Structure and physical properties of nanoclustered graphene synthesized from C60 fullerene under high pressure and high temperature

Chernogorova, O. P.; Potapova, I. N.; Drozdova, E. I.; Сиротинкин, В. П.; Солдатов, А. В.; Vasiliev, Alexander L.; Екимов, Е. А.

doi:10.1063/1.4863470

Cited by 35 publications

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“…The experimental technique at high pressures was described in detail in [6]. The sample synthesis parameters correspond to the condi tions of collapse of fullerene molecules with the for mation of a hard carbon phase [7][8][9].…”

Section: Methodsmentioning

confidence: 99%

Electrical-contact properties of a composite material with a copper matrix reinforced by superelastic hard carbon

et al. 2015

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The electrical contact resistance and the electric erosion wear resistance of the composite mate rial consisting of a copper matrix reinforced by superelastic hard carbon are studied. The reinforcing of CM by carbon particles, which have a unique combination of mechanical properties (high microhardness of 30-35 GPa, elastic modulus of 180-200 GPa, and a high ratio of microhardness to elastic modulus (HV 50 /E > 0.15)), ensures good contact characteristics of the material. The minimum electrical contact resistance of CM is comparable with the electrical contact resistance of a reference sample made of gold. The electric erosion wear resistance of the CM is more than threefold that of chrome bronze, which is a widely used for high cur rent electrical contacts.

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Section: Methodsmentioning

confidence: 99%

Electrical-contact properties of a composite material with a copper matrix reinforced by superelastic hard carbon

et al. 2015

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“…These clusters consist of disordered sp 2 carbon atoms along with some sp 3 -hybridized carbon. 580 The transformations between carbon nanoallotropes observed so far are schematically depicted in Figure 82, highlighting the change in dimensionalities.…”

Section: Interconversions Of Carbonmentioning

confidence: 98%

Broad Family of Carbon Nanoallotropes: Classification, Chemistry, and Applications of Fullerenes, Carbon Dots, Nanotubes, Graphene, Nanodiamonds, and Combined Superstructures

et al. 2015

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CONTENTS 1. Introduction 4745 2. Classification of Carbon Nanoallotropes: Structural Description and Characterization 4746 2.1. 0D Carbon Nanoallotropes 4746 2.1.1.Fullerenes and Onion-like Carbon 4746 2.1.2. Carbon Dots 4747 2.1.3. Graphene Quantum Dots 4748 2.1.4. Nanodiamonds 4749 2.2. 1D Carbon Nanoallotropes 4749 2.2.1. Carbon Nanotubes and Nanofibers 4749 2.2.2. Carbon Nanohorns 4750 2.3. 2D Carbon Nanoallotropes 4751 2.3.1. Graphene 4751 2.3.2. Multilayer Graphitic Nanosheets 4752 2.3.3. Graphene Nanoribbons 4754 3. Methods for Preparing Carbon Nanostructures 4754 3.1. 0D Carbon Nanoallotropes 4754 3.1.1. Fullerenes and Onion-like Carbon 4754 3.1.2. Carbon Dots 4755 3.1.3. Graphene Quantum Dots 4757 3.1.4. Nanodiamonds 4760 3.2. 1D Carbon Nanoallotropes 4761 3.2.1. Carbon Nanotubes and Nanofibers 4761 3.2.2. Carbon Nanohorns 4762 3.3. 2D Carbon Nanoallotropes 4762 3.3.1. Graphene 4762 3.3.2. Multilayer Graphitic Nanosheets 4763 3.3.3. Graphene Nanoribbons 4763 4. Fundamental Physicochemical Properties of Carbon Nanoallotropes 4764 4.1. Fundamental Properties of C 60 4764 4.2. Photoluminescence of Carbon Dots and Graphene Quantum Dots 4.3. Fundamental Properties of Nanodiamonds 4.4. Mechanical Properties of Graphene, Carbon Nanotubes, and Carbon Nanofibers 4.5. Electronic and Related Properties of Graphene, Graphene Nanoribbons, Carbon Nanotubes, and Carbon Nanohorns 4.6. Magnetic Properties of Carbon Nanoallotropes 4.7. Chemical Reactivity 4.7.1. Addition to sp 2 Carbon Atoms 4.7.2. Reactions at Edges and Defect Sites 4.7.3. Noncovalent Surface Interactions 4.7.4. Internal Spaces as Nanoreactors 5. Interconversions of Carbon Nanoallotropes 6.

