Journal
JOURNAL OF MOLECULAR RECOGNITION
Volume 27, Issue 1, Pages 57-63Publisher
WILEY
DOI: 10.1002/jmr.2331
Keywords
molecularly imprinted polymer; conductive sensor; cotinine; carbon nanotube composite; poly-4-vinylphenol; thin films
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Funding
- Richmond Center of Excellence of the American Academy of Pediatrics
- Flight Attendants Medical Research Institute
- Women in Science Program at Dartmouth College
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Conductive composite films comprised of single-walled carbon nanotubes coated with molecularly imprinted poly-4-vinylphenol are produced and characterized using ultraviolet and infrared spectroscopies, confirming the successful molecular imprinting of the film with cotinine. The electrical resistance of the imprinted film changes significantly upon binding cotinine, by more than 30k, while the unimprinted film in comparison elicits little response. Additionally, once the cotinine template desorbs from the film, the resistance of the imprinted film returns to a value close to the pre-adsorption baseline. Scanning electron microscopy is used to study the morphology of the film compared with the unimprinted control, and gas chromatography quantitatively confirms that the imprinted film selectively detects cotinine while discriminating against the structurally similar alkaloid, nicotine. Copyright (c) 2013 John Wiley & Sons, Ltd.
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