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Silver enhances hematite nanoparticles based ethanol sensor response and selectivity at room temperature

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dc.contributor.author Garcia-Osorio, Daniel es_PE
dc.contributor.author Hidalgo-Falla, Pilar es_PE
dc.contributor.author Peres, Henrique E. M. es_PE
dc.contributor.author Gonçalves, Josue M. es_PE
dc.contributor.author Araki, Koiti es_PE
dc.contributor.author Garcia-Segura, Sergi es_PE
dc.contributor.author Picasso, Gino es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2021
dc.description.abstract Gas sensors are fundamental for continuous online monitoring of volatile organic com-pounds. Gas sensors based on semiconductor materials have demonstrated to be highly competitive, but are generally made of expensive materials and operate at high temperatures, which are draw-backs of these technologies. Herein is described a novel ethanol sensor for room temperature (25◦C) measurements based on hematite (α-Fe2O3 )/silver nanoparticles. The AgNPs were shown to increase the oxide semiconductor charge carrier density, but especially to enhance the ethanol adsorption rate boosting the selectivity and sensitivity, thus allowing quantification of ethanol vapor in 2–35 mg L−1 range with an excellent linear relationship. In addition, the α-Fe2O3/Ag 3.0 wt% nanocomposite is cheap, and easy to make and process, imparting high perspectives for real applications in breath analyzers and/or sensors in food and beverage industries. This work contributes to the advance of gas sensing at ambient temperature as a competitive alternative for quantification of conventional volatile organic compounds. © 2021 by the authors. Li-censee MDPI, Basel, Switzerland.
dc.description.sponsorship Fondo Nacional de Desarrollo Científico y Tecnológico - Fondecyt
dc.identifier.doi https://doi.org/10.3390/s21020440
dc.identifier.scopus 2-s2.0-85099206012
dc.identifier.uri https://hdl.handle.net/20.500.12390/2410
dc.language.iso eng
dc.publisher MDPI AG
dc.relation.ispartof Sensors (Switzerland)
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Silver decorated hematite
dc.subject Alcohol sensor es_PE
dc.subject Hematite (α-Fe2O3 ) es_PE
dc.subject Metal oxide gas sensors es_PE
dc.subject Nano-enabled gas sensors es_PE
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.06.03
dc.title Silver enhances hematite nanoparticles based ethanol sensor response and selectivity at room temperature
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication
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