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“…Raman spectrum of the “gray” particle (Fig. c) is, on the contrary, typical of a well‐developed NGP thus indicating completeness of C 60 collapse/transformation to graphene. Importantly, we observed several carbon particles which displayed an “intermediate” behavior, i.e., the scratch width change across their surface that is likely an indicative of a more complicated phase composition of these particles.…”

Section: Resultsmentioning

confidence: 99%

“…Extended studies of C 60 fullerite behavior at high pressure and high temperature (HPHT) led to synthesis of various phases – one‐ (1D), two‐ (2D), and three‐dimensional (3D) polymers, respectively, and sp 2 –sp 3 carbon‐based phases with different degree of disorder mapped on transformation p‐T diagrams . Under certain p,T conditions C 60 cages collapse and the resulting sp 2 –sp 3 carbon phase (NGP) exhibits combination of remarkable mechanical properties – high hardness , high‐elastic recovery , and low friction . First, Tatyanin et al and recently Lepoittevin et al have speculated about possibility of a pseudo‐martensitic mechanism of this structural transformation although no experimental evidence in favor of this assumption was provided to date.…”

Section: Introductionmentioning

confidence: 99%

Raman and electron microscopy study of C₆₀collapse/transformation to a nanoclustered graphene-based disordered carbon phase at high pressure/temperature

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Chernogorova

Drozdova

et al. 2015

Phys. Status Solidi B

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Transformation of C 60 polymers to a superelastic hard carbon (nanoclustered graphene phase (NGP)) occurring in metal matrix at 5 GPa in a temperature interval of 1000-1100 K was studied by optical, scanning electron microscopy (SEM), and Raman spectroscopy. Raman spectral scan across the sample surface allowed us to identify different stages of the structural transformation. The SEM and Raman spectroscopy data testify for the NGP appearance at the defects concentration sites in the parent fullerite structure. We propose that the buckyballs collapse/formation of the NGP is governed by nucleation and growth (diffusive) mechanism unlike earlier discussed in the literature possibility of the martensitic-type (displacive) character of this transformation.

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Structure and physical properties of nanoclustered graphene synthesized from C60 fullerene under high pressure and high temperature

Abstract: Articles you may be interested inIn situ structure characterization of Pb(Yb1/2Nb1/2)O3-PbTiO3 crystals under high pressure-temperature Appl.Structure and properties of superelastic hard carbon phase created in fullerene-metal composites by high temperature-high pressure treatment

Cited by 35 publications

References 11 publications

Electrical-contact properties of a composite material with a copper matrix reinforced by superelastic hard carbon

Electrical-contact properties of a composite material with a copper matrix reinforced by superelastic hard carbon

Broad Family of Carbon Nanoallotropes: Classification, Chemistry, and Applications of Fullerenes, Carbon Dots, Nanotubes, Graphene, Nanodiamonds, and Combined Superstructures

Raman and electron microscopy study of C₆₀collapse/transformation to a nanoclustered graphene-based disordered carbon phase at high pressure/temperature

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Structure and physical properties of nanoclustered graphene synthesized from C60 fullerene under high pressure and high temperature

Abstract: Articles you may be interested inIn situ structure characterization of Pb(Yb1/2Nb1/2)O3-PbTiO3 crystals under high pressure-temperature Appl.Structure and properties of superelastic hard carbon phase created in fullerene-metal composites by high temperature-high pressure treatment

Cited by 35 publications

References 11 publications

Electrical-contact properties of a composite material with a copper matrix reinforced by superelastic hard carbon

Electrical-contact properties of a composite material with a copper matrix reinforced by superelastic hard carbon

Broad Family of Carbon Nanoallotropes: Classification, Chemistry, and Applications of Fullerenes, Carbon Dots, Nanotubes, Graphene, Nanodiamonds, and Combined Superstructures

Raman and electron microscopy study of C60collapse/transformation to a nanoclustered graphene-based disordered carbon phase at high pressure/temperature

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Raman and electron microscopy study of C₆₀collapse/transformation to a nanoclustered graphene-based disordered carbon phase at high pressure/temperature