Controlling the thermal conductivity of multilayer graphene by strain

Abstract Straintronics is a new concept to enhance electronic device performances by strain for next-generation information sensors and energy-saving technologies. The lattice deformation in graphene can modulate the thermal conductivity because phonons are the main heat carriers. However, the devic...

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Autores principales:	Kaito Nakagawa, Kazuo Satoh, Shuichi Murakami, Kuniharu Takei, Seiji Akita, Takayuki Arie
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0e3571d2d1614cae978855e687a055ec
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spelling	oai:doaj.org-article:0e3571d2d1614cae978855e687a055ec2021-12-02T18:51:07ZControlling the thermal conductivity of multilayer graphene by strain10.1038/s41598-021-98974-x2045-2322https://doaj.org/article/0e3571d2d1614cae978855e687a055ec2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98974-xhttps://doaj.org/toc/2045-2322Abstract Straintronics is a new concept to enhance electronic device performances by strain for next-generation information sensors and energy-saving technologies. The lattice deformation in graphene can modulate the thermal conductivity because phonons are the main heat carriers. However, the device fabrication process affects graphene’s heat transport properties due to its high stretchability. This study experimentally investigates the change in the thermal conductivity when biaxial tensile strain is applied to graphene. To eliminate non-strain factors, two mechanisms are considered: pressure-induced and electrostatic attraction–induced strain. Raman spectroscopy and atomic force microscopy precisely estimate the strain. The thermal conductivity of graphene decreases by approximately 70% with a strain of only 0.1%. Such thermal conductivity controllability paves the way for applying graphene as high-efficiency thermal switches and diodes in future thermal management devices.Kaito NakagawaKazuo SatohShuichi MurakamiKuniharu TakeiSeiji AkitaTakayuki ArieNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kaito Nakagawa Kazuo Satoh Shuichi Murakami Kuniharu Takei Seiji Akita Takayuki Arie Controlling the thermal conductivity of multilayer graphene by strain
description	Abstract Straintronics is a new concept to enhance electronic device performances by strain for next-generation information sensors and energy-saving technologies. The lattice deformation in graphene can modulate the thermal conductivity because phonons are the main heat carriers. However, the device fabrication process affects graphene’s heat transport properties due to its high stretchability. This study experimentally investigates the change in the thermal conductivity when biaxial tensile strain is applied to graphene. To eliminate non-strain factors, two mechanisms are considered: pressure-induced and electrostatic attraction–induced strain. Raman spectroscopy and atomic force microscopy precisely estimate the strain. The thermal conductivity of graphene decreases by approximately 70% with a strain of only 0.1%. Such thermal conductivity controllability paves the way for applying graphene as high-efficiency thermal switches and diodes in future thermal management devices.
format	article
author	Kaito Nakagawa Kazuo Satoh Shuichi Murakami Kuniharu Takei Seiji Akita Takayuki Arie
author_facet	Kaito Nakagawa Kazuo Satoh Shuichi Murakami Kuniharu Takei Seiji Akita Takayuki Arie
author_sort	Kaito Nakagawa
title	Controlling the thermal conductivity of multilayer graphene by strain
title_short	Controlling the thermal conductivity of multilayer graphene by strain
title_full	Controlling the thermal conductivity of multilayer graphene by strain
title_fullStr	Controlling the thermal conductivity of multilayer graphene by strain
title_full_unstemmed	Controlling the thermal conductivity of multilayer graphene by strain
title_sort	controlling the thermal conductivity of multilayer graphene by strain
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0e3571d2d1614cae978855e687a055ec
work_keys_str_mv	AT kaitonakagawa controllingthethermalconductivityofmultilayergraphenebystrain AT kazuosatoh controllingthethermalconductivityofmultilayergraphenebystrain AT shuichimurakami controllingthethermalconductivityofmultilayergraphenebystrain AT kuniharutakei controllingthethermalconductivityofmultilayergraphenebystrain AT seijiakita controllingthethermalconductivityofmultilayergraphenebystrain AT takayukiarie controllingthethermalconductivityofmultilayergraphenebystrain
_version_	1718377427284000768

Controlling the thermal conductivity of multilayer graphene by strain

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