  Graphane and graphene are both two-dimensional materials but of different
bonding configurations, which can result in distinct thermal conduction
properties. We simulate thermal conduction in graphane nanoribbons (GANRs)
using the nonequilibrium Green's function method. It is found that GANRs have
lower ballistic thermal conductance and stronger thermal conductance anisotropy
than the graphene counterparts. Furthermore, hydrogen vacancies of GANRs
considerably suppress thermal conduction, accompanied by enhanced thermal
conductance anisotropy. The tunable thermal conduction, realized by controlling
the width, edge shape and hydrogen vacancy concentration of GANRs, could be
useful for thermal management and thermoelectric applications.

Mesoscale and Nanoscale Physics;Materials Science