Sensitivity Enhancement of Benzene Sensor Using Ethyl Cellulose-Coated Surface-Functionalized Carbon Nanotubes

dc.contributor.authorThanattha Chobsilpen_US
dc.contributor.authorWorawut Muangraten_US
dc.contributor.authorChaisak Issroen_US
dc.contributor.authorWeerawut Chaiwaten_US
dc.contributor.authorApiluck Eiad-Uaen_US
dc.contributor.authorKomkrit Suttiponparniten_US
dc.contributor.authorWinadda Wongwiriyapanen_US
dc.contributor.authorTawatchai Charinpanitkulen_US
dc.contributor.otherPTT Public Company Limiteden_US
dc.contributor.otherShinshu Universityen_US
dc.contributor.otherChulalongkorn Universityen_US
dc.contributor.otherKing Mongkut's Institute of Technology Ladkrabangen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherBurapha Universityen_US
dc.description.abstract© 2018 Thanattha Chobsilp et al. A hybrid sensor based on the integration of functionalized multiwalled carbon nanotubes (MWCNTs) with ethyl cellulose (EC) was fabricated for sensitivity enhancement of benzene detection. To functionalize the surface of MWCNTs, MWCNTs were treated with hydrochloric acid for 60 min (A60-MWCNTs), while other MWCNTs were treated with oxygen plasma for 30, 60, 90, and 120 min (P30-MWCNTs, P60-MWCNTs, P90-MWCNTs, and P120-MWCNTs, resp.). Pristine MWCNTs, A-MWCNTs, and P-MWCNTs were dispersed in 1,2-dichloroethane, then dropped onto a printed circuit board consisting of Cu/Au electrodes used as the sensor platform. Next, EC was separately spin coated on the pristine MWCNTs, A-MWCNTs, and P-MWCNTs (EC/MWCNTs, EC/A-MWCNTs, and EC/P-MWCNTs, resp.). All sensors responded to benzene vapor at room temperature by increasing their electrical resistance which was sensitive to benzene vapor. The EC/P90-MWCNTs enabled an approximately 11-fold improvement in benzene detection compared to EC/MWCNTs. The sensitivity of all sensors would be attributed to the swelling of EC, resulting in the loosening of the MWCNT network after benzene vapor exposure. The differences of the sensing responses of the EC/MWCNTs, EC/A-MWCNTs, and EC/P-MWCNTs would be ascribed to the differences in crystallinity and functionalization of MWCNT sidewalls, suggesting that acid and oxygen plasma treatments of MWCNTs would be promising techniques for the improvement of benzene detection.en_US
dc.identifier.citationJournal of Sensors. Vol.2018, (2018)en_US
dc.rightsMahidol Universityen_US
dc.subjectPhysics and Astronomyen_US
dc.titleSensitivity Enhancement of Benzene Sensor Using Ethyl Cellulose-Coated Surface-Functionalized Carbon Nanotubesen_US