METHOD OF ENHANCED DETECTION FOR NANOMATERIAL-BASED MOLECULAR SENSORS

摘要

Sensors based on single-walled carbon nanotubes and graphene which demonstrate extreme sensitivity as reflected in their electrical conductivity to gaseous molecules, such as NO, NO₂ and NH₃, when exposed to in situ ultraviolet (UV) illumination during measurement of the analytes are disclosed. The sensors are capable of detection limits of NO down to almost 150 parts-per-quadrillion (“ppq”), detection limits of NO₂ to 2 parts-per-trillion (“ppt”), and detection limits of NH₃ of 33 ppt.