Correction to Thickness-Dependent Thermal Conductivity of Encased Graphene and Ultrathin Graphite

Jang, Wanyoung; Chen, Z.; Bao, Wenzhong; Lau, Chun Ning; Dames, Chris

doi:10.1021/nl202062s

Cited by 3 publications

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“…For the pure graphene flake domain, the neighboring flake scattering effect limits α 1 to a great extent by phononsubstrate interaction. 4,8,9 The pure graphene flakes in GP present a negative thermal expansion coefficient at near RT according to the experiment and numerical calculations. 12 Huang et al studied the disorder-induced thermal contraction in functionalized graphene.…”

Section: Switch On By Temperature Reduction: Analyzed Using Thermal D...mentioning

confidence: 69%

“…The κ was measured to be about 600 W m −1 K −1 near RT, 8 which is 60%-88% lower compared to the κ of suspended graphene. Jang et al measured the κ of graphene and ultrathin graphite encased within silicon dioxide to be lower than 160 W m −1 K −1 at 310 K. 9 The top layer oxide deposition resulted in an extra 64% and 38% reduction in the κ of three-layered and four-layered graphene flakes compared to the supported samples. Pettes et al studied the influence of a polymeric residue on the κ of bilayer graphene.…”

Section: Introductionmentioning

confidence: 99%

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Switch on the high thermal conductivity of graphene paper

et al. 2016

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This work reports on the discovery of a high thermal conductivity (κ) switch-on phenomenon in high purity graphene paper (GP) when its temperature is reduced from room temperature down to 10 K. The κ after switch-on (1732 to 3013 W m −1 K −1 ) is 4-8 times that before switch-on. The triggering temperature is 245-260 K. The switch-on behavior is attributed to the thermal expansion mismatch between pure graphene flakes and impurity-embedded flakes. This is confirmed by the switch behavior of the temperature coefficient of resistance. Before switch-on, the interactions between pure graphene flakes and surrounding impurity-embedded flakes efficiently suppress phonon transport in GP. After switch-on, the structure separation frees the pure graphene flakes from the impurity-embedded neighbors, leading to a several-fold κ increase. The measured κ before and after switch-on is consistent with the literature reported κ values of supported and suspended graphene. By conducting comparison studies with pyrolytic graphite, graphene oxide paper and partly reduced graphene paper, the whole physical picture is illustrated clearly. The thermal expansion induced switch-on is feasible only for high purity GP materials. This finding points out a novel way to switch on/off the thermal conductivity of graphene paper based on substrate-phonon scattering.

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Section: Switch On By Temperature Reduction: Analyzed Using Thermal D...mentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Switch on the high thermal conductivity of graphene paper

et al. 2016

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Recent major advances and challenges in the emerging graphene-based nanomaterials in electrocatalytic fuel cell technology

et al. 2022

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Thermal conductivity analysis and applications of nanocellulose materials

Uetani

Hatori²

2017

Science and Technology of Advanced Materials

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In this review, we summarize the recent progress in thermal conductivity analysis of nanocellulose materials called cellulose nanopapers, and compare them with polymeric materials, including neat polymers, composites, and traditional paper. It is important to individually measure the in-plane and through-plane heat-conducting properties of two-dimensional planar materials, so steady-state and non-equilibrium methods, in particular the laser spot periodic heating radiation thermometry method, are reviewed. The structural dependency of cellulose nanopaper on thermal conduction is described in terms of the crystallite size effect, fibre orientation, and interfacial thermal resistance between fibres and small pores. The novel applications of cellulose as thermally conductive transparent materials and thermal-guiding materials are also discussed.

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Correction to Thickness-Dependent Thermal Conductivity of Encased Graphene and Ultrathin Graphite

Cited by 3 publications

References 0 publications

Switch on the high thermal conductivity of graphene paper

Switch on the high thermal conductivity of graphene paper

Recent major advances and challenges in the emerging graphene-based nanomaterials in electrocatalytic fuel cell technology

Thermal conductivity analysis and applications of nanocellulose materials

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