A team of researchers from Trinity College Dublin and the Universität Mainz has developed the world’s smallest engine. The nanoscale heat engine. Image credit: John Goold, Trinity College Dublin. The nanoscale engine — a trapped 40Ca+ ion — is approximately 10 billion times smaller than a car engine. It is electrically charged, which makes it easy to trap using electric fields. The working substance of the engine is the ion’s ‘intrinsic...
