Ultrahigh thermal isolation across heterogeneously layered two-dimensional materials.

ABSTRACT: Heterogeneous integration of nanomaterials has enabled advanced electronics and photonics applications. However, similar progress has been challenging for thermal applications, in part due to shorter wavelengths of heat carriers (phonons) compared to electrons and photons. Here, we demonstrate unusually high thermal isolation across ultrathin heterostructures, achieved by layering atomically thin two-dimensional (2D) materials. We realize artificial stacks of monolayer graphene, MoS₂, and WSe₂ with thermal resistance greater than 100 times thicker SiO₂ and effective thermal conductivity lower than air at room temperature. Using Raman thermometry, we simultaneously identify the thermal resistance between any 2D monolayers in the stack. Ultrahigh thermal isol

SUBMITTER: Vaziri S 

PROVIDER: S-EPMC6697438 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature