³He spin-echo scattering indicates hindered diffusion of isolated water molecules on graphene-covered Ir(111).

ABSTRACT: The dynamics of water diffusion on carbon surfaces are of interest in fields as diverse as furthering the use of graphene as an industrial-coating technology and understanding the catalytic role of carbon-based dust grains in the interstellar medium. The early stages of water-ice growth and the mobility of water adsorbates are inherently dependent on the microscopic mechanisms that facilitate water diffusion. Here, we use ³He spin-echo quasi-inelastic scattering to probe the microscopic mechanisms responsible for the diffusion of isolated water molecules on graphene-covered and bare Ir(111). The scattering of He atoms provides a non-invasive and highly surface-sensitive means to measure the rate at which absorbates move around on a substrate at very low coverage. Our results pro

SUBMITTER: Kyrkjebo S 

PROVIDER: S-EPMC10587411 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature