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
Ball-milled dispersed network of graphene platelets as thermal interface materials for high-efficiency heat dissipation of electronic devices
TL;DR: In this article, a facile and solid-state ball-milling method is adopted for the solvent-free reduction of exfoliated graphite nanoplatelets (EGNs) into high-quality Ball-milled Exfoliated Graphite Nanoplatelet (BMEGN) fillers, which are embedded and uniformly dispersed with polydimethylsiloxane (PDMS) matrix to make a highly stretchable BMEGN-embedded PDMS-TIMs with strongly enhanced thermal conductivity.
Computational Modeling of Percolation Conduction and Diffusion of Heterogeneous Materials
TL;DR: In this article, the authors presented several micro-structure modeling approaches to predict the effective properties of heterogeneous materials and demonstrated its certain application toward two highly heterogeneous, unconventional structural composite materials (carbon fiber reinforced composite materials and graphene nanoplatelets composite).
Proceedings ArticleDOI
Preparation of polymer-metal nanocomposite films and performance evaluation as thermal interface material
TL;DR: In this paper, the authors introduced and characterized the thermal performance of a nanostructured polymer-metal composite aimed at thermal interface material applications, which consists of a high porosity polymer nanofiber network infiltrated with a low melting temperature alloy, providing all-metal high thermally conductive pathways from surface to surface in assemblies.
Journal ArticleDOI
Latent Curing, Chemorheological, Kinetic, and Thermal Behaviors of Epoxy Resin Matrix for Prepregs
TL;DR: The thermal, rheological, and curing behaviors of epoxy resins are important for the impregnation of carbon fibers into the resin this article, and they are extensively exploited in a myriad of applications.
Dissertation
Multi-Layer-Graphene-nanoclay-epoxy nanocomposites : theory and experimentation
TL;DR: In this article, the influence of reinforcement morphology on the mechanical properties of epoxy nanocomposites was studied using two nano-fillers: Multi-Layer Graphene (MLG) and nanoclay.
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.