Paper Info
Title
An Electrochemical NO₂ Sensor Based on Ionic Liquid: Influence of the Morphology of the Polymer Electrolyte on Sensor Sensitivity.
Abstract
A systematic study was carried out to investigate the effect of ionic liquid in solid polymer electrolyte (SPE) and its layer morphology on the characteristics of an electrochemical amperometric nitrogen dioxide sensor. Five different ionic liquids were immobilized into a solid polymer electrolyte and key sensor parameters (sensitivity, response/recovery times, hysteresis and limit of detection) were characterized. The study revealed that the sensor based on 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][N(Tf)(2)]) showed the best sensitivity, fast response/recovery times, and low sensor response hysteresis. The working electrode, deposited from water-based carbon nanotube ink, was prepared by aerosol-jet printing technology. It was observed that the thermal treatment and crystallinity of poly(vinylidene fluoride) (PVDF) in the solid polymer electrolyte influenced the sensitivity. Picture analysis of the morphology of the SPE layer based on [EMIM][N(Tf)(2)] ionic liquid treated under different conditions suggests that the sensor sensitivity strongly depends on the fractal dimension of PVDF spherical objects in SPE. Their deformation, e.g., due to crowding, leads to a decrease in sensor sensitivity.
Year
DOI
Venue
2015
10.3390/s151128421
SENSORS
Keywords
Field
DocType
ionic liquid,amperometric NO2 sensor,carbon nanotube,aerosol-jet printing
Polymer,Analytical chemistry,Thermal treatment,Electrolyte,Ionic liquid,Engineering,Crystallinity,Carbon nanotube,Electrochemistry,Working electrode
Journal
Volume
Issue
ISSN
15
11.0
1424-8220
Citations 
PageRank 
References 
3
0.73
1
Authors
5
Name
Order
Citations
PageRank
Petr Kuberský130.73
Jakub Altšmíd230.73
Aleš Hamáček331.40
Stanislav Nešpůrek430.73
Oldrich Zmeskal531.07