Low-Temperature Heat Transfer in Nanowires

Glavin, B. A.

doi:10.1103/physrevlett.86.4318

Cited by 85 publications

(51 citation statements)

References 16 publications

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“…As one of the most important onedimensional (1D) nanometer materials, metal nanowires have attracted a great deal of interests in recent years, because of their great importance in fundamental low-dimensional physics as well as in technology [2][3][4][5][6][7][8] experimentally and theoretically [9][10][11][12][13][14][15][16][17][18][19]. As we know, for crystals the structure is an important determinant to their melting process which starts from the surface layer and propagates into the interior; the melting temperature of surface is significantly lower than that of the bulk [9,10].…”

Section: Introductionmentioning

confidence: 99%

Size effects on the melting of nickel nanowires: a molecular dynamics study

Zhu

et al. 2004

Physica E: Low-dimensional Systems and Nanostructures

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The melting process of nickel nanowires are simulated by using molecular dynamics with the quantum Sutten-Chen many-body force field. The wires studied were approximately cylindrical in cross-section and periodic boundary conditions were applied along their length; the atoms were arranged initially in a face-centred cubic structure with the [0 0 1] direction parallel to the long axis of the wire. The size effects of the nanowires on the melting temperatures are investigated. We find that for the nanoscale regime, the melting temperatures of Ni nanowires are much lower than that of the bulk and are linear with the reciprocal of the diameter of the nanowire. When a nanowire is heated up above the melting temperature, the neck of the nanowire begins to arise and the diameter of neck decreases rapidly with the equilibrated running time. Finally, the breaking of nanowire arises, which leads to the formation of the spherical clusters. r

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Section: Introductionmentioning

confidence: 99%

Size effects on the melting of nickel nanowires: a molecular dynamics study

Zhu

et al. 2004

Physica E: Low-dimensional Systems and Nanostructures

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“…As one of the most important one-dimensional (1D) nanometer materials, the metal nanowires have been expected to play an important role in future electronic, optical and nanoelectromechanical devices [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations

Zhu

Shao

et al. 2005

Physica E: Low-dimensional Systems and Nanostructures

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The mechanical deformations of nickel nanowire subjected to uniaxial tensile strain at 300 K are simulated by using molecular dynamics with the quantum corrected Sutten-Chen many-body force field. We have used common neighbor analysis method to investigate the structural evolution of Ni nanowire during the elongation process. For the strain rate of 0.1%/ps, the elastic limit is up to about 11% strain with the yield stress of 8.6 GPa. At the elastic stage, the deformation is carried mainly through the uniform elongation of the distances between the layers (perpendicular to the Z-axis) while the atomic structure remains basically unchanged. With further strain, the slips in the {1 1 1} planes start to take place in order to accommodate the applied strain to carry the deformation partially, and subsequently the neck forms. The atomic rearrangements in the neck region result in a zigzag change in the stress-strain curve; the atomic structures beyond the region, however, have no significant changes. With the strain close to the point of the breaking, we observe the formation of a one-atom thick necklace in Ni nanowire. The strain rates have no significant effect on the deformation mechanism, but have some influence on the yield stress, the elastic limit, and the fracture strain of the nanowire. r

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“…Despite the fact that thermal transport in disordered quasi-one-dimensional (1D) systems has been addressed in several theoretical studies [3][4][5][6][7][8][9][10][11][12][13][14], a detailed analysis of this problem in realistic systems at the atomic scale is still lacking. Previous work has focused on short nanowires (NWs) and thin films with rough surface [3][4][5][6][7][8] and isotope impurities [9]. Also, carbon NTs (CNTs) in the presence of structural or chemical defects [10][11][12] and isotope impurities [13,14] have been investigated.…”

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confidence: 99%

Phonon Transport in Isotope-Disordered Carbon and Boron-Nitride Nanotubes: Is Localization Observable?

2008

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We present an ab initio study which identifies dominant effects leading to thermal conductivity reductions in carbon and boron-nitride nanotubes with isotope disorder. Our analysis reveals that, contrary to previous speculations, localization effects cannot be observed in the thermal conductivity measurements. Observable reduction of the thermal conductivity is mostly due to diffusive scattering. Multiple scattering induced interference effects were found to be prominent for isotope concentrations *10%; otherwise, the thermal conduction is mainly determined by independent scattering contributions of single isotopes. We give explicit predictions of the effect of isotope disorder on nanotube thermal conductivity that can be directly compared with experiments.

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Low-Temperature Heat Transfer in Nanowires

Cited by 85 publications

References 16 publications

Size effects on the melting of nickel nanowires: a molecular dynamics study

Size effects on the melting of nickel nanowires: a molecular dynamics study

The uniaxial tensile deformation of Ni nanowire: atomic-scale computer simulations

Phonon Transport in Isotope-Disordered Carbon and Boron-Nitride Nanotubes: Is Localization Observable?

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