How Can We Control Phonon-Phonon Scattering in Nanomaterials?
Controlling phonon-phonon scattering can be achieved through several strategies:
1. Material Engineering: By designing materials with specific atomic structures and compositions, the phonon dispersion relations can be tuned to minimize scattering.
2. Nanostructuring: Creating nanostructures such as superlattices, nanowires, and nanoparticles can effectively manipulate phonon transport properties. Interfaces and boundaries in these structures can scatter phonons and reduce thermal conductivity.
3. Isotopic Doping: Introducing isotopes into a material can disrupt the phonon modes and increase phonon-phonon scattering, thereby reducing thermal conductivity.
