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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An electrochemical dopamine aptasensor incorporating silver nanoparticle, functionalized carbon nanotubes and graphene oxide for signal amplification.
TL;DR: Sensitive quantitative detection of DA was carried out by monitoring the decrease of differential pulse voltammetric responses of AgNPs/CNTs/GO nanocomposite toward H2O2 oxidation.
Journal ArticleDOI
Preparation of graphene modified epoxy resin with high thermal conductivity by optimizing the morphology of filler
Yunfei Sun,Yunfei Sun,Bo Tang,Weiqiu Huang,Shuli Wang,Zhengwei Wang,Xiaobin Wang,Yuejin Zhu,Chongben Tao +8 more
TL;DR: In this paper, reduced graphene oxide (RGO) modified epoxy resin with identical mass fraction of filler display varied thermal conductivities in previous reports, leading to the absence of an unified standard to judge the ability of RGO acting as a thermal conductive filler.
Journal ArticleDOI
Improvement of the thermal conductivity and friction performance of poly(ether ether ketone)/carbon fiber laminates by addition of graphene
TL;DR: In this article, the effect of the GE on the morphology, thermal conductivity, friction performance, thermal and mechanical properties of composites was investigated, which showed that the GE was uniformly distributed in matrix-rich regions.
Journal ArticleDOI
Functionalization enhancement on interfacial shear strength between graphene and polyethylene
TL;DR: In this paper, a pull-out process was simulated to investigate the interfacial mechanical properties between the functionalized graphene sheet (FGS) and polyethylene (PE) matrix by using molecular dynamics simulation with ReaxFF reactive force field.
Journal ArticleDOI
Composite materials combining multiple luminescent MOFs and superparamagnetic microparticles for ratiometric water detection
Tobias Wehner,Marcel T. Seuffert,Jens R. Sorg,Michael Schneider,Karl Mandel,Gerhard Sextl,Gerhard Sextl,Klaus Müller-Buschbaum +7 more
TL;DR: In this paper, the combination of MOFs, which contain different luminescence centers combined with a different sensitivity towards water, results in a system that can be exploited as a ratiometric sensor.
References
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Journal ArticleDOI
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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.