Edward Zellers' research and teaching programs are concerned with various aspects of characterizing and controlling human exposures to toxic chemicals, including sampling and analytical methods and instrumentation, assessment strategies, and protective equipment. His interests in occupational and environmental health relate to both the fundamental and applied aspects of chemical hazard evaluation and control. His current research interests are in the development of chemical sensors and sensor arrays for monitoring simple organic molecules in air and biological media, and for characterizing thin films; the implementation of sensor-based systems for occupational & environmental monitoring applications; the development of integrated microanalytical systems for multi-vapor analysis; and the characterization and modeling of polymer-solvent interactions as they affect the barrier properties of the polymer to solvent permeation.