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Investigation of the grafting of fluorophores onto double-walled carbon nanotubes: the influence of the geometry of the molecules

Lorne, Thomas and Jiménez-Ruiz, Mónica and Rols, Stéphane and Payrastre, Corinne and Escudier, Jean-Marc and Rubio-Zuazo, Juan and Zbiri, Mohamed and Galibert, Anne-Marie and Soula, Brigitte and Flahaut, Emmanuel Investigation of the grafting of fluorophores onto double-walled carbon nanotubes: the influence of the geometry of the molecules. (2018) Applied Surface Science, 457. 1181-1191. ISSN 0169-4332

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Official URL: https://doi.org/10.1016/j.apsusc.2018.06.303


The functionalization of nanoparticles is nowadays a standard procedure for many applications. Carbon nanotubes are no exception, and their functionalization has become an important part of the research effort these past decades. Nevertheless, there is still a lack of knowledge concerning the efficiency of the grafting processes, and more specifically concerning the question of the competition between covalent and non-covalent grafting when functionalized for example with aromatic fluorescent molecules. In a previous article, we investigated the grafting of fluorescein isothiocyanate onto double-walled carbon nanotubes. In order to explore the influence of the geometry of the fluorophore on the efficiency of the grafting processes, this work investigated the grafting of a streptocyanine onto the same carbon nanotubes using a combination of X-ray photoelectron spectroscopy, inelastic neutron scattering spectroscopy and computational simulations. The selected streptocyanine presents a very different geometry compared to FITC. Nevertheless, we show that, as in the case of FITC, both covalent and non-covalent grafting occurred simultaneously and that a comparable fraction of the fluorophore remained simply adsorbed onto the DWNTs despite thorough washings, indicating that the geometry of the streptocyanine did not exhibit the expected influence on the grafting process efficiency.

Item Type:Article
HAL Id:hal-01878747
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > European Synchrotron Radiation Facility - ESRF (FRANCE)
Other partners > Institut Laue-Langevin - ILL (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Université Paul Sabatier Toulouse 3 - Institut Laue Langevin
Deposited On:21 Sep 2018 11:51

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