Influence of longitudinal isotope substitution on the thermal conductivity of carbon nanotubes: Results of nonequilibrium molecular dynamics and local density functional calculations

2014 ◽  
Vol 140 (14) ◽  
pp. 144704 ◽  
Author(s):  
Frédéric Leroy ◽  
Joachim Schulte ◽  
Ganesh Balasubramanian ◽  
Michael C. Böhm
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Local Density ◽  
Nonequilibrium Molecular Dynamics ◽  
Isotope Substitution ◽  
Local Density Functional

Thermal properties of pillared-graphene nanostructures

2015 ◽  
Vol 1727 ◽  
Author(s):  
M. Rifu ◽  
K. Shintani
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Thermal Properties ◽  
Molecular Dynamics Simulation ◽  
Dynamics Simulation ◽  
Nonequilibrium Molecular Dynamics ◽  
Nonequilibrium Molecular Dynamics Simulation ◽  
Thermal Conductivities ◽  
Graphene Nanostructures

ABSTRACTThe thermal conductivities of pillared-graphene nanostructures (PGNSs) are obtained using nonequilibrium molecular-dynamics simulation. It is revealed their thermal conductivities are much smaller than the thermal conductivities of carbon nanotubes (CNTs). This fact is explained by examining the density of states (DOS) of the local phonons of PGNSs. It is also found the thermal conductivity of a PGNS linearly decreases with the increase of the inter-pillar distance.

Theory for New Carbon-Based Materials

1992 ◽  
Vol 270 ◽  
Author(s):  
D.W. Brenner ◽  
R.C. Mowrey ◽  
J. W. Mintmire ◽  
J.A. Harrison ◽  
D.H. Robertson ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Electronic Structures ◽  
Strain Energy ◽  
Density Functional ◽  
Local Density ◽  
Photoelectron Spectra ◽  
Cluster Calculations ◽  
Local Density Functional ◽  
Dynamics Simulations ◽  
Cohesive Energies

ABSTRACTWe review results of our local-density-functional-based cluster calculations and molecular dynamics simulations of fullerenes and related structures. These include predictions of cohesive energies, electronic structures, and photoelectron spectra for a number of pure and chemically substituted fullerenes, studies of the resilience of C60 under severe compression and during surface collisions, simulations of the trapping of Hein the interior of C60, predictions of the strain energy, electronic and elastic properties of graphitic tubules, and simulations of the folding and curling of graphitic ribbons.

scholarly journals The Thermal Conductivity of Carbon Nanotubes with Defects and Intramolecular Junctions

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Qiaoli Zhou ◽  
Fanyan Meng ◽  
Zhuhong Liu ◽  
Sanqiang Shi
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Temperature Gradient ◽  
Temperature Profile ◽  
Free Path ◽  
Mean Free Path ◽  
Nonequilibrium Molecular Dynamics ◽  
Large Temperature ◽  
Large Temperature Gradient

The thermal conductivity of various carbon nanotubes with defects or intramolecular junctions was studied using nonequilibrium molecular dynamics approach. The results show that the thermal conductivity of both armchair and zigzag carbon nanotubes increased with the decrease of the radius of the tube. The thermal conductivity of armchair tube is higher than that of zigzag tube when the radii of the two tubes are kept almost same. Discontinuities appear on the temperature profile along the tube axial at the region of IMJ, resulting in the large temperature gradient and thus lower thermal conductivity of(n,n)/(m,0)tube with one IMJ and(m,0)/(n,n)/(m,0)tube with two IMJs. For the(m,0)/(n,n)/(m,0)tube with two IMJs, phonon mean free path of the middle(n,n)tube is much smaller than that of the isolate(n,n)tube.

Local-density-functional calculations of the vacancy-oxygen center in Ge

2007 ◽  
Vol 75 (11) ◽  
Author(s):  
A. Carvalho ◽  
R. Jones ◽  
J. Coutinho ◽  
V. J. B. Torres ◽  
S. Öberg ◽  
...  
Keyword(s):  
Density Functional Calculations ◽  
Density Functional ◽  
Local Density ◽  
Oxygen Center ◽  
Local Density Functional
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