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Covalent Functionalization of HiPco Single‐Walled Carbon Nanotubes: Differences in the Oxidizing Action of H2SO4 and HNO3 during a Soft Oxidation Process |
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| Authors: | Dr. Xavier Devaux Dr. Brigitte Vigolo Dr. Edward McRae Dr. Fabrice Valsaque Naoual Allali Dr. Victor Mamane Prof. Yves Fort Prof. Alexander V. Soldatov Dr. Manuel Dossot Dr. Svetlana Yu. Tsareva |
| Affiliation: | 1. Institut Jean Lamour, UMR 7198 CNRS‐Université de Lorraine, Faculté des Sciences et Technologies, Boulevard des Aiguillettes, BP 70239, 54506 Vand?uvre‐lès‐Nancy (France);2. Laboratoire de Structure et Réactivité des Systèmes Moléculaires Complexes, UMR 7565 CNRS‐Université de Lorraine, Faculté des Sciences et Techniques, Boulevard des Aiguillettes, BP 70239, 54506 Vand?uvre‐lès‐Nancy (France);3. Lule? University of Technology, Department of Engineering Sciences and Mathematics, SE‐97187, Lule? (Sweden);4. Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564, CNRS‐Université de Lorraine, 405 rue de Vand?uvre, 54601 Villers‐lès‐Nancy (France);5. Institut de Chimie de Strasbourg, UMR 7177, Equipe LASYROC, Université de Strasbourg, 1 rue Blaise Pascal BP 296 R8, 67008 Strasbourg (France);6. Department of Physics, Harvard University, Cambridge MA 02138 (USA) |
| Abstract: | The results of a study on the evolution of HiPco single‐walled carbon nanotubes during the oxidizing action of H2SO4 and HNO3 are presented. The process conditions used have been chosen so as to avoid any significant damage to the nanotube structure. The type and level of functionalization, the location of the grafted functions on the surface of the nanotube and the changes in morphological characteristics of the samples were examined by using a wide and complementary range of analytical techniques. We propose an explanation for the differences in the oxidizing action of sulfuric and nitric acids. The combined results allow us to suggest possible reaction mechanisms that occur on the surface of the nanotube. |
| Keywords: | nanostructures nanotubes oxidation surface analysis surface chemistry |