Tailoring the thermal and electrical transport properties of graphene films by grain size engineering

IMR OpenIR

	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
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	8 页码:-
摘要	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.; 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.
部门归属	[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
学科领域	Multidisciplinary Sciences
资助者	Ministry 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]
收录类别	SCI
语种	英语
WOS记录号	WOS:000394226500001
引用统计	被引频次：210[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78288
专题	中国科学院金属研究所
通讯作者	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.
推荐引用方式 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):-.