636

Descripción del recurso

Autor(es)
Londoño Calderón, C. L.; Vargas Hernández, C.; Jurado, J.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Desorption influence of water on structural, electrical properties and molecular order of vanadium pentoxide xerogel films
Fecha
2010-01-01
Resumen
Vanadium pentoxide xerogel films were grown by sol-gel method on pre-treated glass substrates, the gelation time was 14 days. The crystallinity of the films was analyzed with X-ray diffraction (XRD), identifying the composite V2O5\cdotnH2O before, and both vanadium pentoxide xerogel and \α-V2O5 phases after, being subjected to thermal treatment (47, 97, 147, 204, 237, 272, 297 and 330\∘ C during 15simminutes in each isotherm). The termal treatment reduces the degree of hydrations gel (n) from 2.1 to 1.4, besides the secondary phase (\α-V2O5) has lattice parameters very similar to the precursor powder (which deviate about 0.3 % ). The electrical conductivity presents a semiconductor behavior in agreement with small polaron model, thermally activated and irreversible. The activation energies for three consecutive cycles were studied and analyzed: a strong dependency between the degree of hidratation's gel n with activation energy for high and low temperature regions was found. \μ-Raman Spectroscopy showed the influence of temperature in the vanadium pentoxide gel film, presenting a phase transition from crystalline-amorphous for temperatures above 272\∘ C and inferring that the water presence in the sample is responsible in some way for the crystallinity of the material.
Tema
VO xerogel; XRD; electrical conductivity; -Raman
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

Enlaces