How do Phonons Affect Thermal Conductivity in Nanomaterials?
The thermal conductivity of nanomaterials is significantly influenced by phonon behavior. In bulk materials, thermal conductivity is generally higher due to the relatively free movement of phonons. However, at the nanoscale, boundary scattering and phonon confinement can reduce thermal conductivity. This phenomenon is crucial for designing thermoelectric materials, where low thermal conductivity is desirable to maintain a temperature gradient and enhance efficiency.
