Options
Synthesis of dendrimer-carbon nanotube conjugates
Auteur(s)
Garcia, A
Herrero, M A
Frein, Stéphane
Munoz, R
Bustero, I
Toma, F
Prato, Maurizio
Maison d'édition
: Wiley-V C H Verlag Gmbh
Date de parution
2007
De la page
1402
A la page
1407
Résumé
We describe, the coupling between Carbon Nanotubes (CNTs) and a second-generation cyanophenyl-based dendrimer. The goal of our work is the synthesis of highly functionalized CNTs without provoking damage to the conjugated pi-system. One approach is the attachment of dendrimers with a high density of functional groups to the CNTs. These groups serve as anchor points for further reactions. With this aim, we have carried out a primary modification on CNTs by the use of 1,3 dipolar cycloaddition reaction. We have employed Single Wall Carbon Nanotubes (SWNTs) as well as Multi Wall Carbon Nanotubes (MWNTs) obtaining 238 mu mol and 511 mu mol of pyrrolidine groups per gram, respectively. The amount of amino groups introduced in the system was measured by the Kaiser test as well as thermogravimetric analyses. As a second step, dendrimer incorporation was performed by carbodiimide chemistry. Thermogravimetric Analysis, Raman Spectroscopy and Atomic Force Microscopy characterization techniques are reported for the characterization of the final CNT-dendrimer conjugate. The results show that the dendrimer has been attached covalently to the previously generated amine groups. Morphologically, the attached dendrimer with an estimated theoretical molecular length of 6.4 nm, generates a wrapping of 8 nm thick around the CNTs walls. [GRAPHICS] Scheme of the synthesized CNT-dendrimer conjugate. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Nom de l'événement
8th International Conference on Trends in Nanotechnology (TNT2007)
Lieu
San Sebastian, SPAIN
Type de publication
Resource Types::text::conference output::conference proceedings::conference paper
