Back to Search
Start Over
Ultrahigh thermal isolation across heterogeneously layered two-dimensional materials
- Source :
- Science advances, 5(8):eaax1325. American Association for the Advancement of Science, Science Advances
- Publication Year :
- 2019
-
Abstract
- Demonstration of metamaterials with ultrahigh thermal resistance by phonon-level engineering of heterogeneous 2D monolayers.<br />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 isolation is achieved through the mismatch in mass density and phonon density of states between the 2D layers. These thermal metamaterials are an example in the emerging field of phononics and could find applications where ultrathin thermal insulation is desired, in thermal energy harvesting, or for routing heat in ultracompact geometries.
- Subjects :
- Materials science
Phonon
Astrophysics::High Energy Astrophysical Phenomena
Thermal resistance
Materials Science
Physics::Optics
02 engineering and technology
7. Clean energy
01 natural sciences
Condensed Matter::Materials Science
Thermal conductivity
Thermal insulation
Condensed Matter::Superconductivity
0103 physical sciences
Thermal
Monolayer
Research Articles
010302 applied physics
Multidisciplinary
business.industry
SciAdv r-articles
Metamaterial
Heterojunction
021001 nanoscience & nanotechnology
Condensed Matter::Soft Condensed Matter
Applied Sciences and Engineering
Optoelectronics
0210 nano-technology
business
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 23752548
- Volume :
- 5
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Science advances
- Accession number :
- edsair.doi.dedup.....74517386498d8d248e8309bff9f91174