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Grafting Multiwalled Carbon Nanotubes with Polystyrene to Enable Self-Assembly and Anisotropic Patchiness
Published on: April 1, 2018
A selective chemiresistive sensor for the cancer-related volatile organic compound hexanal by using molecularly
Sajjad Janfaza1, Maryam Banan Nojavani2, Maryam Nikkhah3
1Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran, 14117, Iran.
Abstract:
A chemiresistive sensor is described for the lung cancer biomarker hexanal. A composite consisting of molecularly imprinted polymer nanoparticles and multiwalled carbon nanotubes was used in the sensor that is typically operated at a voltage of 4 V and is capable of selectively sensing gaseous hexanal at room temperature. It works in the 10 to 200 ppm concentration range and has a 10 ppm detection limit (at S/N = 3). The sensor signal recovers to a value close to its starting value without the need for heating even after exposure to relatively high levels of hexanal. Graphical abstract Schematic presentation of a chemiresistive sensor for detection of hexanal, a cancer biomarker. The hexanal-imprinted polymeric nanoparticles were synthesized, mixed with multiwalled carbon nanotubes and coated on the surface of an interdigitated electrode to produce a nanocomposite chemiresistor gas sensor for hexanal.
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