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
Crosslinked acetylacetonated poly(vinyl alcohol-co-vinyl acetate) nanocomposites with graphene oxide and reduced graphene oxide: a new way to modify the property of nanocomposites
TL;DR: In this article, the acetoacetyl group was introduced into the polyvinyl alcohol (PVA) polymer chain, endowing PVA with the property of self-crosslinking.
Journal ArticleDOI
Size-controlled graphite nanoplatelets: thermal conductivity enhancers for epoxy resin
TL;DR: In this paper, a high-efficiency and low-cost method is developed to prepare graphite nanoplatelets (GNPs) with controlled size without destroying their crystal structure, and the results show that when the hybrid filler loading is 20% and the ratio of 20μm to 1.82μm GNPs is 17:3, the composite produces the optimal size synergistic effect and thermal conductivity reaches 1.33 W/m
Journal ArticleDOI
Thermal contact resistance of various carbon nanomaterial-based epoxy composites developed for thermal interface applications
Mohsin Ali Raza,Aidan Westwood +1 more
TL;DR: In this paper, the thermal contact resistance (TCR) of epoxy composites incorporating carbon nanotubes, graphite nanoplatelets (GNPs), few layered-graphene nanosheets (FLG) and carbon nanofibers have been extensively studied as fillers for the development of thermal interface adhesives or pastes due their high thermal conductivity.
Book ChapterDOI
Photochemical Behavior of Carbon Adsorbents
TL;DR: In this paper, the role of carbon adsorbents in photocatalysis is discussed and an overview of the photochemical response of carbon-containing catalysts and their efficiency for the degradation of different pollutants is presented.
Journal ArticleDOI
Thermal interface materials for cooling microelectronic systems: present status and future challenges
TL;DR: In this article, the assessment of contact resistance, properties of interface materials and thermal management of microelectronic devices using TIMs are discussed and the present status of TIMs is critically reviewed and the future challenges are highlighted.
References
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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
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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.