Effect of Different Functional Groups on the Free Radical Scavenging Capability of Single-Walled Carbon Nanotubes

2010 ◽  
Vol 114 (35) ◽  
pp. 14734-14739 ◽  
Author(s):  
Ana Martínez ◽  
Misaela Francisco-Marquez ◽  
Annia Galano
Keyword(s):  
Carbon Nanotubes ◽  
Free Radical ◽  
Functional Groups ◽  
Radical Scavenging ◽  
Single Walled Carbon Nanotubes ◽  
Free Radical Scavenging ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Aqueous electromigration of single-walled carbon nanotubes and co-electromigration with copper ions

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19628-19637 ◽  
Author(s):  
Pavan M. V. Raja ◽  
Gibran L. Esquenazi ◽  
Kourtney D. Wright ◽  
Cathren E. Gowenlock ◽  
Bruce E. Brinson ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Functional Groups ◽  
Copper Ions ◽  
Single Walled Carbon Nanotubes ◽  
Surface Functional Groups ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

The direction of electromigration of SWCNTs in the absence of surfactant depends on the presence of catalyst residue, surface functional groups and adsorbed metal ions.

scholarly journals Chemi- vs physisorption in the radical functionalization of single-walled carbon nanotubes under microwaves

2014 ◽  
Vol 5 ◽  
pp. 537-545 ◽  
Author(s):  
Victor Mamane ◽  
Guillaume Mercier ◽  
Junidah Abdul Shukor ◽  
Jérôme Gleize ◽  
Aziz Azizan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Functional Groups ◽  
Physical Adsorption ◽  
Reaction Times ◽  
Single Walled Carbon Nanotubes ◽  
Chemical Mechanisms ◽  
Single Walled Carbon ◽  
Chemical Grafting ◽  
Grafting From ◽  
Walled Carbon Nanotubes

The effect of microwaves on the functionalization of single-walled carbon nanotubes (SWNTs) by the diazonium method was studied. The usage of a new approach led to the identification of the strength of the interaction (physical or chemical) between the functional groups and the carbon nanotube surface. Moreover, the nature (chemical formula) of the adsorbed/grafted functional groups was determined. According to thermogravimetric analysis coupled with mass spectrometry and Raman spectroscopy, the optimal functionalization level was reached after 5 min of reaction. Prolonged reaction times can lead to undesired reactions such as defunctionalization, solvent addition and polymerization of the grafted functions. The strength (chemi- vs physisorption) of the bonds between the grafted functional groups and the SWNTs is discussed showing the occurrence of physical adsorption as a consequence of defunctionalization after 15 min of reaction under microwaves. Several chemical mechanisms of grafting could be identified, and it was possible to distinguish conditions leading to the desired chemical grafting from those leading to undesired reactions such as physisorption and polymerization.

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