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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Enhanced thermal–mechanical properties of polymer composites with hybrid boron nitride nanofillers
TL;DR: In this article, the thermal properties of the epoxy composites with hybrid boron nitride nanotubes (BNNTs) and Boron Nitride nanosheets were investigated.
Journal ArticleDOI
Facile fabrication of large 3D graphene filler modified epoxy composites with improved thermal conduction and tribological performance
Helezi Zhou,Hongjian Wang,Xusheng Du,Yingyan Zhang,Huamin Zhou,Hong Yuan,Hong-Yuan Liu,Yiu-Wing Mai +7 more
TL;DR: In this article, a simple method to fabricate three-dimensional graphene fillers (3DGFs) modified epoxy resin (EP) composite was developed in order to preserve the advantages of the traditional 3D graphene foam structure.
Journal ArticleDOI
Thermal conductivity of composites with hybrid carbon nanotubes and graphene nanoplatelets
TL;DR: In this paper, an analytical model of the effective thermal conductivity in composites with hybrid carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) is presented by incorporating the percolation effect with an effective medium approach.
Journal ArticleDOI
Direct Ink Writing Technology (3D Printing) of Graphene-Based Ceramic Nanocomposites: A Review.
Nestor Washington Solis Pinargote,Anton Smirnov,Nikita Peretyagin,Anton Seleznev,Pavel Peretyagin +4 more
TL;DR: The AM processes used for 3D printing of graphene-based materials are described in more detail; moreover, some studies in a wide range of applications related to these AM techniques are cited.
Journal ArticleDOI
Aqueous preparation of polyethylene glycol/sulfonated graphene phase change composite with enhanced thermal performance
Hairong Li,Ming Jiang,Qi Li,Denian Li,Zongyi Chen,Waping Hu,Jing Huang,Xizhe Xu,Lijie Dong,Haian Xie,Chuanxi Xiong +10 more
TL;DR: A polyethylene glycol (PEG)/sulfonated graphene (SG) phase change composite with enhanced thermal performance was prepared by solution processing in aqueous medium as mentioned in this paper.
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.