While at Stanford University, we invented, published, and patented the world's first microfabricated sensors capable of differentiating and quantifying molecules in air. They are based on a new sensing principle: voltammetric sensing. This method probes for the redox potential of ambient molecules, a unique signature, to differentiate and quantify them. 

Voltammetric sensors produce high quality data similar to IR spectroscopy, at a price level comparable to other microfabricated sensors (metal oxide, galvanic, NDIR, etc.). The ability to differentiate and quantify gases at low cost makes them ideal for deployment as part of a chemical sensing IoT network.