Elastic modules of solid C 60 : measurement and relationship with nanostructure

Levin, V. M.; Бланк, В. Д.; Prokhorov, V. M.; Soifer, Ja.M.; Кобелев, Н. П.

doi:10.1016/s0022-3697(99)00357-1

Cited by 32 publications

(12 citation statements)

References 7 publications

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“…Elastic modules of ID and 2D polymerized C 60 have been measured by the pulse time-resolved method of acoustic microscopy [6]. The experimental values of the bulk elastic modulus B for ID and 2D polymerized C 6 4 fullerites (BID = 27 GPa and B 2 D = 45 GPa) are close to our estimations -17 and 35 GPa respectively.…”

supporting

confidence: 70%

“…The ultimate value ofB = 950 GPa arises when the average interlayer distance b coincides with the one in graphite. Calculated values are able to explain extremely high values of the bulk elastic modulus of ultrahard fullerites B = 550 -800 GPa having been observed in experiments [6].…”

supporting

confidence: 54%

“…Mechanical properties of HPHT phases follow structural transformations. Polymerized fullerenes demonstrate a wide spectrum of phases with diverse nanostructure, elastic properties of that are available [6] to compare with our modeling estimations. At first stages of polymerization fullerene balls are linked together into linear chains or planar structures [7] by pairs of sp 3 bonds (2+2 cycloaddition mechanism).…”

mentioning

confidence: 99%

“…This type of C6o polymerization is realized at quite high pressure (9 + 12 GPa) and temperature (higher 1000 0 C). Elastic properties of 3D polymerized fullerites have been measured by acoustic microscopy technique [6] and Brillouin scattering method; it was been shown the hardness and bulk modulus of some 3D polymerized phases are compared with these parameters of diamond. It necessary to underline 3D polymerized phases in practice are observed in crystalline (actual ly,polycrystalline) or partly disordered states.…”

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confidence: 99%

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Modeling mechanical properties of carbon molecular clusters and carbon nanostructural materials

2002

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The concept of 2D elasticity of a graphene sheet together with the idea of stiffness of a single sp 3 bond have been applied to theoretical evaluating elastic properties of diverse carbon states. 2D elastic moduli have been extracted from data on elastic moduli of crystalline graphite. Stiffness of the sp 3 bond has been estimated from data on the elastic modulus of diamond. Efficiency of Van-der-Waals interaction has been taken from the elastic modulus C 33 of crystalline graphite. Characteristics of single fullerene deformability have been computed by the molecular dynamics method. Theoretical estimations have been performed for single molecular clusters, pristine fullerite, HPHT phases of polymerized Cuo, etc. The estimations are in good agreement with experimental data on elastic properties and nanoscale structure of carbon states. The approach is effective for establishing interrelation between nanostructure and elastic properties, for prediction and classification of nanostructure in novel carbon materials.

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supporting

confidence: 70%

supporting

confidence: 54%

mentioning

confidence: 99%

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confidence: 99%

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Modeling mechanical properties of carbon molecular clusters and carbon nanostructural materials

2002

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“…For 15 N@C 60 , we take 24 A free = −14.65 MHz and A = −22.35 MHz and hence ∆A = 7.70 MHz. The bulk modulus of crystalline C 60 samples has been measured experimentally, [25][26][27][28] but the value for an isolated C 60 molecule under conditions of hydrostatic pressure is only known via simulations. [10][11][12][13][14] The simulated values range from 300 to 1200 GPa, with a grouping in the range 700 to 900 GPa.…”

Section: B Theorymentioning

confidence: 99%

High pressure electron spin resonance of the endohedral fullerene $^{15}\mathrm{N@C}_{60}$

Harding¹,

Folli²,

Zhou³

et al. 2017

Preprint

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We measure the electron spin resonance spectrum of the endohedral fullerene molecule 15 N@C 60 at pressures ranging from atmospheric pressure to 0.25 GPa, and find that the hyperfine coupling increases linearly with pressure. We present a model based on van der Waals interactions, which accounts for this increase via compression of the fullerene cage and consequent admixture of orbitals with a larger hyperfine coupling. Combining this model with theoretical estimates of the bulk modulus, we predict the pressure shift and compare it to our experimental results, finding fair agreement given the spread in estimates of the bulk modulus. The spin resonance linewidth is also found to depend on pressure. This is explained by considering the pressure-dependent viscosity of the solvent, which modifies the effect of dipolar coupling between spins within fullerene clusters.

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