Sniffing the Air with an Electronic Nose

摘要

The human nose is a marvel at detecting more than 10,000 different airborne chemicals. For more than a decade, scientists have been attempting to emulate and even surpass the capabilities of the human nose with devices sometimes called "electronic noses." New sensor technologies have been invented to aid medical diagnosis, ensure quality control in the food and beverage industries, detect high explosives in airports, and search for toxic gases in factories.