Nanomesh phononic structures for low thermal conductivity and thermoelectric energy conversion materials

摘要

A nanomesh phononic structure includes: a sheet including a first material, the sheet having a plurality of phononic-sized features spaced apart at a phononic pitch, the phononic pitch being smaller than or equal to twice a maximum phonon mean free path of the first material and the phononic size being smaller than or equal to the maximum phonon mean free path of the first material.

主权项

1. A nanomesh phononic structure comprising:
a mesh comprising a first material, the mesh having a plurality of phononic-sized features spaced apart at a phononic pitch, the phononic pitch being smaller than or equal to twice a maximum phonon mean free path of the first material and the phononic size being smaller than or equal to the maximum phonon mean free path of the first material, wherein the phononic size is in the range from 5 nm to 100 nm, wherein the phononic-sized features are discontinuous holes or voids, wherein the phononic-sized features are filled with a second material different from the first material, wherein the first material comprises silicon, and wherein a thermal conductivity of the nanomesh phononic structure is greater than 1 W m−1 K−1 and less than or equal to 2 W m−1 K−1.