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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Journal ArticleDOI
Effect of primary particle size and aggregate size of modified graphene oxide on toughening of unsaturated polyester resin
Book ChapterDOI
Thermal Conduction Behavior of Graphene and Graphene–Polymer Composites
Faisal Shahzad,Faisal Shahzad,Syed Dildar Haider Naqvi,Syed Dildar Haider Naqvi,Chong Min Koo,Chong Min Koo,Chong Min Koo +6 more
TL;DR: In this article, a comprehensive overview of the most recent advances on the factors that influence the thermal conductivity of graphene and graphene base polymer composites is presented, where the effects of processing conditions, measurement methods, graphene sheet size, grain size, edges, defects, sheet orientation, covalent or non-covalent functionalization and novel architectures are discussed.
Journal ArticleDOI
Thermophysical Properties of Carbon-Carbon Materials Based on Graphite Foam
A. S. Tikhomirov,Natalya E. Sorokina,Artem P. Malakho,O. N. Shornikova,S. V. Filimonov,V. V. Avdeev +5 more
TL;DR: In this article, laser flashing and thermal analysis are used to determine thermal conductivity and linear thermal expansion coefficient of low density carbon-carbon materials based on two types of graphite foam differing in degree of graphitic matrix defectiveness, and pyrocarbon.
Journal ArticleDOI
Platelet Composite Coatings for Tin Whisker Mitigation
TL;DR: In this article, the authors report tin-penetration resistance of the coatings was evaluated at elevated temperature and high humidity and under temperature cycling conditions, and found that the platelet composites have enhanced thermal conductivity and dielectric constant compared with unfilled polymers.
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.