TY - JOUR
T1 - Polyethylenimine coated carbon nanotube for detecting rancidity in frying oil
AU - Fai, Vincent Lau Chun
AU - Lee, Yang Doo
AU - Lee, Kyongsoo
AU - Lee, Keun Soo
AU - Shin-Kyung,
AU - Ju, Byeong Kwon
PY - 2011/2
Y1 - 2011/2
N2 - Chemical detection is still a continuous challenge when it comes to designing single-walled carbon nanotube (SWCNT) sensors with high selectivity, especially in complex chemical environments. A perfect example of such an environment would be in thermally oxidized soybean oil. At elevated temperatures, oil oxidizes through a series of chemical reactions which results in the formation of monoacylglycerols, diacylglycerols, oxidized triacylglycerols, dimers, trimers, polymers, free fatty acids, ketones, aldehydes, alcohols, esters, and other minor products. In order to detect the rancidity of oxidized soybean oil, carbon nanotube chemiresistor sensors have been coated with polyethylenimine (PEI) to enhance the sensitivity and selectivity. PEI functionalized SWCNTs are known to have a high selectivity towards strong electron withdrawing molecules. The sensors were very responsive to different oil oxidation levels and furthermore, displayed a rapid recovery in ambient air without the need of heating or UV exposure.
AB - Chemical detection is still a continuous challenge when it comes to designing single-walled carbon nanotube (SWCNT) sensors with high selectivity, especially in complex chemical environments. A perfect example of such an environment would be in thermally oxidized soybean oil. At elevated temperatures, oil oxidizes through a series of chemical reactions which results in the formation of monoacylglycerols, diacylglycerols, oxidized triacylglycerols, dimers, trimers, polymers, free fatty acids, ketones, aldehydes, alcohols, esters, and other minor products. In order to detect the rancidity of oxidized soybean oil, carbon nanotube chemiresistor sensors have been coated with polyethylenimine (PEI) to enhance the sensitivity and selectivity. PEI functionalized SWCNTs are known to have a high selectivity towards strong electron withdrawing molecules. The sensors were very responsive to different oil oxidation levels and furthermore, displayed a rapid recovery in ambient air without the need of heating or UV exposure.
KW - Carbon nanotubes
KW - Oxidized oil
KW - Polyethylenimine
KW - Sensor
UR - http://www.scopus.com/inward/record.url?scp=79953274441&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953274441&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:79953274441
SN - 2010-376X
VL - 74
SP - 705
EP - 708
JO - World Academy of Science, Engineering and Technology
JF - World Academy of Science, Engineering and Technology
ER -