NDLI: Graphene-based thermal modulators

Content Provider	Springer Nature Link
Author	Liu, Xiangjun Zhang, Gang Zhang, Yong Wei
Copyright Year	2015
Abstract	The quest for materials and devices that are capable of controlling heat flux continues to fuel research on thermal controlling devices. In this letter, using molecular dynamics simulations, we demonstrate that a partially clamped single-layer graphene can serve as a thermal modulator. The mismatch in phonon dispersion between the unclamped and clamped graphene sections results in phonon interface scattering, and the strength of interface scattering is tunable by controlling the clamp-graphene distance via applying the external pressure. Owing to the ultra-thin structure of graphene and its highly sensitive phonon dispersion to external physical interaction, the modulation efficiency—which is defined as the ratio of the highest to lowest heat flux—can reach as high as 150% at a moderate pressure of 50 GPa. This modulation efficiency can be further enhanced by arranging a number of clamps in series along the direction of the heat flux.
Starting Page	2755
Ending Page	2762
Page Count	8
File Format	PDF
ISSN	19980124
Journal	Nano Research
Volume Number	8
Issue Number	8
e-ISSN	19980000
Language	English
Publisher	Tsinghua University Press
Publisher Date	2015-08-29
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	graphene thermal modulator molecular dynamics thermal conductivity phonon dispersion Nanotechnology Materials Science Atomic/Molecular Structure and Spectra Condensed Matter Physics Biotechnology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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