February 16, 2021 For a researcher who started out in mechanical engineering with a focus on engine combustion, Martin Wissink has learned a lot about neutrons on the job. Wissink came to Oak Ridge National Laboratory as a postdoc with a keen interest in the lab’s big science tools, including its unrivaled neutron diagnostic capabilities. Much of his work the last few years has been to deploy those tools in the search for better materials and designs for ultra-efficient advanced combustion engines with low emission profiles. These engines, most likely running on alternative fuels, are expected to serve as a bridge to a fully decarbonized transportation sector.