Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 191, Issue -, Pages 643-649Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.10.053
Keywords
Sensor; Pheromone; Functionalization of cantilever; Conductive polymer; Polyaniline
Funding
- FAPESP [2009/08244-0]
- INCT-NAMITEC [CNPq 573738/2008-4]
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Bio-inspired materials designed for mimicking nature has gained attention in the last years, owing to their appealing properties, such as adhesive and self-cleaning properties. However, studies reporting bio-inspired sensors able to detect minimal amounts of pheromones are still scarce. Here we report on the functionalization of AFM cantilever with polyaniline (PANI), which was used as a sensor to detect pheromone 2-heptanone. This hormone is very significant for honey bees, which release it as a repellent scent marking to avoid enemies and other bees. The functionalization of the sensor was achieved by depositing a thin film of PANI in the emeraldine state on the cantilever through spin-coating. Infrared spectroscopy showed that the 2-heptanone was adsorbed by PANI film deposited on cantilever surface. The linear response of the coated cantilever sensor regarding 2-heptanone concentration for distinct temperatures was evaluated, as well as its mechanical behavior, hysteresis and storage time. The approach proposed here to functionalize AFM cantilever with PANI film to detect 2-heptanone showed a potential methodology for designing sensors able to detect minimal amounts of pheromones and natural compounds. (C) 2013 Elsevier B.V. All rights reserved.
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