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Polyethylenimine Coated Carbon Nanotube for Detecting Rancidity in Frying Oil
Abstract: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.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1059675Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1408
 Peng G., Tisch U., Haick H. Detection of nonpolar molecules by means of carrier scattering in random networks of carbon nanotubes: toward diagnosis of diseases via breath samples. Nano Lett. 2009;9:1362-1368.
 Qi P., Vermesh O., Grecu M., Javey A., Wang Q., Dai H. et al. Toward large arrays of multiplex functionalized carbon nanotube sensors for highly sensitive and selective molecular detection. Nano Lett. 2003;3:347-351.
 Wang Y., Zhou Z., Yang Z., Chen X., Xu D., Zhang Y. Gas sensors based on deposited single-walled carbon nanotube networks for DMMP detection. Nanotechnology 2009;20:345502.
 Seppanen C.M., Csallany A. S. Formation of 4-hydroxynonenal, a toxic aldehyde, in soybean oil at frying temperature. JAOCS 2002;79:1033-1038.
 Picariello G., Paduano A., Sacchi R., Addeo F. MALDI-TOF mass spectrometry profiling of polar and nonpolar fractions in heated vegetable oils. J. Agric. Food Chem. 2009;57:5391-5400.
 Mahungu S. M., Hansen S. L., Artz W. E. Identification and quantitation of volatile compounds in two heated model compounds, trilinolein and linoleic acid esterified propoxylated glycerol. J. Agric. Food Chem. 1999;47:690-694.
 Bienfait M., Zeppenfeld P., Dupont-Pavlovsky N., Muris M., Johnson M. R., Wilson T. et al. Thermodynamics and structure of hydrogen, methane, argon, oxygen, and carbon dioxide adsorbed on single-wall carbon nanotube bundles. Phys. Rev B 2004;70:035410-1-10.
 Zambano A. J., Talapatra S., Migone A. D. Binding energy and monolayer capacity of Xe on single-wall carbon nanotube bundles. Phys. Rev B 2001;64:075415-1-6.
 Klinke C., Afzali A., Avouris P. Interaction of solid organic acids with carbon nanotube field effect transistors. Chem. Phys. Lett. 2006;430:75-79.
 Kong J., Dai H. Full and modulated chemical gating of individual carbon nanotubes by organic amine compounds. J. Phys. Chem. B 2001;105:2890-2893.
 Lee C. Y., Strano M. S. Amine basicity (pKb) controls the analyte binding energy on single walled carbon nanotube electronic sensor arrays. J. Am. Chem. Soc. 2008;130:1766-1773.
 Shim M., Javey A., Kam N. W. S., Dai H. Polymer functionalization for air-stable n-type carbon nanotube field-effect transistors. J. Am. Chem. Soc. 2001;123:11512-11513.
 Bekyarova E., Itkis M. E., Cabrera N., Zhao B., Yu A., Gao J. et al. Electronic properties of single-walled carbon nanotube networks. J. Am. Chem. Soc. 2005;127:5990-5995.