Journal ArticleDOI
Electrorheology of Graphene Oxide
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TLDR
Novel polarizable graphene oxide particles with oxidized groups on their edge and basal planes were prepared by a modified Hummers method, and their electro-responsive electrorheological (ER) characteristics when dispersed in silicone oil were examined with and without an electric field applied.Abstract:
Novel polarizable graphene oxide (GO) particles with oxidized groups on their edge and basal planes were prepared by a modified Hummers method, and their electro-responsive electrorheological (ER) characteristics when dispersed in silicone oil were examined with and without an electric field applied. The fibrillation phenomenon of this GO-based electro-responsive fluid was also observed via an optical microscope under an applied electric field. Both flow curves and dielectric spectra of the ER fluid were measured using a rotational rheometer and a LCR meter, respectively. Its viscoelastic properties of both storage and loss moduli were also examined using a vertical oscillation rheometer equipped with a high voltage generator, finding that the GO-based smart ER system behaves as a viscoelastic material under an applied electric field.read more
Citations
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Photocatalytic Synthesis of TiO2 and Reduced Graphene Oxide Nanocomposite for Lithium Ion Battery
TL;DR: The electrochemical and materials characterization suggest that the graphene network provides efficient pathways for electron transfer, and the TiO2 nanoparticles prevent the restacking of the graphene nanosheets, resulting in the improvement in both electric conductivity and specific capacity, respectively.
Photocatalytic Synthesis of TiO 2 and Reduced Graphene Oxide Nanocomposite for Lithium Ion Battery
TL;DR: In this paper, the improved Hummers' oxidation method was used to synthesize graphene oxide (GO), which was photocatalytically reduced under UV illumination, leading to the production of anode materials for lithium ion batteries.
Journal ArticleDOI
Exceptional dielectric properties of chlorine-doped graphene oxide/poly (vinylidene fluoride) nanocomposites
TL;DR: In this article, a facile method to significantly enhance the dielectric performance of reduced graphene oxide-based polymer composites was reported, and the composites reinforced with a very low reduced reduced chlorinated GO (Cl-rGO) content of 0.2
Journal ArticleDOI
Recent progress in the growth and applications of graphene as a smart material: a review
TL;DR: In this article, the authors highlight the most important experimental results on the synthesis of graphene material, its emerging properties with reference to its smart applications, and discuss the possibility to successfully integrate graphene directly into device, enabling thereby the realization of a wide range of applications, including actuation, photovoltaic, thermoelectricity, shape memory, self-healing, electrorheology and space missions.
Journal ArticleDOI
Recent development of electro-responsive smart electrorheological fluids
TL;DR: This perspective reports the latest ER materials along with their rheological understanding and provides a forward-looking summary of the potential future applications of ER technology.
References
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Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
Sasha Stankovich,Dmitriy A. Dikin,Richard D. Piner,Kevin A. Kohlhaas,Alfred Kleinhammes,Yuanyuan Jia,Yue Wu,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: In this paper, a colloidal suspension of exfoliated graphene oxide sheets in water with hydrazine hydrate results in their aggregation and subsequent formation of a high surface area carbon material which consists of thin graphene-based sheets.
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Superior Thermal Conductivity of Single-Layer Graphene
Alexander A. Balandin,Suchismita Ghosh,Wenzhong Bao,Irene Calizo,Desalegne Teweldebrhan,Feng Miao,Chun Ning Lau +6 more
TL;DR: The extremely high value of the thermal conductivity suggests that graphene can outperform carbon nanotubes in heat conduction and establishes graphene as an excellent material for thermal management.
Journal ArticleDOI
Experimental observation of the quantum Hall effect and Berry's phase in graphene
TL;DR: In this paper, an experimental investigation of magneto-transport in a high-mobility single layer of Graphene is presented, where an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene is observed.
Journal Article
Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
TL;DR: An experimental investigation of magneto-transport in a high-mobility single layer of graphene observes an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene.
Journal ArticleDOI
Single Sheet Functionalized Graphene by Oxidation and Thermal Expansion of Graphite
Michael J. McAllister,Je-Luen Li,Douglas H. Adamson,Hannes C. Schniepp,Ahmed Abdala,Jun-Jun Liu,Margarita Herrera-Alonso,David L. Milius,Roberto Car,Robert K. Prud'homme,Ilhan A. Aksay +10 more
TL;DR: In this article, a detailed analysis of the thermal expansion mechanism of graphite oxide to produce functionalized graphene sheets is provided, where it is shown that the decomposition rate of the epoxy and hydroxyl sites exceeds the diffusion rate of evolved gases, yielding pressures that exceed the van der Waals forces holding the graphene sheets together.