A NASA scientist has created a 30-pin accessory that allows an iPhone or iPod touch to be used as a chemical sensor. Jing Li, a physical scientist at NASA’s Ames Research Center, along with other researchers in the Cell-All program in the Department of Homeland Security’s Science and Technology Directorate, built the postage stamp-sized device, which packs 16 nanosensors that allow for detection and identification of low concentrations airborne…
