PREDICTION OF ELECTRON DRIFT VELOCITY IN HELICALLY COILED CARBON NANOTUBES

We studied electron transport in single wall carbon nanotubes placed in stationary homogeneous electric fields, oriented along tubes. Electron distributions for various electric fields are determined by solving stationary multi bands Boltzmann transport equation in presence of electron phonon scattering mechanisms. Contributions of all possible scattering channels, allowed by selection rules and energy conservation, are taken into account for finding scattering rate and collision integrals. As it is previously predicted, large electron drift velocities in straight single wall carbon nanotubes are obtained. Frequent electron scattering as well as low group velocity have strong impact on reduction of drift velocity in helically coiled carbon nanotubes.

Download Full-text

Anisotropic polarizability of isolated semiconducting single-wall carbon nanotubes in alternating electric fields

Applied Physics Letters ◽

10.1063/1.2807850 ◽

2007 ◽

Vol 91 (21) ◽

pp. 213105 ◽

Cited By ~ 13

Author(s):

J. A. Fagan ◽

V. Bajpai ◽

B. J. Bauer ◽

E. K. Hobbie

Keyword(s):

Carbon Nanotubes ◽

Electric Fields ◽

Single Wall Carbon Nanotubes ◽

Anisotropic Polarizability ◽

Single Wall Carbon ◽

Alternating Electric Fields

Download Full-text

The effect of acoustic phonon scattering on the carrier mobility in the semiconducting zigzag single wall carbon nanotubes

Applied Physics Letters ◽

10.1063/1.3427419 ◽

2010 ◽

Vol 96 (18) ◽

pp. 183108 ◽

Cited By ~ 37

Author(s):

B. Xu ◽

Y. D. Xia ◽

J. Yin ◽

X. G. Wan ◽

K. Jiang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Acoustic Phonon ◽

Carrier Mobility ◽

Phonon Scattering ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon

Download Full-text

Directed Assembly of Nanoelements Using Electrostatically Addressable Templates

MRS Proceedings ◽

10.1557/proc-0901-ra04-01 ◽

2005 ◽

Vol 901 ◽

Cited By ~ 7

Author(s):

Xugang Xiong ◽

Prashanth Makaram ◽

Kaveh Bakhtari ◽

Sivasubramanian Somu ◽

Ahmed Busnaina ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

Electric Fields ◽

Directed Assembly ◽

Single Wall Carbon Nanotubes ◽

Nanoparticle Assembly ◽

Single Wall Carbon ◽

Ac Electric Fields ◽

Ac Electric Field ◽

Dc Electric Field

AbstractDirected assembly of nanoparticles and single wall carbon nanotubes (SWNTs) using electrostatically addressable templates has been demonstrated. Nanoparticles down to 50 nm are assembled on the Au micro and nanowires of the templates in a DC and AC electric fields. The nanoparticles can be assembled in monolayers and thicker layers. Single wall carbon nanotubes (SWNTs) are also assembled without alignment on Au wires using the nanotemplate. As the size of the template wires is reduced to nanoscale dimensions, an AC electric field proves to be more effective for nanoparticle assembly than a DC electric field.

Download Full-text

Electronic Structure Modulations of Radially Deformed Single Wall Carbon Nanotubes under Transverse External Electric Fields

The Journal of Physical Chemistry C ◽

10.1021/jp807206m ◽

2009 ◽

Vol 113 (12) ◽

pp. 4792-4796 ◽

Cited By ~ 25

Author(s):

Yaroslav V. Shtogun ◽

Lilia M. Woods

Keyword(s):

Carbon Nanotubes ◽

Electronic Structure ◽

Electric Fields ◽

Single Wall Carbon Nanotubes ◽

Single Wall Carbon ◽

External Electric Fields

Download Full-text

Thermal Conductance of Individual Single-Wall Carbon Nanotubes

ASME 2008 3rd Energy Nanotechnology International Conference ◽

10.1115/enic2008-53028 ◽

2008 ◽

Author(s):

Michael T. Pettes ◽

Li Shi

Keyword(s):

Carbon Nanotubes ◽

Thermal Resistance ◽

Phonon Scattering ◽

Thermal Conductance ◽

Phonon Transport ◽

Single Wall Carbon Nanotubes ◽

Platinum Resistance ◽

Contact Thermal Resistance ◽

Single Wall Carbon ◽

Temperature Range

This work presents an experimental study of phonon transport in individual suspended single-wall carbon nanotubes (SWCNTs). Through the use of a micro fabricated device consisting of two adjacent suspended membranes, each with a platinum resistance heater and thermometer, the thermal conductance of several individual SWCNTs has been directly measured over the temperature range of 100 to 490 K. The effects of Umklapp phonon-phonon scattering remain weak and the thermal conductance remains roughly proportional to the calculated ballistic conductance throughout the temperature range. The macroscopic thermal conductance increases with temperature throughout the temperature range indicating static scattering processes or contact thermal resistance dominate transport in this regime. These results are an order of magnitude lower than the predicted ballistic thermal conductance calculated for a defect-free (18,0) nanotube. The results contrast with thermal conductance measurements reported using a high-bias DC self heating method. The discrepancy is discussed in terms of the differences in the contact thermal resistance, defects, and measurement methods.

Download Full-text