1.
Coluci, VR; Timoteo, VS; Galvao, DS
Thermophoretically driven carbon nanotube oscillators Journal Article
In: Applied Physics Letters, vol. 95, no. 25, pp. 253103, 2009.
@article{coluci2009thermophoretically,
title = {Thermophoretically driven carbon nanotube oscillators},
author = {Coluci, VR and Timoteo, VS and Galvao, DS},
url = {http://scitation.aip.org/content/aip/journal/apl/95/25/10.1063/1.3276546},
year = {2009},
date = {2009-01-01},
journal = {Applied Physics Letters},
volume = {95},
number = {25},
pages = {253103},
publisher = {AIP Publishing},
abstract = {The behavior of a nanodevice based upon double-walled carbon nanotubeoscillators driven by periodically applied thermal gradients (7 and 17 K/nm) is investigated by numerical calculations and classical molecular dynamics simulations. Our results indicate that thermophoresis can be effective to initiate the oscillator and that suitable heat pulses may provide an appropriate way to tune its behavior. Sustained regular oscillatory as well as chaotic motions were observed for the systems investigated in this work.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The behavior of a nanodevice based upon double-walled carbon nanotubeoscillators driven by periodically applied thermal gradients (7 and 17 K/nm) is investigated by numerical calculations and classical molecular dynamics simulations. Our results indicate that thermophoresis can be effective to initiate the oscillator and that suitable heat pulses may provide an appropriate way to tune its behavior. Sustained regular oscillatory as well as chaotic motions were observed for the systems investigated in this work.
2.
Coluci, VR; Legoas, SB; de Aguiar, MAM; Galvao, DS
Chaotic signature in the motion of coupled carbon nanotube oscillators Journal Article
In: Nanotechnology, vol. 16, no. 4, pp. 583, 2005.
@article{coluci2005chaotic,
title = {Chaotic signature in the motion of coupled carbon nanotube oscillators},
author = {Coluci, VR and Legoas, SB and de Aguiar, MAM and Galvao, DS},
url = {http://iopscience.iop.org/0957-4484/16/4/041},
year = {2005},
date = {2005-01-01},
journal = {Nanotechnology},
volume = {16},
number = {4},
pages = {583},
publisher = {IOP Publishing},
abstract = {The motion of coupled oscillators based on multiwalled carbon nanotubes is studied using rigid-body dynamics simulations. The results show the existence of chaotic and regular behaviours for a given total energy, indicating the manifestation of chaos in nanoscaled mechanical systems based on carbon nanotube oscillators. Different regular motions are observed for different total energies, and they can be obtained by appropriately choosing the initial conditions. This possibility can allow the construction of multi-functional nano-devices based on multiwalled carbon nanotube oscillators.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The motion of coupled oscillators based on multiwalled carbon nanotubes is studied using rigid-body dynamics simulations. The results show the existence of chaotic and regular behaviours for a given total energy, indicating the manifestation of chaos in nanoscaled mechanical systems based on carbon nanotube oscillators. Different regular motions are observed for different total energies, and they can be obtained by appropriately choosing the initial conditions. This possibility can allow the construction of multi-functional nano-devices based on multiwalled carbon nanotube oscillators.
3.
Legoas, SB; Coluci, VR; Braga, SF; Coura, PZ; Dantas, SO; Galvao, DS
Gigahertz nanomechanical oscillators based on carbon nanotubes Journal Article
In: Nanotechnology, vol. 15, no. 4, pp. S184, 2004.
@article{legoas2004gigahertz,
title = {Gigahertz nanomechanical oscillators based on carbon nanotubes},
author = {Legoas, SB and Coluci, VR and Braga, SF and Coura, PZ and Dantas, SO and Galvao, DS},
url = {http://iopscience.iop.org/0957-4484/15/4/012},
year = {2004},
date = {2004-01-01},
journal = {Nanotechnology},
volume = {15},
number = {4},
pages = {S184},
publisher = {IOP Publishing},
abstract = {We report molecular dynamics studies of carbon nanotubes as mechanical gigahertz oscillators. Our results show that different oscillatory regimes exist but that sustained oscillations are possible only when the radii difference values of the inner and outer tubes are {sim }3.4~AA . Frequencies as large as 87 GHz were obtained. Calculated force and frequency values are in good agreement with estimated data from recent experimental investigations.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We report molecular dynamics studies of carbon nanotubes as mechanical gigahertz oscillators. Our results show that different oscillatory regimes exist but that sustained oscillations are possible only when the radii difference values of the inner and outer tubes are {\sim }3.4~\AA . Frequencies as large as 87 GHz were obtained. Calculated force and frequency values are in good agreement with estimated data from recent experimental investigations.
