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Osman, M.A.; Srivastava, Deepak

doi:10.1088/0957-4484/12/1/305

Cited by 391 publications

(193 citation statements)

References 19 publications

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“…In this figure, the local temperatures of each segment which were obtained by averaging over 500 data are indicated by symbols. Corresponding error bars indicate the statistical errors and are in the range 4-6 K. Notice that the temperature profiles are nonlinear which is a commonly observed behavior in nonequilibrium molecular dynamics simulation of thermal conductivity [14,15,16]. It is a consequence of the strong phonon scattering caused by the heat source or heat sink and can be explained by partly diffusive and partly ballistic energy transport along the system [14,25].…”

Section: Producing Temperature Gradientmentioning

confidence: 95%

Directed motion ofC60on a graphene sheet subjected to a temperature gradient

2011

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Nonequilibrium molecular dynamics simulations is used to study the motion of a C60 molecule on a graphene sheet subjected to a temperature gradient. The C60 molecule is actuated and moves along the system while it just randomly dances along the perpendicular direction. Increasing the temperature gradient increases the directed velocity of C60. It is found that the free energy decreases as the C60 molecule moves toward the cold end. The driving mechanism based on the temperature gradient suggests the construction of nanoscale graphene-based motors.

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Section: Producing Temperature Gradientmentioning

confidence: 95%

Directed motion ofC60on a graphene sheet subjected to a temperature gradient

2011

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“…They are extremely stiff, displaying Young's modulus close to 1 TPa, and are among the world's strongest materials, with strength between 50 and 100 GPa. [4] Nanotubes are predicted to have very large thermal conductivity of up to 6000 W/mK [8][9][10] . While this has not yet been attained, values around 3000 W/mK have been measured for multiwalled nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Coleman

2009

Adv Funct Materials

587

530

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Many applications of carbon nanotubes require the exfoliation of the nanotubes to give individual tubes in the liquid phase. This requires the dispersion, exfoliation and stabilisation of nanotubes in a variety of liquids. In this paper we review recent work in this area, focusing on results from the author's group. We begin by reviewing stabilisation mechanisms before exploring research into the exfoliation of nanotubes in solvents, by using surfactants or biomolecules and by covalent attachment of molecules.The concentration dependence of the degree of exfoliation in each case will be highlighted. In addition we will discuss research into the dispersion mechanism for each dispersant type. Most importantly we have compared dispersion quality metrics for all dispersants. From this analysis, we conclude that functionalised nanotubes can be exfoliated to the greatest degree. Finally, we review the extension of this work to the liquid phase exfoliation of graphite to give graphene.

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“…Maruyama pointed out that the structure will strongly affect the power. The β exponents for (5,5), (8,8) and (10,10) A c c e p t e d m a n u s c r i p t 16 For specific heat, we first calculate the value of bulk c-Si at 300 K to explore the validity of the developed MD program. The sample of interest measures 6.52 nm in the x, y, and z directions, and consists of 13,824 atoms.…”

Section: Thermal Conductivity and Specific Heat Of Swsntsmentioning

confidence: 99%

“…Experimentally, Hone et al [5] measured the thermophysical properties of single wall CNTs and gave the temperature dependence of the thermal conductivity from 8 to 350 K. Yang et al [6] and Wang et al [7] studied the thermal conductivity of multiwall CNTs using photothermal experiments and found the thermal conductivity of multiwall CNTs is much less than the theoretical prediction. For numerical studies, molecular dynamics (MD) simulation has been widely employed to study the thermal transport in CNTs [2,8]. Previous study by Chen and Volz [9] explored the thermal conductivity of another 1D structure allotrope of Si nanowires using equilibrium MD (EMD) simulation.…”

Section: Introductionmentioning

confidence: 99%

Structure and thermophysical properties of single-wall Si nanotubes

Wang

Huang

Wang

et al. 2008

Physica B: Condensed Matter

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Structure and thermophysical properties of single-wall Si nanotubes, Physica B (2007), doi:10.1016/j.physb.2007.11.016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A c c e p t e d m a n u s c r i p t ABSTRACTIn this work, molecular dynamics (MD) simulation based on the environment-dependent interatomic potential is carried out to explore the structure, atomic energy distribution, and thermophysical properties of single-wall Si nanotubes (SWSNTs). The unique structure of SWSNTs leads to a wider range energy distribution than crystal Si (c-Si), and results in a bond order in the range of 4.8~5. The thermal conductivity of SWSNTs is much smaller than that of bulk Si, and shows significantly slower change with their characteristic size than that of Si films.Out of the three types of SWSNTs studied in this work, pentagonal SWSNTs have the highest thermal conductivity while hexagonal SWSNTs have the lowest one. The specific heat of SWSNTs is a little larger than that of bulk c-Si. Pentagonal and hexagonal SWSNTs have close specific heats which are a little larger than that of rectangular SWSNTs.

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Untitled

Cited by 391 publications

References 19 publications

Directed motion ofC60on a graphene sheet subjected to a temperature gradient

Directed motion ofC60on a graphene sheet subjected to a temperature gradient

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Structure and thermophysical properties of single-wall Si nanotubes

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