Speaker
Dr
Ranjana Rautela
Description
Chemical warfare agents (CWAs) are potential threats to civil society and defence personnel. In recent years, many efforts has been deployed to develop a scalable, rapid and accurate detection system to identify trace amount of CWAs. Here we report a graphene-based field-effect transistor (GFET) sensor able to detect 800 ppb of dimethyl methyl phosphonate (DMMP), a simulant of the nerve agent sarin. We observe enhanced sensitivity when the GFET sensor is exposed to few mWs of UV light. Back gate measurements performed before and during exposures to the analyte allow us to investigate the sensing mechanism while monitoring the induced changes in carrier concentration and mobility in graphene.
Primary author
Co-authors
Dr
Jaewoo Park
(University of Ottawa, Canada)
Dr
Erika Natalia Alzate Carvajal
(University of Ottawa, Canada)
Samantha Scarfe
(University of Ottawa)
Lukas Scarfe
Prof.
Adina Luican-Mayer
(University of Ottawa)
Prof.
Jean-Michel Ménard
(University of Ottawa)