4.
VR Coluci SB Legoas, SF Braga
Molecular-dynamics simulations of carbon nanotubes as gigahertz oscillators Journal Article
In: Physical Review Letters, vol. 90, no. 5, pp. 055504, 2003.
@article{legoas2003molecularb,
title = {Molecular-dynamics simulations of carbon nanotubes as gigahertz oscillators},
author = {SB Legoas, VR Coluci, SF Braga, PZ Coura, SO Dantas, DS Galvao},
year = {2003},
date = {2003-01-01},
journal = {Physical Review Letters},
volume = {90},
number = {5},
pages = {055504},
abstract = {Recently, Zheng and Jiang [Phys. Rev. Lett. 88, 045503 (2002)] have proposed that multiwalled carbon nanotubes could be the basis for a new generation of nano-oscillators in the several gigahertz range. In this Letter, we present the first molecular dynamics simulation for these systems. Different nanotube types were considered in order to verify the reliability of such devices as gigahertz oscillators. Our results show that these nano-oscillators are dynamically stable when the radii difference values between inner and outer tubes are of ∼3.4 Å. Frequencies as large as 38 GHz were observed, and the calculated force values are in good agreement with recent experimental investigations.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Recently, Zheng and Jiang [Phys. Rev. Lett. 88, 045503 (2002)] have proposed that multiwalled carbon nanotubes could be the basis for a new generation of nano-oscillators in the several gigahertz range. In this Letter, we present the first molecular dynamics simulation for these systems. Different nanotube types were considered in order to verify the reliability of such devices as gigahertz oscillators. Our results show that these nano-oscillators are dynamically stable when the radii difference values between inner and outer tubes are of ∼3.4 Å. Frequencies as large as 38 GHz were observed, and the calculated force values are in good agreement with recent experimental investigations.
2009
4.
Coluci, VR; Timoteo, VS; Galvao, DS
Thermophoretically driven carbon nanotube oscillators Journal Article
In: Applied Physics Letters, vol. 95, no. 25, pp. 253103, 2009.
Abstract | Links | BibTeX | Tags: Carbon Nanotubes, Chaos, Oscillators, Thermophoretical
@article{coluci2009thermophoretically,
title = {Thermophoretically driven carbon nanotube oscillators},
author = {Coluci, VR and Timoteo, VS and Galvao, DS},
url = {http://scitation.aip.org/content/aip/journal/apl/95/25/10.1063/1.3276546},
year = {2009},
date = {2009-01-01},
journal = {Applied Physics Letters},
volume = {95},
number = {25},
pages = {253103},
publisher = {AIP Publishing},
abstract = {The behavior of a nanodevice based upon double-walled carbon nanotubeoscillators driven by periodically applied thermal gradients (7 and 17 K/nm) is investigated by numerical calculations and classical molecular dynamics simulations. Our results indicate that thermophoresis can be effective to initiate the oscillator and that suitable heat pulses may provide an appropriate way to tune its behavior. Sustained regular oscillatory as well as chaotic motions were observed for the systems investigated in this work.},
keywords = {Carbon Nanotubes, Chaos, Oscillators, Thermophoretical},
pubstate = {published},
tppubtype = {article}
}
The behavior of a nanodevice based upon double-walled carbon nanotubeoscillators driven by periodically applied thermal gradients (7 and 17 K/nm) is investigated by numerical calculations and classical molecular dynamics simulations. Our results indicate that thermophoresis can be effective to initiate the oscillator and that suitable heat pulses may provide an appropriate way to tune its behavior. Sustained regular oscillatory as well as chaotic motions were observed for the systems investigated in this work.
2005
3.
Coluci, VR; Legoas, SB; de Aguiar, MAM; Galvao, DS
Chaotic signature in the motion of coupled carbon nanotube oscillators Journal Article
In: Nanotechnology, vol. 16, no. 4, pp. 583, 2005.
Abstract | Links | BibTeX | Tags: Carbon Nanotubes, Chaos, Oscillators
@article{coluci2005chaotic,
title = {Chaotic signature in the motion of coupled carbon nanotube oscillators},
author = {Coluci, VR and Legoas, SB and de Aguiar, MAM and Galvao, DS},
url = {http://iopscience.iop.org/0957-4484/16/4/041},
year = {2005},
date = {2005-01-01},
journal = {Nanotechnology},
volume = {16},
number = {4},
pages = {583},
publisher = {IOP Publishing},
abstract = {The motion of coupled oscillators based on multiwalled carbon nanotubes is studied using rigid-body dynamics simulations. The results show the existence of chaotic and regular behaviours for a given total energy, indicating the manifestation of chaos in nanoscaled mechanical systems based on carbon nanotube oscillators. Different regular motions are observed for different total energies, and they can be obtained by appropriately choosing the initial conditions. This possibility can allow the construction of multi-functional nano-devices based on multiwalled carbon nanotube oscillators.},
keywords = {Carbon Nanotubes, Chaos, Oscillators},
pubstate = {published},
tppubtype = {article}
}
The motion of coupled oscillators based on multiwalled carbon nanotubes is studied using rigid-body dynamics simulations. The results show the existence of chaotic and regular behaviours for a given total energy, indicating the manifestation of chaos in nanoscaled mechanical systems based on carbon nanotube oscillators. Different regular motions are observed for different total energies, and they can be obtained by appropriately choosing the initial conditions. This possibility can allow the construction of multi-functional nano-devices based on multiwalled carbon nanotube oscillators.
