ChemistryVapour-sniffing drug detector tested at the US-Mexico border Drugs and explosive chemicals are difficult to detect, but a device more sensitive than a dog’s nose can pick up their traces in seconds News
ChemistryMetals can be squeezed into sheets just a few atoms thick Sheets of bismuth, gallium, indium, tin and lead can now be made just a few atoms thick by crushing them at a high temperature and pressure between two sapphires News