Sintering is a common process for creating copper heat sinks that involves packing powdered metals into a particular shape and baking it in a vacuum. A funny thing happens though, if you leave out the vacuum part of the equation: you don't get a solid shape, but a porous pile of particles with hollow, nanowire whiskers sticking out of it. The serendipitous discovery could lead to a new way to make heat sinks for everything from CPUs to boilers at power plants. Now researchers at MIT are trying the process with practically every material they can get their hands on. Of
