One-atom substitution successfully tunes molecular heat transport for the first time

Control of heat transport in nanostructures is of central importance for numerous modern technologies—from high-performance computer chips that need to be cooled to energy converters—and is a highly active area of research. While great progress has been made in recent years in understanding how heat transport can be influenced by nanostructuring, it was previously unclear whether the replacement of a single atom in a molecule could measurably alter phonon transport—i.e. heat transport through lattice vibrations.