Highly Sensitive Sensor for Trace Level Detection of Euschistus heros Pheromone

摘要

Nanotechnology presents one of the most promising solutions to developing and improving devices for detection and identification of semiochemicals. The present work reports the development of a novel nanostructured sensor with high sensitivity and limit of detection. Polyaniline (PANI) was used as a recognition layer for the trace level detection of methyl-2,6,10 trimethyltridecanoate sex pheromone. The sensitive layer was characterized by atomic force microscopy during each layer deposition and uniform films with nanoscale thickness (87?nm) and a granular morphology were observed. The nanostructured cantilever demonstrated good performance and ability to detect the semiochemical of brown stink bug, with wide linearity range and high detection limits of 1.44 fg/mL. Therefore, this work suggests a design for a highly sensitive cantilever-based nanosensor for the detection of the sex pheromone of the brown stink bug.