dor_id: 41550

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856.4.0.u: http://revistas.unam.mx/index.php/rmf/article/view/15073/14331

100.1.#.a: Avila-garcía, A.; García-hipólito, M.; Matsumoto-kuwabara, Y.

524.#.#.a: Avila-garcía, A., et al. (2009). Ac response to humidity and propane of sprayed Fe-Zn oxide films. Revista Mexicana de Física; Vol 55, No 004. Recuperado de https://repositorio.unam.mx/contenidos/41550

245.1.0.a: Ac response to humidity and propane of sprayed Fe-Zn oxide films

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

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2009

264.#.1.c: 2009-01-01

653.#.#.a: Iron-zinc oxide films; ultrasonic spray pyrolysis; AC measurements; humidity and propane sensors

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 2009-01-01, para un uso diferente consultar al responsable jurídico del repositorio por medio de rmf@ciencias.unam.mx

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041.#.7.h: eng

520.3.#.a: Iron-zinc oxide films with different Zn contents were ultrasonically sprayed on glass substrates and inter-digital gold electrodes were evap- orated on them. Films were deposited from solutions containing 2, 10 and 30 at.% Zn. Hematite, amorphous and Franklinite structuresresulted, respectively. They were assessed as humidity and propane detectors under alternating-current conditions for frequencies from 1 to 105 Hz and two temperatures: 30 and 250◦C. Their impedances in dry air, humid air and humid air plus propane were determined from voltage measurements with a Lock-In amplifier. Sensitivity values to both humidity (53% RH.) and 189, 500 and 786 ppm of propane from the response of the real and imaginary parts of the impedance and also the total impedance were determined as functions of frequency. Maximum sensitivity for each case and the corresponding frequency are reported. The maximum sensitivity to humidity ranges from 24% up to 308%. In the case of propane, the maximum sensitivity ranges from 45% up to 711%. The largest sensitivity values correspond in all cases to the imaginary part of the impedance. From the dynamical response, the response and recovery times are determined, along with the concentration-dependence of the sensitivity. The sensing mechanisms are also discussed.

773.1.#.t: Revista Mexicana de Física; Vol 55, No 004 (2009)

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Artículo

Ac response to humidity and propane of sprayed Fe-Zn oxide films

Avila-garcía, A.; García-hipólito, M.; Matsumoto-kuwabara, Y.

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

Avila-garcía, A., et al. (2009). Ac response to humidity and propane of sprayed Fe-Zn oxide films. Revista Mexicana de Física; Vol 55, No 004. Recuperado de https://repositorio.unam.mx/contenidos/41550

Descripción del recurso

Autor(es)
Avila-garcía, A.; García-hipólito, M.; Matsumoto-kuwabara, Y.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Ac response to humidity and propane of sprayed Fe-Zn oxide films
Fecha
2009-01-01
Resumen
Iron-zinc oxide films with different Zn contents were ultrasonically sprayed on glass substrates and inter-digital gold electrodes were evap- orated on them. Films were deposited from solutions containing 2, 10 and 30 at.% Zn. Hematite, amorphous and Franklinite structuresresulted, respectively. They were assessed as humidity and propane detectors under alternating-current conditions for frequencies from 1 to 105 Hz and two temperatures: 30 and 250◦C. Their impedances in dry air, humid air and humid air plus propane were determined from voltage measurements with a Lock-In amplifier. Sensitivity values to both humidity (53% RH.) and 189, 500 and 786 ppm of propane from the response of the real and imaginary parts of the impedance and also the total impedance were determined as functions of frequency. Maximum sensitivity for each case and the corresponding frequency are reported. The maximum sensitivity to humidity ranges from 24% up to 308%. In the case of propane, the maximum sensitivity ranges from 45% up to 711%. The largest sensitivity values correspond in all cases to the imaginary part of the impedance. From the dynamical response, the response and recovery times are determined, along with the concentration-dependence of the sensitivity. The sensing mechanisms are also discussed.
Tema
Iron-zinc oxide films; ultrasonic spray pyrolysis; AC measurements; humidity and propane sensors
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

Enlaces