Article (Scientific journals)
Enhanced Gas Detection by Altering Gate Voltage Polarity of Polypyrrole/Graphene Field-Effect Transistor Sensor
Tang, Xiaohui; Raskin, Jean-Pierre; Reckinger, Nicolas et al.
2022In Chemosensors, 10 (11), p. 467
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Keywords :
back-gate voltage polarity; field-effect transistor sensor; gas detection; graphene; polypyrrole; Analytical Chemistry; Physical and Theoretical Chemistry
Abstract :
[en] This work introduces a new measurement methodology for enhancing gas detection by tuning the magnitude and polarity of back-gate voltage of a field-effect transistor (FET)-based sensor. The aim is to simultaneously strengthen the sensor response and accelerate the sensor recovery. In addition, this methodology can consume less energy compared with conventional measurements by direct current bias. To illustrate the benefits of the proposed methodology, we fabricated and characterized a polypyrrole/graphene (PPy/G) FET sensor for ammonia (NH3) detection. Our experiment, simulation and calculation results demonstrated that the redox reaction between the NH3 molecules and the PPy/G sensitive layer could be controlled by altering the polarity and the magnitude of the back-gate voltage. This proof-of-principle measurement methodology, which solves the inherent contradiction between high response and slow recovery of the chemiresistive sensor, could be extended to detect other gases, so as to improve global gas measurement systems. It opens up a new route for FET-based gas sensors in practical applications.
Research center :
CRIM - Ingénierie des matériaux
Disciplines :
Materials science & engineering
Author, co-author :
Tang, Xiaohui;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Université Catholique de Louvain (UCLouvain), Louvain-la-Neuve, Belgium
Raskin, Jean-Pierre;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Université Catholique de Louvain (UCLouvain), Louvain-la-Neuve, Belgium
Reckinger, Nicolas ;  Institute of Condensed Matter and Nanosciences/Nanoscopic Physics (IMCN/NAPS), Université Catholique de Louvain (UCLouvain), Louvain-la-Neuve, Belgium
Yan, Yiyi ;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Université Catholique de Louvain (UCLouvain), Louvain-la-Neuve, Belgium
André, Nicolas ;  Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Université Catholique de Louvain (UCLouvain), Louvain-la-Neuve, Belgium
Lahem, Driss  ;  Université de Mons - UMONS > Unités externes > Materia Nova ASBL ; Materia Nova ASBL, Mons, Belgium
Debliquy, Marc ;  Université de Mons - UMONS
Language :
English
Title :
Enhanced Gas Detection by Altering Gate Voltage Polarity of Polypyrrole/Graphene Field-Effect Transistor Sensor
Publication date :
November 2022
Journal title :
Chemosensors
eISSN :
2227-9040
Publisher :
MDPI
Volume :
10
Issue :
11
Pages :
467
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
F502 - Science des Matériaux
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
European Regional Development Fund
Funding text :
This research was funded by the European Regional Development Fund (ERDF); the Walloon Region of Belgium through the Micro + project (No. 675781-642409) and the AGROSENSOR project (Wagralim No.8127).We thank the Wallonia Infrastructure for nano fabrication (WINFAB) and the Wallonia electronics and communications measurements (WELCOME) platforms for access to the experimental facilities. We also thank the China Scholarship Council (CSC) program for the support.
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