Title :
Polyaniline Nanofiber Based Surface Acoustic Wave Gas Sensors—Effect of Nanofiber Diameter on H2 Response
Author :
Sadek, Abu Z. ; Baker, Christina O. ; Powell, David A. ; Wlodarski, Wojtek ; Kaner, Richard B. ; Kalantar-zadeh, Kourosh
Author_Institution :
Sch. of Electr. & Comput. Eng., R. Melbourne Inst. of Technol., Vic.
Abstract :
A template-free rapidly mixed reaction was employed to synthesize polyaniline nanofibers using chemical oxidative polymerization of aniline. Hydrochloric acid (HCl) and camphor sulfonic acid (CSA) were used in the synthesis to obtain 30- and 50-nm average diameter polyaniline nanofibers. The nanofibers were deposited onto layered ZnO/64deg YX LiNbO3 surface-acoustic-wave transducers. The sensors were tested toward hydrogen (H2) gas while operating at room temperature. The dopant for the polyaniline nanofiber synthesis was found to have a significant effect on the device sensitivity. The sensor response was found to be larger for the 50-nm diameter CSA-doped nanofiber based sensors, while the response and recovery times were faster for the 30-nm diameter HCl-doped nanofibers
Keywords :
conducting polymers; gas sensors; hydrogen; lithium compounds; nanostructured materials; polymerisation; surface acoustic wave sensors; surface acoustic wave transducers; zinc compounds; 30 nm; 50 nm; CSA-doped nanofiber based sensors; H2; H2 response; HCl-doped nanofibers; LiNbO3; ZnO; camphor sulfonic acid; chemical oxidative polymerization; hydrochloric acid; hydrogen gas; polyaniline nanofiber diameter; polyaniline nanofiber synthesis; surface acoustic wave gas sensors; surface-acoustic-wave transducers; template-free rapidly mixed reaction; Acoustic waves; Chemical sensors; Gas detectors; Hydrogen; Polymers; Surface acoustic waves; Temperature sensors; Testing; Transducers; Zinc oxide; $hbox{H}_{2}$ sensor; Conducting polymer; polyaniline nanofiber; rapidly mixed; surface acoustic wave (SAW);
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2006.883769
