scholarly journals Ab initiostudy of the dielectric response of crystalline ropes of metallic single-walled carbon nanotubes: Tube-diameter and helicity effects

2008 ◽  
Vol 78 (23) ◽  
Author(s):  
A. G. Marinopoulos ◽  
Lucia Reining ◽  
Angel Rubio
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Response ◽  
Single Walled Carbon Nanotubes ◽  
Tube Diameter ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Metal Cluster Size-Dependent Activation Energies of Growth of Single-Chirality Single-Walled Carbon Nanotubes Inside Metallocene-Filled Single-Walled Carbon Nanotubes

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2649
Author(s):  
Marianna V. Kharlamova ◽  
Christian Kramberger
Keyword(s):  
Carbon Nanotubes ◽  
Metal Cluster ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Activation Energies ◽  
Tube Diameter ◽  
Ni Catalyst ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Catalytic Particles

By combining in situ annealing and Raman spectroscopy measurements, the growth dynamics of nine individual-chirality inner tubes (8,8), (12,3), (13,1), (9,6), (10,4), (11,2), (11,1), (9,3) and (9,2) with diameters from ~0.8 to 1.1 nm are monitored using a time resolution of several minutes. The growth mechanism of inner tubes implies two successive stages of the growth on the carburized and purely metallic catalytic particles, respectively, which are formed as a result of the thermally induced decomposition of metallocenes inside the outer SWCNTs. The activation energies of the growth on carburized Ni and Co catalytic particles amount to 1.85–2.57 eV and 1.80–2.71 eV, respectively. They decrease monotonically as the tube diameter decreases, independent of the metal type. The activation energies of the growth on purely metallic Ni and Co particles equal 1.49–1.91 eV and 0.77–1.79 eV, respectively. They increase as the tube diameter decreases. The activation energies of the growth of large-diameter tubes (dt = ~0.95–1.10 nm) on Ni catalyst are significantly larger than on Co catalyst, whereas the values of small-diameter tubes (dt = ~0.80–0.95 nm) are similar. For both metals, no dependence of the activation energies on the chirality of inner tubes is observed.

scholarly journals Equimolar mixtures of aqueous linear and branched SDBS surfactant simulated on single walled carbon nanotubes

RSC Advances ◽  
2015 ◽  
Vol 5 (109) ◽  
pp. 90049-90060 ◽  
Author(s):  
Manaswee Suttipong ◽  
Alberto Striolo
Keyword(s):  
Carbon Nanotubes ◽  
Self Assembly ◽  
Surface Coverage ◽  
Single Walled Carbon Nanotubes ◽  
Tube Diameter ◽  
The Self ◽  
Single Walled Carbon ◽  
Surfactant Aggregates ◽  
Walled Carbon Nanotubes

The self-assembly of mixed SDBS surfactant aggregates is strongly dependent on surface coverage, but not on tube diameter.

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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