Electrospun nanofibers; Nanofiber diameter; Nitric oxide (NO); Sensor structure; Sensor thickness; Zinc oxide (ZnO); Gas detection; Gas sensing; Nitric oxide; Oxide gas; Sensing performance; Sensor structures; Zinc oxide; Chemistry (all); Chemical Engineering (all); Polymers and Plastics
Abstract :
[en] We report a systematic investigation into the optimization of ZnO nanofiber-based NO gas sensors through precise control of structural parameters. By employing electrospinning technique, we fabricated ZnO nanofibers with controlled diameters (160–310 nm) and thicknesses (19–25 μm), enabling detailed analysis of structure–property relationships in gas sensing performance. The sensors exhibited optimal performance at 200 °C operating temperature, with the thinnest membrane (160 μm) and smallest fiber diameter (9.52 μm) demonstrating superior sensing capabilities. Under these optimized conditions, the sensor achieved a remarkable sensitivity of 25 (Ω/Ω) toward 500 ppb NO gas with a notably fast recovery time of 191 s. Structural characterization revealed that reducing membrane thickness by 30% enhanced sensitivity by 96%, attributed to increased pore area accessibility. In addition, decreasing nanofiber diameter by 90% resulted in a twofold improvement in NO gas sensitivity. The sensing mechanism was elucidated through energy band analysis, revealing the critical role of electron depletion layer modulation at the gas–solid interface. The sensors demonstrated excellent selectivity against common interferents including ethanol, isopropanol, and acetone, with NO response approximately 84 times greater than these compounds. This study provides crucial insights into the rational design of metal oxide nanofiber architectures for enhanced gas sensing performance, offering potential applications in both industrial and biomedical monitoring systems.
Disciplines :
Materials science & engineering
Author, co-author :
Khomarloo, Niloufar; Advanced Fibrous Materials Lab (AFM-LAB), Institute for Advanced Textile Materials and Technology, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran ; Université de Lille, ENGYSYS, Lille, France ; Textile Engineering Department, Textile Research and Excellence Centers, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
Gidik, Hayriye; Université de Lille, ENSAIT, Laboratoire Génie Et Matériaux Textile (GEMTEX), Lille, France ; Junia, Lille, France
Bagherzadeh, Roohollah ; Advanced Fibrous Materials Lab (AFM-LAB), Institute for Advanced Textile Materials and Technology, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
Latifi, Masoud; Textile Engineering Department, Textile Research and Excellence Centers, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
Debliquy, Marc ; Université de Mons - UMONS > Faculté Polytechnique > Service de Science des Matériaux
Ly, Ahmadou ; Université de Mons - UMONS > Unités externes > Materia Nova ASBL ; Sensors Unit, Materia Nova ASBL, Mons, Belgium
Lahem, Driss ; Université de Mons - UMONS > Unités externes > Materia Nova ASBL ; Sensors Unit, Materia Nova ASBL, Mons, Belgium
Mohsenzadeh, Elham; Université de Lille, ENSAIT, Laboratoire Génie Et Matériaux Textile (GEMTEX), Lille, France ; Junia, Lille, France
Language :
English
Title :
Enhancing Nitric Oxide Gas Detection by Tuning the Structural Dimension of Electrospun ZnO Nanofibers Fibers and Polymers
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
Iran National Science Foundation
Funding text :
This research project receives financial support from R\u00E9gion Hauts de France. This work is based upon research funded by Iran National Science Foundation (INSF) under project No.4020210.This work was funded by Iran National Science Foundation, 4020210, Roohollah Bagherzadeh.
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