Growth of Carbon Nanotubes with Controlled Morphologies

2002 ◽  
Vol 728 ◽  
Author(s):  
Lifeng Dong ◽  
Jun Jiao ◽  
Catherine L. Mosher ◽  
Sean Foxley
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Source ◽  
Single Walled Carbon Nanotubes ◽  
Average Diameter ◽  
Silicon Substrates ◽  
Average Growth Rate ◽  
Average Growth ◽  
Carbon Particles ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractThe alignment, orientation and morphologies of multi-walled carbon nanotubes (MWNTs) can be tailored by controlling catalyst deposition on porous silicon substrates. During the growth of MWNTs, H2 promoted the growth of carbon nanotubes and prevented the formation of amorphous carbon particles. With the introduction of H2, the average diameter of MWNTs decreased from 130 nm to 15 nm, and the average growth rate of nanotubes increased from 50 nm/s to 145 nm/s. The use of CH4 as the carbon source resulted in single-walled carbon nanotubes (SWNTs) with an average diameter of 2 nm, and the use of C2H2 as the carbon source resulted in MWNTs with an average diameter of 15 nm.

Diameter-Controlled Synthesis of Single-Walled Carbon Nanotubes

2013 ◽  
Vol 652-654 ◽  
pp. 151-154
Author(s):  
Ting Kai Zhao ◽  
Xing Zhao ◽  
Jin Yan ◽  
Li Du ◽  
Tie Hu Li
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Recent Decade ◽  
Diameter Distribution ◽  
Future Directions ◽  
Single Walled Carbon ◽  
Existing Problems ◽  
Multi Walled Carbon Nanotubes ◽  
Synthesis Of Carbon Nanotubes ◽  
Walled Carbon Nanotubes

With the technological progress in the synthesis of multi-walled carbon nanotubes and single-walled carbon nanotubes, more attention was attracted to the synthesis of carbon nanotubes with diameter distribution, ideal length, different chirality and certain orientation. In recent decade, all these factors have been investigated and a number of progresses have been made for the application of carbon nanotubes. The latest researches on the growth of diameter-controlled single-walled carbon nanotubes are reviewed and discussed. The existing problems and challenges of the synthesis processes have been addressed in the future directions.

scholarly journals Low Temperature Growth of Single-Walled Carbon Nanotubes from Pt Catalysts under Low Ethanol Pressure by Alcohol Gas Source Method

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Hiroki Kondo ◽  
Naoya Fukuoka ◽  
Takahiro Maruyama
Keyword(s):  
Carbon Nanotubes ◽  
High Vacuum ◽  
Single Walled Carbon Nanotubes ◽  
Average Diameter ◽  
Diameter Distribution ◽  
Pt Catalysts ◽  
Single Walled Carbon ◽  
Source Method ◽  
Gas Source ◽  
Walled Carbon Nanotubes

Growth of single-walled carbon nanotubes (SWNTs) was carried out on SiO2/Si substrates with Pt catalysts at 400, 450, and 700°C under various ethanol pressures using an alcohol gas source method in a high vacuum, and the grown SWNTs were characterized by scanning electron microscopy (SEM) and Raman spectroscopy. Irrespective of the growth temperature, both G band and RBM peaks were observed in the Raman spectra under the optimal ethanol pressure (~1×10−3Pa), indicating that SWNTs grew below 450°C from Pt. At 400°C, both average diameter and diameter distribution were drastically reduced, and those were fairly smaller and narrower, compared to those for SWNTs grown with Co.

Synthesis of a poly(amidoamine) dendrimer having a 1,10-bis(decyloxy)decane core and its use in fabrication of carbon nanotube/calcium carbonate hybrids through biomimetic mineralization

2017 ◽  
Vol 95 (9) ◽  
pp. 935-941 ◽  
Author(s):  
Shunichi Nishimura ◽  
Tomoyuki Tajima ◽  
Tatsuki Hasegawa ◽  
Tomoaki Tanaka ◽  
Yutaka Takaguchi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Calcium Carbonate ◽  
Single Walled Carbon Nanotubes ◽  
Carboxyl Groups ◽  
Biomimetic Mineralization ◽  
Diffusion Technique ◽  
Aqueous Environments ◽  
Noncovalent Functionalization ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A new dendritic dispersant of carbon nanotubes (CNTs) was synthesized and applied for the noncovalent functionalization of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). The 1,10-bis(decyloxy)decane core of the poly(amidoamine) dendrimer strongly adhered to the sidewalls of CNTs to form CNT/dendrimer supramolecular nanocomposites having many carboxyl groups (–COOH) on the surface. Then, crystallization of calcium carbonate (CaCO3) by the CO2 diffusion technique in aqueous environments using the CNT/dendrimer supramolecular nanocomposites as scaffolds afforded monodisperse spherical CNT/CaCO3 nanohybrids consisting of CNTs and calcite nanocrystals. The morphologies of the SWCNT/CaCO3 hybrids and MWCNT/CaCO3 hybrids were almost the same.

scholarly journals Adsorption of Sulfamethazine Drug onto the Modified Derivatives of Carbon Nanotubes at Different pH

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2489 ◽  
Author(s):  
Hiba Mohamed Ameen ◽  
Sándor Kunsági-Máté ◽  
Péter Noveczky ◽  
Lajos Szente ◽  
Beáta Lemli
Keyword(s):  
Carbon Nanotubes ◽  
Drug Interaction ◽  
Carbon Nanotube ◽  
Adsorption Capacity ◽  
Removal Efficiency ◽  
Adsorption Process ◽  
Single Walled Carbon Nanotubes ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Derivatives Of

The sulfamethazine drug interaction with carbon nanotubes was investigated with the aim of improving the adsorption capacity of the adsorptive materials. Experiments were performed to clarify how the molecular environment affects the adsorption process. Single-walled carbon nanotubes have a higher removal efficiency of sulfamethazine than pristine or functionalized multi-walled carbon nanotubes. Although the presence of cyclodextrin molecules improves the solubility of sulfamethazine, it reduces the adsorption capacity of the carbon nanotube towards the sulfamethazine drug and, therefore, inhibits the removal of these antibiotic pollutants from waters by carbon nanotubes.

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