How Does Thermal Diffusivity Change at the Nanoscale?
At the nanoscale, thermal diffusivity can differ significantly from bulk materials due to quantum effects, increased surface scattering, and phonon confinement. These factors can either enhance or impede heat transfer depending on the material and its structure. For instance, carbon-based nanomaterials like graphene and carbon nanotubes exhibit high thermal diffusivity due to their excellent thermal conductivity and low heat capacity.
