Speaker
Description
The high scattering cross section of neutron and helium beams towards hydrogen provides experimental access to the structure and dynamics of hydrogen containing molecules at carbon materials, including e.g. the molecular motion of water. I will present experimental and theoretical results of hydrogen containing molecules ad-sorbed on carbon surfaces. These include the structure and dynamics of deuterated pyrazine on graphite, providing insight in how the van der Waals interaction between adsorbates and the substrate influences adsorbate structure and stability. Moreover, I will present recent neutron-spin echo measurements of adenine and thymine ad-sorbed on graphite, to better understand hydrogen bond formation in DNA base pairs, tautomerisation rates, and proton tunnelling.