Journal ArticleDOI
Graphite Nanoplatelet−Epoxy Composite Thermal Interface Materials
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TLDR
In this article, the performance of a few graphene layer n ∼ 4, with a thickness of ∼ 2 nm, was investigated for epoxy composites and it was shown that the G4 GNPs provide a thermal conductivity enhancement of more than 3000% (loading of ∼25 vol %).Abstract:
Natural graphite was intercalated, thermally exfoliated, and dispersed in acetone to prepare graphite nanoplatelets (GNPs, Gn) of controlled aspect ratio. Thermal conductivity measurements indicate that few graphene layer Gn, where n ∼ 4, with a thickness of ∼2 nm function as a very efficient filler for epoxy composites. When embedded in an epoxy matrix, the G4 GNPs provide a thermal conductivity enhancement of more than 3000% (loading of ∼25 vol %), and a thermal conductivity κ = 6.44 W/mK, which surpasses the performance of conventional fillers that require a loading of ∼70 vol % to achieve these values. We attribute the outstanding thermal properties of this material to a favorable combination of the high aspect ratio, two-dimensional geometry, stiffness, and low thermal interface resistance of the GNPs.read more
Citations
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Graphene-Based Polymer Composites and Their Applications
Tapan K. Das,Smita Prusty +1 more
TL;DR: In this article, the development of graphene-based polymer composites and their applications in different fields such as electronics devices, energy storage, sensors, ESD and EMI shielding and biomedical applications are discussed.
Journal ArticleDOI
Synthesis of enhanced hydrophilic and hydrophobic graphene oxide nanosheets by a solvothermal method
TL;DR: In this paper, the hydrophilic affinity of graphene oxide nanosheets can be significantly increased by reacting with allylamine, which can be used as additive in polymer-based composites and other functional applications.
Journal ArticleDOI
In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites
Saswata Bose,Tapas Kuila,Md. Elias Uddin,Nam Hoon Kim,Alan K.T. Lau,Alan K.T. Lau,Joong Hee Lee +6 more
TL;DR: In this paper, a polypyrrole (PPy)/graphene (GR) nanocomposites were successfully prepared via in-situ polymerization of graphite oxide (GO) and pyrrole monomer followed by chemical reduction using hydrazine monohydrate.
Journal ArticleDOI
Improved hydrophilicity, permeability, antifouling and mechanical performance of PVDF composite ultrafiltration membranes tailored by oxidized low-dimensional carbon nanomaterials
Jiguo Zhang,Zhiwei Xu,Wei Mai,Chunying Min,Baoming Zhou,Mingjing Shan,Yang Li,Caiyun Yang,Zhen Wang,Xiaoming Qian +9 more
TL;DR: In this article, a ternary mixture of polyvinylidene fluoride (PVDF), oxidized carbon nanotubes (OMWCNTs), PVDF-graphene oxide (GO), and PVDF−OwCNTs-GO composite ultrafiltration membranes were prepared by solution-blending with phase inversion method.
Journal ArticleDOI
Recent advance in functionalized graphene/ polymer nanocomposites
Dongyu Cai,Mo Song +1 more
TL;DR: The development of functionalized graphene (FG) has been growing very fast in the last five years as discussed by the authors, and it seems a suitable time to highlight the recent advances in this field and understand the developing direction of this new member of PNCs.
References
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Journal ArticleDOI
Two-dimensional gas of massless Dirac fermions in graphene
Kostya S. Novoselov,A. K. Geim,Sergey V. Morozov,Da Jiang,Mikhail I. Katsnelson,Irina V. Grigorieva,S. V. Dubonos,A. A. Firsov +7 more
TL;DR: This study reports an experimental study of a condensed-matter system (graphene, a single atomic layer of carbon) in which electron transport is essentially governed by Dirac's (relativistic) equation and reveals a variety of unusual phenomena that are characteristic of two-dimensional Dirac fermions.
Journal ArticleDOI
Graphene-based composite materials
Sasha Stankovich,Dmitriy A. Dikin,Geoffrey Dommett,K. Kohlhaas,Eric Zimney,Eric A. Stach,Richard D. Piner,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: The bottom-up chemical approach of tuning the graphene sheet properties provides a path to a broad new class of graphene-based materials and their use in a variety of applications.
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
Electronic Confinement and Coherence in Patterned Epitaxial Graphene
Claire Berger,Claire Berger,Zhimin Song,Xuebin Li,Xiaosong Wu,Nate Brown,Cécile Naud,Didier Mayou,Tianbo Li,J. Hass,Alexei Marchenkov,Edward H. Conrad,Phillip N. First,Walt A. de Heer,Walt A. de Heer +14 more
TL;DR: In this paper, a single epitaxial graphene layer at the silicon carbide interface is shown to reveal the Dirac nature of the charge carriers, and all-graphene electronically coherent devices and device architectures are envisaged.