Controlled oxidation level of reduced graphene oxides and its effect on thermoelectric properties

Jaeyoo Choi; Nguyen D.K. Tu; Sang Soo Lee; Hyunjung Lee; Jin Sang Kim; Heesuk Kim

doi:10.1007/s13233-014-2160-4

Controlled oxidation level of reduced graphene oxides and its effect on thermoelectric properties

Jaeyoo Choi, Nguyen D.K. Tu, Sang Soo Lee, Hyunjung Lee, Jin Sang Kim, Heesuk Kim

KU-KIST Graduate School of Converging Science and Technology

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

We investigated the thermoelectric properties of reduced graphene oxide (rGO) as a function of the oxidation level of rGO. rGO among graphene derivatives was selected as a thermoelectric material since rGO bucky paper shows low thermal conductivity due to the phonon scattering at the junctions of rGO nanoplatelets. The oxdation level of rGO was controlled by differing the amount of chemical reductant (hydrazine) used to reduce graphene oxide (GO) to rGO, which correspondingly affected the electrical conductivity and Seebeck coefficient of rGO film. In this study, the maximum of figure of merit (ZT) was found to reach to 1.1×10⁻⁴ at 298 K for rGO reduced with the hydrazine of 1000 μL. These results provide the first experimental evidence that the thermoelectric performance of graphene and its derivative can be controlled by the oxidation level of graphitic nanoplatelets.

[Figure not available: see fulltext.].

Original language	English
Pages (from-to)	1104-1108
Number of pages	5
Journal	Macromolecular Research
Volume	22
Issue number	10
DOIs	https://doi.org/10.1007/s13233-014-2160-4
Publication status	Published - 2014 Oct 17

Keywords

oxidation level
reduced graphene oxide
thermoelectric properties

ASJC Scopus subject areas

Chemical Engineering(all)
Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1007/s13233-014-2160-4

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title = "Controlled oxidation level of reduced graphene oxides and its effect on thermoelectric properties",

abstract = "We investigated the thermoelectric properties of reduced graphene oxide (rGO) as a function of the oxidation level of rGO. rGO among graphene derivatives was selected as a thermoelectric material since rGO bucky paper shows low thermal conductivity due to the phonon scattering at the junctions of rGO nanoplatelets. The oxdation level of rGO was controlled by differing the amount of chemical reductant (hydrazine) used to reduce graphene oxide (GO) to rGO, which correspondingly affected the electrical conductivity and Seebeck coefficient of rGO film. In this study, the maximum of figure of merit (ZT) was found to reach to 1.1×10−4 at 298 K for rGO reduced with the hydrazine of 1000 μL. These results provide the first experimental evidence that the thermoelectric performance of graphene and its derivative can be controlled by the oxidation level of graphitic nanoplatelets.[Figure not available: see fulltext.].",

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AU - Choi, Jaeyoo

AU - Tu, Nguyen D.K.

AU - Lee, Sang Soo

AU - Lee, Hyunjung

AU - Kim, Jin Sang

AU - Kim, Heesuk

PY - 2014/10/17

Y1 - 2014/10/17

N2 - We investigated the thermoelectric properties of reduced graphene oxide (rGO) as a function of the oxidation level of rGO. rGO among graphene derivatives was selected as a thermoelectric material since rGO bucky paper shows low thermal conductivity due to the phonon scattering at the junctions of rGO nanoplatelets. The oxdation level of rGO was controlled by differing the amount of chemical reductant (hydrazine) used to reduce graphene oxide (GO) to rGO, which correspondingly affected the electrical conductivity and Seebeck coefficient of rGO film. In this study, the maximum of figure of merit (ZT) was found to reach to 1.1×10−4 at 298 K for rGO reduced with the hydrazine of 1000 μL. These results provide the first experimental evidence that the thermoelectric performance of graphene and its derivative can be controlled by the oxidation level of graphitic nanoplatelets.[Figure not available: see fulltext.].

AB - We investigated the thermoelectric properties of reduced graphene oxide (rGO) as a function of the oxidation level of rGO. rGO among graphene derivatives was selected as a thermoelectric material since rGO bucky paper shows low thermal conductivity due to the phonon scattering at the junctions of rGO nanoplatelets. The oxdation level of rGO was controlled by differing the amount of chemical reductant (hydrazine) used to reduce graphene oxide (GO) to rGO, which correspondingly affected the electrical conductivity and Seebeck coefficient of rGO film. In this study, the maximum of figure of merit (ZT) was found to reach to 1.1×10−4 at 298 K for rGO reduced with the hydrazine of 1000 μL. These results provide the first experimental evidence that the thermoelectric performance of graphene and its derivative can be controlled by the oxidation level of graphitic nanoplatelets.[Figure not available: see fulltext.].

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Controlled oxidation level of reduced graphene oxides and its effect on thermoelectric properties

Abstract

Keywords

ASJC Scopus subject areas

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