Development of Transparent Conductive Single-Walled Carbon Nanotubes Films

2012 ◽  
Author(s):  
E. Kok ◽  
J. N. Tey ◽  
J. Wei
Keyword(s):  
Carbon Nanotubes ◽  
Sheet Resistance ◽  
Single Walled Carbon Nanotubes ◽  
Tube Length ◽  
Agarose Gel ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

In our research, we aim to formulate SWNTs ink and develop a methodology to create enhanced conductive flexible transparent SWNTs films that have the potential to possibly reduce the use of ITO. In our preliminary findings, we achieved a sheet resistance of 25.1 kΩ/sq with ∼93% transparency (excluding film) by spraying a unsorted purified pristine SWNTs. In-house separated M-SWNTs, prepared using agarose gel separation methods, were sprayed with sheet resistance of 3.3 kΩ/sq and ∼86% transparent.. Investigation of tube length with respect to conductivity was also studied — nanotubes were sonicated for different durations (thus affecting tube length) before separation and spraying.

ROLE OF THREE-PHONON AND FOUR-PHONON PROCESSES IN THERMAL TRANSPORT OF SINGLE-WALLED CARBON NANOTUBES

2013 ◽  
Vol 27 (16) ◽  
pp. 1350117 ◽  
Author(s):  
P. SAPNA ◽  
T. J. SINGH
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Independent Effect ◽  
Tube Length ◽  
Single Walled Carbon ◽  
Optical Modes ◽  
Semiconducting Nanotubes ◽  
Walled Carbon Nanotubes

Thermal conductivity of single-walled carbon nanotubes has been calculated considering the three-phonon and four-phonon processes. The contribution of the acoustic modes and optical modes in the relaxation rate of the phonon–phonon interaction and hence to the thermal conductivity have been considered. The thermal conductivity has been calculated for the (8, 0), (10, 0), (11, 0) and (13, 0) zigzag semiconducting nanotubes having different radii. It is found that the thermal conductivity increases linearly at low temperatures which is nearly T2 below 30 K and after reaching a peak, it decreases as aT-1 - bT-2 where a and b are constants and b > a at higher temperatures. It is also found that the thermal conductivity increases with increasing radius of the tube due to the independent effect of three-phonon process and four-phonon process. The thermal conductivity is also found to decrease with increasing tube length due to four-phonon process.

Molecular Dynamics Simulation of Thermal Conductivity of Single-Walled Carbon Nanotubes Filled With Water

2008 ◽  
Author(s):  
Li Deng ◽  
Yunfei Chen ◽  
Ruiming Qian ◽  
Juekuan Yang ◽  
Kedong Bi
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Single Walled Carbon Nanotubes ◽  
Phonon Transport ◽  
Dynamics Simulation ◽  
Tube Length ◽  
Water Molecules ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Thermal Conductivities

Thermal conductivities for single-walled carbon nanotubes (SWNTs) filled with water are calculated with non-equilibrium molecular dynamics (NEMD) simulation method. Simulation results demonstrate the thermal conduction for the tube filed with water is better than the pure nanotube at the same conditions. It is believed the translational movement of the water molecules along the tube axis helps carry energy from the hot bath to the heat sinks, which results in the increase of the thermal conductivities. In addition, with the introduction of the water molecules into the nanotube, the additional interaction between the carbon atoms and the water molecules provide extra channels for phonon transport, which further intensifies the energy transport along the nanotubes. The effects of the temperature variation and the tube length on the thermal conductivities are also analyzed in this paper.

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes
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