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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Polymeric ion functionalized graphite nanoplatelets with flowability
TL;DR: In this paper, a graphite nanoplatelet fluid (GNF) is obtained via a three-step procedure, involving acid intercalant-assisted ultrasonic exfoliation, covalent grafting with a charged polysiloxane quaternary ammonium salt (DC5700), and ion exchange with a poly(ethylene) glycol-functionalized sulfonate salt (NPES).
Journal ArticleDOI
In‐situ exfoliation and thermal conductivity in phase‐transition‐assisted melt blending fabrication of low‐density polyethylene/expanded graphite nanocomposite
Journal ArticleDOI
High Thermal Conductivity of Plasticine-Based Nanocomposites Developed Using Simple Fabrication for Heat Management in Electronic Devices
Syed Abdul Momin,Mariatti Jaafar +1 more
Proceedings ArticleDOI
Laser-assisted manufacturing of super-insulation materials
TL;DR: In this paper, a hollow glass micro-particle (HGMP) composite is fabricated in a composite level and the effect of laser treatment is examined for further improvement of thermal and mechanical properties.
Journal ArticleDOI
Heat Dissipation Material with Alumina Selectively Dispersed Using PS-PMMA Diblock Copolymer
Minguen Kim,Chang Park,Nam Ju Jo +2 more
TL;DR: In this article , a continuous heat transfer path was formed by selectively dispersing a thermally conductive filler using polystyrene-poly(methyl methacrylate) diblock copolymer and adding carbon nanotubes to an extent capable of maintaining electrical insulation to act as a heat transfer bridge between ceramic fillers.
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.