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
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Emerging trends in graphene carbon based polymer nanocomposites and applications
TL;DR: In this paper, the authors mainly focused on recently emerging trends in synthesis and properties of graphene based polymer nanocomposites, in addition to brief discussion of some selected carbon based nan composites for application in electromagnetic interference shielding efficiency, terahertz shielding efficiency and electrostatic dissipation.
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Tuning the interface of graphene platelets/epoxy composites by the covalent grafting of polybenzimidazole
TL;DR: In this paper, a facile one-pot strategy for covalent functionalization of graphene platelets (GnPs) by polybenzimidazole, and the fabrication of their composites with epoxy resin was reported.
Journal ArticleDOI
Edge-functionalized graphene-like platelets as a co-curing agent and a nanoscale additive to epoxy resin
TL;DR: In this paper, an edge-selective functionalization of pristine graphite with 4-aminobenzoyl-functionalized graphite (AB-graphite) was applied for the synthesis of 4-AMB-functionalised graphite through a direct Friedel-Crafts acylation in a polyphosphoric acid (PPA)/phosphorus pentoxide medium (P2O5).
Journal ArticleDOI
Preparation of Boron Nitride Nanosheet/Nanofibrillated Cellulose Nanocomposites with Ultrahigh Thermal Conductivity via Engineering Interfacial Thermal Resistance
Jiajia Sun,Jiajia Sun,Yimin Yao,Xiaoliang Zeng,Guiran Pan,Guiran Pan,Jiantao Hu,Jiantao Hu,Yun Huang,Yun Huang,Rong Sun,Jianbin Xu,Ching-Ping Wong,Ching-Ping Wong +13 more
TL;DR: In this article, the authors proposed to construct nanoscale silver "bridges" between fillers to achieve a high thermal conductivity of 65.7 ± 3.0 W m−1 K−1, which is one order magnitude higher than those of conventional polymer-based composites.
Journal ArticleDOI
Revealing the erosion-corrosion performance of sphere-shaped morphology of nickel matrix nanocomposite strengthened with reduced graphene oxide nanoplatelets
Ghulam Yasin,Muhammad Junaid Anjum,Muhammad Uzair Malik,Muhammad Abubaker Khan,Waheed Qamar Khan,Muhammad Arif,Tahira Mehtab,Tuan Anh Nguyen,Yassine Slimani,Mohammad Tabish,Dilshad Ali,Yu Zuo +11 more
TL;DR: In this article, a nickel-metal matrix nanocomposite coating reinforced with reduced graphene oxide (rGO) platelets has been fabricated with an electrochemical deposition technique to investigate the potential to improve the surface properties.
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
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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.