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Conductivity Maximum in 3D Graphene Foams
Liu F(刘峰)1; Wang C(王超)1; Tang QH(汤奇恒)1,2
2018-08-09
发表期刊SMALL
卷号14期号:32页码:1801458
ISSN1613-6810
摘要

In conventional foams, electrical properties often play a secondary role. However, this scenario becomes different for 3D graphene foams (GrFs). In fact, one of the motivations for synthesizing 3D GrFs is to inherit the remarkable electrical properties of individual graphene sheets. Despite immense experimental efforts to study and improve the electrical properties of 3D GrFs, lack of theoretical studies and understanding limits further progress. The causes to this embarrassing situation are identified as the multiple freedoms introduced by graphene sheets and multiscale nature of this problem. In this article, combined with transport modeling and coarse-grained molecular dynamic (MD) simulations, a theoretical framework is established to systematically study the electrical conducting properties of 3D GrFs with or without deformation. In particular, through large-scale and massive calculations, a general relation between contact area and conductance for two van der Waals bonded graphene sheets is demonstrated, in terms of which the conductivity maximum phenomenon in GrFs is first theoretically proposed and its competition mechanism is explained. Moreover, the theoretical prediction is consistent with previous experimental observations.

关键词3d Graphene Foams Conductivity First Principle Md Simulations Strain
DOI10.1002/smll.201801458
收录类别SCI ; EI
语种英语
WOS记录号WOS:000441134400014
关键词[WOS]Chemical-vapor-deposition ; Layer Graphene ; Electronic Transport ; Spongy Graphene ; Poissons Ratio ; Large-area ; Aerogels ; Cvd ; Elasticity ; Ultralight
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
项目资助者National Natural Science Foundation of China(11602272 ; National Basic Research Program of China(2012CB937500) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040503) ; 11602270 ; 11790292 ; 11021262 ; 11172303 ; 11132011 ; 11532013)
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力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77653
专题非线性力学国家重点实验室
通讯作者Liu F(刘峰); Wang C(王超)
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Liu F,Wang C,Tang QH. Conductivity Maximum in 3D Graphene Foams[J]. SMALL,2018,14(32):1801458.
APA Liu F,Wang C,&Tang QH.(2018).Conductivity Maximum in 3D Graphene Foams.SMALL,14(32),1801458.
MLA Liu F,et al."Conductivity Maximum in 3D Graphene Foams".SMALL 14.32(2018):1801458.
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