This particular chip, assuming it is perfected and mass produced eventually, will make use of groups of nano-scale transistors which are capable of reacting to small electrical changes whenever certain kinds of chemicals pass by. Just how sensitive is it? Alarms can be raised even when a few molecules are discovered out of 1,000 trillion. Just in case you were wondering, prior techniques will issue an alert when they find such molecules within a per billion range, going to show just how far we have advanced to date.
Does this mean that bomb sniffing dogs are now out of a job? Not quite, as much work needs to be done where this prototype chip is concerned, and hopefully it will be able to tell the difference between a false alarm and the real deal eventually. Image courtesy of David Paul Morris via Getty Images.