Might as well hammer a buzz-phrase while you can, eh? But that’s what Gerald Hoegl, CEO of Metcomb Nanostructures, likes to call his company’s new product. It’s a type of honeycombed aluminium that weighs less than a fifth of the normal brand, so light in fact that it floats on water. Metcomb are planning to start selling the stuff to the aerospace and automotive industries, a sign that nanotech start-ups are making noises outside of the US.