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Tailoring the thermal and electrical transport properties of graphene films by grain size engineering
Ma, Teng; Liu, Zhibo; Wen, Jinxiu; Gao, Yang; Ren, Xibiao; Chen, Huanjun; Jin, Chuanhong; Ma, Xiu-Liang; Xu, Ningsheng; Cheng, Hui-Ming; Ren, Wencai; Cheng, HM; Ren, WC (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-02-16
Source PublicationNATURE COMMUNICATIONS
ISSN2041-1723
Volume8Pages:-
AbstractUnderstanding the influence of grain boundaries (GBs) on the electrical and thermal transport properties of graphene films is essentially important for electronic, optoelectronic and thermoelectric applications. Here we report a segregation-adsorption chemical vapour deposition method to grow well-stitched high-quality monolayer graphene films with a tunable uniform grain size from similar to 200 nm to similar to 1 mu m, by using a Pt substrate with medium carbon solubility, which enables the determination of the scaling laws of thermal and electrical conductivities as a function of grain size. We found that the thermal conductivity of graphene films dramatically decreases with decreasing grain size by a small thermal boundary conductance of similar to 3.8 x 10(9) Wm(-2) K-1, while the electrical conductivity slowly decreases with an extraordinarily small GB transport gap of similar to 0.01 eV and resistivity of similar to 0.3 k Omega mu m. Moreover, the changes in both the thermal and electrical conductivities with grain size change are greater than those of typical semiconducting thermoelectric materials.; Understanding the influence of grain boundaries (GBs) on the electrical and thermal transport properties of graphene films is essentially important for electronic, optoelectronic and thermoelectric applications. Here we report a segregation-adsorption chemical vapour deposition method to grow well-stitched high-quality monolayer graphene films with a tunable uniform grain size from similar to 200 nm to similar to 1 mu m, by using a Pt substrate with medium carbon solubility, which enables the determination of the scaling laws of thermal and electrical conductivities as a function of grain size. We found that the thermal conductivity of graphene films dramatically decreases with decreasing grain size by a small thermal boundary conductance of similar to 3.8 x 10(9) Wm(-2) K-1, while the electrical conductivity slowly decreases with an extraordinarily small GB transport gap of similar to 0.01 eV and resistivity of similar to 0.3 k Omega mu m. Moreover, the changes in both the thermal and electrical conductivities with grain size change are greater than those of typical semiconducting thermoelectric materials.
description.department[ma, teng ; liu, zhibo ; gao, yang ; ma, xiu-liang ; cheng, hui-ming ; ren, wencai] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [wen, jinxiu ; chen, huanjun ; xu, ningsheng] sun yat sen univ, sch phys & engn, guangdong prov key lab display mat & technol, state key lab optoelect mat & technol, guangzhou 510275, guangdong, peoples r china ; [ren, xibiao ; jin, chuanhong] zhejiang univ, sch mat sci & engn, state key lab silicon mat, hangzhou 310027, zhejiang, peoples r china
Subject AreaMultidisciplinary Sciences
Funding OrganizationMinistry of Science and Technology of China [2016YFA0200101]; National Science Foundation of China [51325205, 51290273, 51521091, 51172240, 51222202]; Chinese Academy of Sciences [KGZD-EW-303-1, KGZD-EW-T06]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78288
Collection中国科学院金属研究所
Corresponding AuthorCheng, HM; Ren, WC (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Ma, Teng,Liu, Zhibo,Wen, Jinxiu,et al. Tailoring the thermal and electrical transport properties of graphene films by grain size engineering[J]. NATURE COMMUNICATIONS,2017,8:-.
APA Ma, Teng.,Liu, Zhibo.,Wen, Jinxiu.,Gao, Yang.,Ren, Xibiao.,...&Ren, WC .(2017).Tailoring the thermal and electrical transport properties of graphene films by grain size engineering.NATURE COMMUNICATIONS,8,-.
MLA Ma, Teng,et al."Tailoring the thermal and electrical transport properties of graphene films by grain size engineering".NATURE COMMUNICATIONS 8(2017):-.
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