ABSTRACT
The integration between nanomaterials and sensor devices allows for a various number of nanosensor construction and applications, including monitoring of environmental pollutions. Nanosensor is a smart alternative to the classical analytical instrument that allows highly sensitive, selective, and online detection of environmental pollutants with simple or less preparation. This chapter describes technology advances in nanosensors that utilize electrochemical, optical, colorimetric, and magnetic properties to improve the sensor analytical performance for environmental pollutant detections. Gold nanoparticles, magnetic nanoparticles, carbon nanotubes, quantum dots, etc., as nanomaterials have been actively investigated for nanosensor developments based on various transducer modes. The nanosensor technology will eventually create tiny sensing devices for rapid detection and screening of a wide range of environmental pollutants with high selectivity 62and sensitivity at an affordable price that have become a smart analytical tool in environmental monitoring in the near future.
