Control of the outer diameter of thin carbon nanotubes synthesized by catalytic decomposition of hydrocarbons

2000 ◽  
Author(s):  
I. Willems
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Decomposition ◽  
Outer Diameter ◽  
Thin Carbon ◽  
Decomposition Of Hydrocarbons

Control of the outer diameter of thin carbon nanotubes synthesized by catalytic decomposition of hydrocarbons

2000 ◽  
Vol 317 (1-2) ◽  
pp. 71-76 ◽  
Author(s):  
I Willems ◽  
Z Kónya ◽  
J.-F Colomer ◽  
G Van Tendeloo ◽  
N Nagaraju ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Decomposition ◽  
Outer Diameter ◽  
Thin Carbon ◽  
Decomposition Of Hydrocarbons

ChemInform Abstract: Synthesis of Single-Wall Carbon Nanotubes by Catalytic Decomposition of Hydrocarbons.

ChemInform ◽  
2010 ◽  
Vol 30 (39) ◽  
pp. no-no
Author(s):  
J.-F. Colomer ◽  
G. Bister ◽  
I. Willems ◽  
Z. Konya ◽  
A. Fonseca ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Decomposition ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Decomposition Of Hydrocarbons

Growth of carbon nanotubes by catalytic decomposition of CH4 or CO on a NiMgO catalyst

Carbon ◽  
1997 ◽  
Vol 35 (10-11) ◽  
pp. 1495-1501 ◽  
Author(s):  
P. Chen ◽  
H.-B. Zhang ◽  
G.-D. Lin ◽  
Q. Hong ◽  
K.R. Tsai
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Decomposition

scholarly journals STUDY OF MUTAGENIC ACTIVITY NANO- AND MICROPARTICLES IN THE AMES TEST (SALMONELLA / MICROSOME)

2019 ◽  
Vol 98 (4) ◽  
pp. 455-460
Author(s):  
Lyudmila V. Akhaltseva ◽  
V. S. Zhurkov ◽  
L. P. Sycheva ◽  
O. N. Savostikova ◽  
A. V. Alekseeva
Keyword(s):  
Carbon Nanotubes ◽  
Ames Test ◽  
Mutagenic Activity ◽  
Dose Range ◽  
Gene Mutations ◽  
Outer Diameter ◽  
Multi Walled Carbon Nanotubes ◽  
Inner Diameter ◽  
Substitution Mutations ◽  
Walled Carbon Nanotubes

Introduction. One of the important steps in assessing the nanoparticles (NP) safety is the analysis of mutagenic activity, including the evaluation of gene, chromosomal, and genomic mutations. Material and methods. The purpose of this investigation is to study the ability of different NP aqueus suspensions and the same compounds in microforms to unduce gene mutations in Salmonella/microsome test (Ames test). Anatase titanium dioxide NP coated with simethicone (33.16 ± 16.7 nm, 5-50000 μg/ml), magnetite NP coated with silicate (10 nm, 0.92-575 μg/ml), silver NP coated with аrabian gum (14 ± 0.2 nm, 5-50000 μg/ml), aluminum hydroxide nanofibres (50-70 nm, 24-3000 μg/ml) and multi-walled carbon nanotubes (Taunit MWСNTs, outer diameter 15-40 nm, inner diameter 3-8 nm, length 2 and more microns, 5-50000 μg/ml). In parallel, the mutagenic activity of equivalent microparticles was evaluated in experiments. Ames test (Salmonella/microsomes) registers gene mutations induced by a different mechanism of action, in the variant with preincubation. A set of Salmonella typhimurium indicator strains: TA 100 (base pair substitution mutations), TA 98 and TA 97 (mutations of the frameshift type of the genetic code) were used. Using addition the S9 microsomal activating mixture during the experiment makes it is possible to determine the effect not only of the substances themselves, but also of their metabolites. Conclusion. The investigated nanomaterials as well as their micro analogs in the studied dose range did not induce gene mutations in the Ames test both in presence and absence microsomal activating mixture.

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