Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Performance of Flexible Chemoresistive Gas Sensors after Having Undergone Automated Bending Tests

  • Identification data

    Identifier: imarina:5989075
    Authors:
    Alvarado, MiriamDe La Flor, SilviaLlobet, EduardRomero, AlfonsoRamirez, Jose Luis
    Abstract:
    Many sensors are developed over flexible substrates to be used as wearables, which does not guarantee that they will actually withstand being bent. This work evaluates the gas sensing performance of metal oxide devices of three different types, before and after having undergone automated, repetitive bending tests. These tests were aimed at demonstrating that the fabricated sensors were actually flexible, which cannot be taken for granted beforehand. The active layer in these sensors consisted of WO3 nanowires (NWs) grown directly over a Kapton foil by means of the aerosol-assisted chemical vapor deposition. Their response to different H2 concentrations was measured at first. Then, they were cyclically bent, and finally, their response to H2 was measured again. Sensors based on pristine WO3-NWs over Ag electrodes and on Pd-decorated NWs over Au electrodes maintained their performance after having been bent. Ag electrodes covered with Pd-decorated NWs became fragile and lost their usefulness. To summarize, two different types of truly flexible metal oxide gas sensor were fabricated, whereas a third one was not flexible, despite being grown over a flexible substrate following the same method. Finally, we recommend that one standard bending test procedure should be established to clearly determine the flexibility of a sensor considering its intended application.
  • Others:

    Author, as appears in the article.: Alvarado, Miriam; De La Flor, Silvia; Llobet, Eduard; Romero, Alfonso; Ramirez, Jose Luis
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: De la Flor Lopez, Silvia / Llobet Valero, Eduard / Ramírez Falo, José Luis / Romero Nevado, Alfonso José
    Keywords: Polymeric substrate Nanowires Metal oxide Gas sensor Flexible sensor Bending tests nanowires metal oxide gas sensor flexible sensor bending tests
    Abstract: Many sensors are developed over flexible substrates to be used as wearables, which does not guarantee that they will actually withstand being bent. This work evaluates the gas sensing performance of metal oxide devices of three different types, before and after having undergone automated, repetitive bending tests. These tests were aimed at demonstrating that the fabricated sensors were actually flexible, which cannot be taken for granted beforehand. The active layer in these sensors consisted of WO3 nanowires (NWs) grown directly over a Kapton foil by means of the aerosol-assisted chemical vapor deposition. Their response to different H2 concentrations was measured at first. Then, they were cyclically bent, and finally, their response to H2 was measured again. Sensors based on pristine WO3-NWs over Ag electrodes and on Pd-decorated NWs over Au electrodes maintained their performance after having been bent. Ag electrodes covered with Pd-decorated NWs became fragile and lost their usefulness. To summarize, two different types of truly flexible metal oxide gas sensor were fabricated, whereas a third one was not flexible, despite being grown over a flexible substrate following the same method. Finally, we recommend that one standard bending test procedure should be established to clearly determine the flexibility of a sensor considering its intended application.
    Thematic Areas: Zootecnia / recursos pesqueiros Química Medicine (miscellaneous) Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Linguística e literatura Letras / linguística Interdisciplinar Instruments & instrumentation Instrumentation Information systems Geografía Geociências Farmacia Engineering, electrical & electronic Engenharias iv Engenharias iii Engenharias ii Engenharias i Electrochemistry Electrical and electronic engineering Educação física Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, analytical Biotecnología Biodiversidade Biochemistry Atomic and molecular physics, and optics Astronomia / física Arquitetura, urbanismo e design Analytical chemistry
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 14248220
    Author's mail: eduard.llobet@urv.cat joseluis.ramirez@urv.cat alfonsojose.romero@urv.cat silvia.delaflor@urv.cat
    Author identifier: 0000-0001-6164-4342 0000-0001-8231-4019 0000-0003-3502-0813 0000-0002-6851-1371
    Record's date: 2024-10-12
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.mdpi.com/1424-8220/19/23/5190
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Sensors. 19 (23): 5190-
    APA: Alvarado, Miriam; De La Flor, Silvia; Llobet, Eduard; Romero, Alfonso; Ramirez, Jose Luis (2019). Performance of Flexible Chemoresistive Gas Sensors after Having Undergone Automated Bending Tests. Sensors, 19(23), 5190-. DOI: 10.3390/s19235190
    Article's DOI: 10.3390/s19235190
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2019
    Publication Type: Journal Publications
  • Keywords:

    Analytical Chemistry,Atomic and Molecular Physics, and Optics,Biochemistry,Chemistry, Analytical,Electrical and Electronic Engineering,Electrochemistry,Engineering, Electrical & Electronic,Information Systems,Instrumentation,Instruments & Instrumentation,Medicine (Miscellaneous)
    Polymeric substrate
    Nanowires
    Metal oxide
    Gas sensor
    Flexible sensor
    Bending tests
    nanowires
    metal oxide
    gas sensor
    flexible sensor
    bending tests
    Zootecnia / recursos pesqueiros
    Química
    Medicine (miscellaneous)
    Medicina veterinaria
    Medicina iii
    Medicina ii
    Medicina i
    Materiais
    Matemática / probabilidade e estatística
    Linguística e literatura
    Letras / linguística
    Interdisciplinar
    Instruments & instrumentation
    Instrumentation
    Information systems
    Geografía
    Geociências
    Farmacia
    Engineering, electrical & electronic
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Electrochemistry
    Electrical and electronic engineering
    Educação física
    Ciências biológicas iii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Ciência de alimentos
    Ciência da computação
    Chemistry, analytical
    Biotecnología
    Biodiversidade
    Biochemistry
    Atomic and molecular physics, and optics
    Astronomia / física
    Arquitetura, urbanismo e design
    Analytical chemistry
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