Scientists have built the world’s smallest engine. It consists of a single microscopic particle, smaller than a human cell, levitating in a vacuum. By rattling this lone particle with “noisy” ...

Researchers created a microscopic version of the Stirling engine using a single particle. At such small scales, the random fluctuations of Brownian motion affect the position of the particle and the ...

Research has shown that "hot" processes such as welding and high-speed machining can generate ultrafine particles (particles with a diameter less than 100 nanometers) that may be harmful to workers' ...