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dc.contributor.authorMa, T
dc.contributor.authorLiu, Z
dc.contributor.authorWen, J
dc.contributor.authorGao, Y
dc.contributor.authorRen, X
dc.contributor.authorChen, H
dc.contributor.authorJin, C
dc.contributor.authorMa, X-L
dc.contributor.authorXu, N
dc.contributor.authorCheng, H-M
dc.contributor.authorRen, W
dc.date.accessioned2020-12-18T03:58:39Z
dc.date.available2020-12-18T03:58:39Z
dc.date.issued2017-02-16
dc.identifierpii: ncomms14486
dc.identifier.citationMa, T., Liu, Z., Wen, J., Gao, Y., Ren, X., Chen, H., Jin, C., Ma, X. -L., Xu, N., Cheng, H. -M. & Ren, W. (2017). Tailoring the thermal and electrical transport properties of graphene films by grain size engineering. NATURE COMMUNICATIONS, 8 (1), https://doi.org/10.1038/ncomms14486.
dc.identifier.issn2041-1723
dc.identifier.urihttp://hdl.handle.net/11343/256002
dc.description.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 ∼200 nm to ∼1 μm, 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 ∼3.8 × 109 W m-2 K-1, while the electrical conductivity slowly decreases with an extraordinarily small GB transport gap of ∼0.01 eV and resistivity of ∼0.3 kΩ μm. Moreover, the changes in both the thermal and electrical conductivities with grain size change are greater than those of typical semiconducting thermoelectric materials.
dc.languageEnglish
dc.publisherNATURE PUBLISHING GROUP
dc.titleTailoring the thermal and electrical transport properties of graphene films by grain size engineering
dc.typeJournal Article
dc.identifier.doi10.1038/ncomms14486
melbourne.affiliation.departmentElectrical and Electronic Engineering
melbourne.source.titleNature Communications
melbourne.source.volume8
melbourne.source.issue1
dc.rights.licenseCC BY
melbourne.elementsid1304296
melbourne.contributor.authorGao, Yang
dc.identifier.eissn2041-1723
melbourne.accessrightsOpen Access


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