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Kim, Byeong-Su
Soft and Hybrid Nanomaterials Lab
Research Interests
  • Carbon materials, polymer, Layer-by-Layer (LbL) assembly, hyperbranched polymer, polyglycerol (PG), bio-applications

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Stable Aqueous Dispersion of Reduced Graphene Nanosheets via Non-Covalent Functionalization with Conducting Polymers and Application in Transparent Electrodes

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Title
Stable Aqueous Dispersion of Reduced Graphene Nanosheets via Non-Covalent Functionalization with Conducting Polymers and Application in Transparent Electrodes
Author
Jo, KiyoungLee, TaeminChoi, Hyun JungPark, Ju HyunLee, Dong JunLee, Dong WookKim, Byeong-Su
Keywords
Additional flexibilities; Aqueous dispersions; Aqueous suspensions; Chemical reduction; Colloidal Stability; Cooperative interactions; Electrostatic repulsion; Facile method; Graphene sheets; High conductivity; Hybrid film; Hybrid nanocomposites; Network structures; Non-covalent functionalization; PEDOT:PSS; Poly(styrene sulfonate); Potential applications; Transparent electrode
Issue Date
2011-03
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.27, no.5, pp.2014 - 2018
Abstract
We developed a simple and facile method of producing a stable aqueous suspension of reduced graphene oxide (RGO) nanosheets through the chemical reduction of graphene oxide in the presence of a conducting polymer dispersant, poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). This approach involves the cooperative interactions of strong pi-pi interactions between a two-dimensional graphene sheet and a rigid backbone of PEDOT and the intermolecular electrostatic repulsions between negatively charged PSS bound on the RGO sheets, which impart the colloidal stability of the resulting hybrid nanocomposite of RGO/PEDOT. Moreover, our one-step solution-based method allows preserving the intrinsic chemical and electronic properties of both components, yielding a hybrid film of RGO nanosheets of high conductivity of 2.3 k Omega/sq with a transmittance of 80%. By taking advantage of conducting network structure of conducting polymers which provides an additional flexibility and mechanical stability of RGO nanosheets, we demonstrate the potential application of hybrid RGO/PEDOT as highly flexible and transparent electrodes.
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DOI
10.1021/la104420p
ISSN
0743-7463
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