Low Thermal Conductivity of Paperclip-Shaped Graphene Superlattice Nanoribbons

We design some graphene superlattice structures with ultra-low thermal conductivity 121 W//mK, which is only 6~ of the straight graphene nanoribbons. The thermal conductivity of graphene superlattice nanoribbons （GSNRs） is investigated by using molecular dynamics simulations. It is reported that the...

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Bibliographic Details
Published inChinese physics letters Vol. 32; no. 9; pp. 105 - 107
Main Author 陆星 钟伟荣
Format Journal Article
LanguageEnglish
Published 01.09.2015
Subjects
Graphene
Heat transfer
Nanostructure
Phonons
Simulation
Spectra
Superlattices
Thermal conductivity
分子动力学模拟
声子谱
导热系数
晶格热导率
石墨
纳米带
超晶格结构
针状
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Summary:We design some graphene superlattice structures with ultra-low thermal conductivity 121 W//mK, which is only 6~ of the straight graphene nanoribbons. The thermal conductivity of graphene superlattice nanoribbons （GSNRs） is investigated by using molecular dynamics simulations. It is reported that the thermal conductivity of graphene superlattiee nanoribbons is significantly lower than that of the straight graphene nanoribbons （GNRs）. Compared with the phonon spectra of straight GNRs, GSNRs have more forbidden bands. The overlap of phonon spectra between two supercells is shrinking.
Bibliography:We design some graphene superlattice structures with ultra-low thermal conductivity 121 W//mK, which is only 6~ of the straight graphene nanoribbons. The thermal conductivity of graphene superlattice nanoribbons （GSNRs） is investigated by using molecular dynamics simulations. It is reported that the thermal conductivity of graphene superlattiee nanoribbons is significantly lower than that of the straight graphene nanoribbons （GNRs）. Compared with the phonon spectra of straight GNRs, GSNRs have more forbidden bands. The overlap of phonon spectra between two supercells is shrinking.
LU Xing, ZHONG Wei-Rong（Department of Physics and Siyuan Laboratory, College of Science and Engineering, Jinan University, Guangzhou 510632）
11-1959/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/9/096501