Showing papers in "Carbon in 2010"

TL;DR: In this paper, a dielectric spectroscopy of short carbon fiber/silica composite in the frequency range from 8.2 to 12.4 GHz at temperatures between 30 and 600°C has been performed.

TL;DR: In this paper, the evolution of the intensity ratio between the G band (1585 cm−1) and the disorder-induced D band (1345 cm −1) with ion dose is determined, providing a spectroscopy-based method to quantify the density of defects in graphene.

TL;DR: Pei, Songfeng, Zhao, Jinping, Du, Jinhong, Ren, Wencai, Cheng, Hui-Ming as discussed by the authors, JHdu et al.

TL;DR: In this paper, the most promising and appealing properties of graphene are summarized from an exponentially growing literature, with a particular attention to matching production methods to characteristics and to applications, including the high carrier mobility value in suspended and annealed samples for electronic devices, the thickness-dependent optical transparency and, in the mechanical section, the high robustness and full integration of graphene in sensing device applications, emphasizing on the high potential of graphene not only as a post-silicon materials for CMOS device application but more ambitiously as a platform for post-CMOS molecular architecture in

TL;DR: In this paper, a self-limiting deposition of nanoscale MnO2 on the surface of graphene under microwave irradiation was proposed to synthesize graphene-MnO2 composites.

TL;DR: In this paper, a graphene nanosheet (GNS)/polyaniline (PANI) composite was synthesized using in situ polymerization and the morphology and microstructure of samples were examined by scanning electron microscopy (SEM), TEM, X-ray diffraction (XRD), and Raman spectroscopy.

TL;DR: In this article, a mild thermal reduction of graphene oxide (GO) to graphene was achieved with the assistance of microwaves in a mixed solution of N,N-dimethylacetamide and water (DMAc/H2O).

TL;DR: In this article, a simple approach for the deposition of platinum (Pt) nanoparticles onto surfaces of graphite oxide (GO) nanosheets with particle size in the range of 1-5 nm by ethylene glycol reduction was investigated.

TL;DR: In this paper, a simple yet versatile method to simultaneously achieve the exfoliation and reduction of graphite oxide was proposed, which was shown to achieve specific capacitance values as high as 191 F/g with KOH electrolyte.

TL;DR: In this paper, an improved three-dimensional statistical resistor network model incorporating the tunneling effect between the neighbouring nanotubes, and a fiber reorientation model was used to understand the effects of processing parameters and material properties on sensor sensitivity in polymer/carbon nanotube composite sensors.

TL;DR: In this article, five nanoporous carbons (NPCs) were prepared by polymerizing and then carbonizing carbon precursor of furfuryl alcohol accommodated in a porous metal-organic framework (MOF-5, [Zn4O(bdc)3], bdc = 1,4-benzenedicarboxylate) template.

TL;DR: In this article, an environmentally friendly and efficient route for the reduction of graphene oxide by aluminum powder in only 30min was demonstrated. But this method was not suitable for the case of high temperature.

TL;DR: In this article, the performance of Pt and Pt-Ru nanoparticles was investigated for methanol and ethanol oxidation in comparison to the widely used Vulcan XC-72R carbon black catalyst supports.

TL;DR: Graphene nanosheet/carbon black composites were prepared by the ultrasonication and in situ reduction methods as mentioned in this paper, and the resulting composite is a promising carbon material for supercapacitors.

TL;DR: In this paper, the methods of CO 2 expulsion and endpoint determination for the Boehm titration were standardized, and it was found that to minimize errors both the NaOH titrant and HCl should be standardized prior to titration and that a back-titration is preferable for all three reaction bases.

TL;DR: In this paper, the surface, interfacial and dispersion properties of carbon nanotubes (CNTs), and the mechanical properties of the CNT/epoxy composites affected by CNT functionalization are investigated.

TL;DR: Graphene thin films with very low concentration of oxygen-containing functional groups were produced by reduction of graphene oxide nanosheets (prepared by using a chemical exfoliation) in a reducing environment and using two different heat treatment procedures.

TL;DR: In this article, a comprehensive overview of the experimental and theoretical topics related to the introduction of nitrogen into both single and multi-walled carbon nanotube structures is provided, and a comparison with other nitrogen-doped carbon systems is also provided.

TL;DR: In this paper, high oxygen content (10−15% at.%) nanotextured carbons were obtained by pyrolysis of seaweeds at 600−750°C and applied as electrodes for supercapacitors in H2SO4, KOH and Na2SO 4 aqueous media.

TL;DR: In this article, the Young's modulus, tensile strength, and fracture strain of functionalized graphene deteriorate with increasing H-coverage up to about 30% and beyond this limit, the mechanical properties remain insensitive to Hcoverage, and they show that this drastic deterioration in mechanical strength arises both from the conversion of sp 2 to sp 3 bonding and due to easy rotation of unsupported sp 3 bonds.

TL;DR: In this paper, a two-step process was used to construct a hybrid of graphene oxide nanosheets and surface modified Fe 3 O 4 nanoparticles (NPs) using tetraethyl orthosilicate and triethoxysilane to introduce amino groups on its surface.

TL;DR: A highly effective hydroxylated functionalization of carbon fibres for use as electrodes of allvanadium redox flow battery (VRFB) was developed in this article, where carbon paper made of carbon fiber was hydroxlyated ultrasonically with mixed acids (H2SO4/HNO3, V H 2 SO 4 /V HNO 3 ǫ = 3/1) in a Teflon-lined stainless steel autoclave for different time at 80°C.

TL;DR: In this paper, the morphology and structure of the graphene powder sample was studied using scanning electron microscopy, transmission electron microscope, X-ray diffraction and Raman spectroscopy.

TL;DR: In this article, the biocompatibility of large single layer graphene produced by chemical vapour deposition was investigated using human osteoblasts and mesenchymal stromal cells.

TL;DR: In this article, N-doped multi-layered graphene sheets were synthesized in large scale by the method of direct current arc-discharge between pure graphite rods.

TL;DR: In this paper, Nitrogen-doped carbons were produced using hydrothermal carbonization of nitrogen-containing carbohydrates under mild temperature (180 °C) and the resulting materials contain significant amounts of nitrogen and display a high degree of aromatization.

TL;DR: In this article, the electrical, mechanical and optical properties of few-layer graphene (FLG) synthesized by chemical vapor deposition (CVD) on a Ni-coated substrate were studied.

TL;DR: In this article, Nitrogen doped carbon nanotubes (N-CNTs) with different nitrogen contents were synthesized as non-precious catalysts for oxygen reduction reaction (ORR) through varying the relative amount of pyridine and ethanol in the stock solution.

TL;DR: In this article, a floating catalyst chemical vapor deposition method was employed to effectively control nitrogen content within the carbon nanotubes and modulate their structure, showing that the inner structure of CNTs displayed a regular morphology transition from straight and smooth walls (0.% nitrogen) to cone-stacked shapes or bamboo-like structure (1.5%), then to corrugated structures (3.1% and above).

TL;DR: In this paper, several kinds of porous carbons were easily prepared by using metal-organic framework as both template and carbon precursor, and the carbon materials were further activated by potassium hydroxide (KOH).