Single ZnO Nanowire-Based gas sensors to detect low concentrations of hydrogen
Por:
Cardoza-Contreras M.N., Romo-Herrera J.M., Ríos L.A., García-Gutiérrez R., Zepeda T.A., Contreras O.E.
Publicada:
1 dic 2015
Resumen:
Low concentrations of hazardous gases are difficult to detect with common gas sensors. Using semiconductor nanostructures as a sensor element is an alternative. Single ZnO nanowire gas sensor devices were fabricated by manipulation and connection of a single nanowire into a four-electrode aluminum probe in situ in a dual-beam scanning electron microscope-focused ion beam with a manipulator and a gas injection system in/column. The electrical response of the manufactured devices shows response times up to 29 s for a 121 ppm of H2 pulse, with a variation in the nanowire resistance appreciable at room temperature and at 373.15 K of approximately 8% and 14% respectively, showing that ZnO nanowires are good candidates to detect low concentrations of H2. © 2015 by the authors; licensee MDPI, Basel, Switzerland.
Filiaciones:
Cardoza-Contreras M.N.:
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Mexico City 22800, Baja California, Mexico
Romo-Herrera J.M.:
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Mexico City 22800, Baja California, Mexico
Ríos L.A.:
Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California 22860, Mexico
García-Gutiérrez R.:
Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, 83000, Mexico
Zepeda T.A.:
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Mexico City 22800, Baja California, Mexico
Contreras O.E.:
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Mexico City 22800, Baja California, Mexico
Gold
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