Significant reduction of graphene thermal conductivity by phononic crystal structure

Lina Yang; Jie Chen; Nuo Yang; Baowen Li

doi:10.1016/j.ijheatmasstransfer.2015.07.111

Significant reduction of graphene thermal conductivity by phononic crystal structure

Lina Yang, Jie Chen, Nuo Yang^*, Baowen Li

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

97 Citations (Scopus)

Abstract

We studied the thermal conductivity of graphene phononic crystal (GPnC), also named as graphene nanomesh, by molecular dynamics simulations. The dependence of thermal conductivity of GPnCs (κ_GPnC) on both length and temperature are investigated. It is found that the thermal conductivity of GPnCs is significantly lower than that of graphene (κ_G) and can be efficiently tuned by changing the porosity and period length. For example, the ratio κ_GPnC/κ_G can be changed from 0.1 to 0.01 when the porosity is changed from about 21% to 65%. It is also shown quantitatively that there are more states available for Umklapp three-phonon scatterings in GPnCs. The phonon participation ratio spectra reveal that more phonon modes are localized in GPnCs with larger porosity. Our results suggest that creating GPnCs is a valuable method to efficiently manipulate the thermal conductivity of graphene.

Original language	English
Pages (from-to)	428-432
Number of pages	5
Journal	International Journal of Heat and Mass Transfer
Volume	91
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2015.07.111
Publication status	Published - 17 Aug 2015
Externally published	Yes

Keywords

Graphene
Phononic crystal
Thermal conductivity

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10.1016/j.ijheatmasstransfer.2015.07.111

Cite this

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title = "Significant reduction of graphene thermal conductivity by phononic crystal structure",

abstract = "We studied the thermal conductivity of graphene phononic crystal (GPnC), also named as graphene nanomesh, by molecular dynamics simulations. The dependence of thermal conductivity of GPnCs (κGPnC) on both length and temperature are investigated. It is found that the thermal conductivity of GPnCs is significantly lower than that of graphene (κG) and can be efficiently tuned by changing the porosity and period length. For example, the ratio κGPnC/κG can be changed from 0.1 to 0.01 when the porosity is changed from about 21\% to 65\%. It is also shown quantitatively that there are more states available for Umklapp three-phonon scatterings in GPnCs. The phonon participation ratio spectra reveal that more phonon modes are localized in GPnCs with larger porosity. Our results suggest that creating GPnCs is a valuable method to efficiently manipulate the thermal conductivity of graphene.",

keywords = "Graphene, Phononic crystal, Thermal conductivity",

author = "Lina Yang and Jie Chen and Nuo Yang and Baowen Li",

year = "2015",

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doi = "10.1016/j.ijheatmasstransfer.2015.07.111",

language = "English",

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journal = "International Journal of Heat and Mass Transfer",

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TY - JOUR

T1 - Significant reduction of graphene thermal conductivity by phononic crystal structure

AU - Yang, Lina

AU - Chen, Jie

AU - Yang, Nuo

AU - Li, Baowen

PY - 2015/8/17

Y1 - 2015/8/17

N2 - We studied the thermal conductivity of graphene phononic crystal (GPnC), also named as graphene nanomesh, by molecular dynamics simulations. The dependence of thermal conductivity of GPnCs (κGPnC) on both length and temperature are investigated. It is found that the thermal conductivity of GPnCs is significantly lower than that of graphene (κG) and can be efficiently tuned by changing the porosity and period length. For example, the ratio κGPnC/κG can be changed from 0.1 to 0.01 when the porosity is changed from about 21% to 65%. It is also shown quantitatively that there are more states available for Umklapp three-phonon scatterings in GPnCs. The phonon participation ratio spectra reveal that more phonon modes are localized in GPnCs with larger porosity. Our results suggest that creating GPnCs is a valuable method to efficiently manipulate the thermal conductivity of graphene.

AB - We studied the thermal conductivity of graphene phononic crystal (GPnC), also named as graphene nanomesh, by molecular dynamics simulations. The dependence of thermal conductivity of GPnCs (κGPnC) on both length and temperature are investigated. It is found that the thermal conductivity of GPnCs is significantly lower than that of graphene (κG) and can be efficiently tuned by changing the porosity and period length. For example, the ratio κGPnC/κG can be changed from 0.1 to 0.01 when the porosity is changed from about 21% to 65%. It is also shown quantitatively that there are more states available for Umklapp three-phonon scatterings in GPnCs. The phonon participation ratio spectra reveal that more phonon modes are localized in GPnCs with larger porosity. Our results suggest that creating GPnCs is a valuable method to efficiently manipulate the thermal conductivity of graphene.

KW - Graphene

KW - Phononic crystal

KW - Thermal conductivity

UR - https://www.scopus.com/pages/publications/84939150334

U2 - 10.1016/j.ijheatmasstransfer.2015.07.111

DO - 10.1016/j.ijheatmasstransfer.2015.07.111

M3 - Article

AN - SCOPUS:84939150334

SN - 0017-9310

VL - 91

SP - 428

EP - 432

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

ER -

Significant reduction of graphene thermal conductivity by phononic crystal structure

Abstract

Keywords

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