Research in the Lewis Group focuses on photoelectrochemistry and chemical vapor sensing.


We study ways to harness sunlight to generate chemical fuel, specifically by splitting water to generate hydrogen. These efforts have as their final goal the creation of a photoelectrochemical cell similar to the one pictured at right.

This cell consists of nanostructured arrays of anodes and cathodes, oxidation and reduction catalysts, and a central conductive membrane that allows for ion exchange. Various subgroups are addressing the challenges inherent in developing this cell:

Chemical Vapor Sensing

We are developing an Electronic Nose that consists of arrays of chemically sensitive conducting polymer films capable of detecting and quantifying a broad variety of analytes.

Lewis Research Group, Division of Chemistry and Chemical Engineering
Caltech 127-72, 1200 East California Boulevard, Pasadena, California 91125