A selective molecularly imprinted polymer-carbon nanotube sensor for cotinine sensing.

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 30 kΩ, 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.

Detection of secondhand cigarette smoke via nicotine using conductive polymer films.

Introduction: The 2006 U.S. Surgeon General's Report found that there is no safe level of exposure to secondhand smoke (SHS).