Thermal rectifiers from deformed carbon nanohorns

We study thermal rectification in single-walled carbon nanohorns (SWNHs) by using a non-equilibrium molecular dynamics (MD) method. It is found that the horns with the bigger top angles show larger asymmetric heat transport due to the larger structural gradient distribution. This kind of gradient behavior can be further adjusted by applying external strain on the SWNHs. After being carefully elongated along the axial direction, thermal rectification in the elongated SWNHs can become more obvious than that in undeformed SWNHs. The maximum rectification efficiency of SWNHs is much bigger than that of carbon nanotube intramolecular junctions.

[1]  Baowen Li,et al.  Thermal logic gates: computation with phonons. , 2007, Physical review letters.

[2]  Baowen Li,et al.  Negative differential thermal resistance and thermal transistor , 2006 .

[3]  Sumio Iijima,et al.  Carbon nanotubes: past, present, and future , 2002 .

[4]  Baowen Li,et al.  Thermal rectification and negative differential thermal resistance in lattices with mass gradient , 2007, 0707.0977.

[5]  Athanassios S. Fokas,et al.  Mathematical Physics 2000 , 2000 .

[6]  Tsutomu Yoshitake,et al.  Preparation of fine platinum catalyst supported on single-wall carbon nanohorns for fuel cell application , 2002 .

[7]  Interface thermal resistance between dissimilar anharmonic lattices. , 2005, Physical review letters.

[8]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[9]  Hoover,et al.  Canonical dynamics: Equilibrium phase-space distributions. , 1985, Physical review. A, General physics.

[10]  E. Bekyarova,et al.  Single-Wall Nanostructured Carbon for Methane Storage , 2003 .

[11]  M. Yudasaka,et al.  Drug-loaded carbon nanohorns: adsorption and release of dexamethasone in vitro. , 2004, Molecular pharmaceutics.

[12]  Andrew G. Glen,et al.  APPL , 2001 .

[13]  Thermal conduction in classical low-dimensional lattices , 2001, cond-mat/0112193.

[14]  Donald W. Brenner,et al.  A second-generation reactive empirical bond order (REBO) potential energy expression for hydrocarbons , 2002 .

[15]  M. Yudasaka,et al.  Nano-aggregates of single-walled graphitic carbon nano-horns , 1999 .

[16]  Madhu Menon,et al.  Structural and vibrational properties of fullerenes and nanotubes in a nonorthogonal tight‐binding scheme , 1996 .

[17]  Baowen Li,et al.  Thermal rectification in carbon nanotube intramolecular junctions: Molecular dynamics calculations , 2007, 0707.4241.

[18]  Hideki Tanaka,et al.  Quantum effects on hydrogen isotope adsorption on single-wall carbon nanohorns. , 2005, Journal of the American Chemical Society.

[19]  Baowen Li,et al.  Thermal diode: rectification of heat flux. , 2004, Physical review letters.

[20]  Anomalous heat conduction and anomalous diffusion in nonlinear lattices, single walled nanotubes, and billiard gas channels. , 2004, Chaos.