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