2004
2.
Legoas, SB; Coluci, VR; Braga, SF; Coura, PZ; Dantas, SO; Galvao, DS
Gigahertz nanomechanical oscillators based on carbon nanotubes Journal Article
In: Nanotechnology, vol. 15, no. 4, pp. S184, 2004.
Abstract | Links | BibTeX | Tags: Carbon Nanotubes, Molecular Dynamics, Oscillators
@article{legoas2004gigahertz,
title = {Gigahertz nanomechanical oscillators based on carbon nanotubes},
author = {Legoas, SB and Coluci, VR and Braga, SF and Coura, PZ and Dantas, SO and Galvao, DS},
url = {http://iopscience.iop.org/0957-4484/15/4/012},
year = {2004},
date = {2004-01-01},
journal = {Nanotechnology},
volume = {15},
number = {4},
pages = {S184},
publisher = {IOP Publishing},
abstract = {We report molecular dynamics studies of carbon nanotubes as mechanical gigahertz oscillators. Our results show that different oscillatory regimes exist but that sustained oscillations are possible only when the radii difference values of the inner and outer tubes are {sim }3.4~AA . Frequencies as large as 87 GHz were obtained. Calculated force and frequency values are in good agreement with estimated data from recent experimental investigations.},
keywords = {Carbon Nanotubes, Molecular Dynamics, Oscillators},
pubstate = {published},
tppubtype = {article}
}
We report molecular dynamics studies of carbon nanotubes as mechanical gigahertz oscillators. Our results show that different oscillatory regimes exist but that sustained oscillations are possible only when the radii difference values of the inner and outer tubes are {\sim }3.4~\AA . Frequencies as large as 87 GHz were obtained. Calculated force and frequency values are in good agreement with estimated data from recent experimental investigations.
2003
1.
VR Coluci SB Legoas, SF Braga
Molecular-dynamics simulations of carbon nanotubes as gigahertz oscillators Journal Article
In: Physical Review Letters, vol. 90, no. 5, pp. 055504, 2003.
Abstract | BibTeX | Tags: Carbon Nanotubes, Molecular Dynamics, Oscillators, top20
@article{legoas2003molecularb,
title = {Molecular-dynamics simulations of carbon nanotubes as gigahertz oscillators},
author = {SB Legoas, VR Coluci, SF Braga, PZ Coura, SO Dantas, DS Galvao},
year = {2003},
date = {2003-01-01},
journal = {Physical Review Letters},
volume = {90},
number = {5},
pages = {055504},
abstract = {Recently, Zheng and Jiang [Phys. Rev. Lett. 88, 045503 (2002)] have proposed that multiwalled carbon nanotubes could be the basis for a new generation of nano-oscillators in the several gigahertz range. In this Letter, we present the first molecular dynamics simulation for these systems. Different nanotube types were considered in order to verify the reliability of such devices as gigahertz oscillators. Our results show that these nano-oscillators are dynamically stable when the radii difference values between inner and outer tubes are of ∼3.4 Å. Frequencies as large as 38 GHz were observed, and the calculated force values are in good agreement with recent experimental investigations.},
keywords = {Carbon Nanotubes, Molecular Dynamics, Oscillators, top20},
pubstate = {published},
tppubtype = {article}
}
Recently, Zheng and Jiang [Phys. Rev. Lett. 88, 045503 (2002)] have proposed that multiwalled carbon nanotubes could be the basis for a new generation of nano-oscillators in the several gigahertz range. In this Letter, we present the first molecular dynamics simulation for these systems. Different nanotube types were considered in order to verify the reliability of such devices as gigahertz oscillators. Our results show that these nano-oscillators are dynamically stable when the radii difference values between inner and outer tubes are of ∼3.4 Å. Frequencies as large as 38 GHz were observed, and the calculated force values are in good agreement with recent experimental investigations.
http://scholar.google.com/citations?hl=en&user=95SvbM8AAAAJ
