Chemically sensitive field-effect transistor to detect organophosphorous compounds and pesticides
Janati, J.; Huber, R.J.; Cohen, R.; Kolesar, E.S.
Aviation Space and Environmental Medicine 52(11 Pt 1): 666-671
1981
ISSN/ISBN: 0095-6562 PMID: 7305794 Document Number: 180234
A critical assessment was made concerning the application of a chemically sensitive field-effect transistor (CHEMFET) to detect organophosphorous compounds and pesticides in the ambient environment at the ppb concentration level. A performance analysis of the 4 types of CHEMFET structures, enzyme-coupled, galvanostatic, catalytic and work-function, was presented. The integration of chemically sensitive polymers with the field-effect transistor structure was addressed. The focus of the assessment dealt with practical performance criteria such as sensitivity, response time, reversibility, shelf-life, operational life and lifetime.