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Charged iodide in chains behind the highly efficient iodine doping in carbon nanotubes

Zubair, Ahmed and Tristant, Damien and Nie, Chunyang and Tsentalovich, Dmitri E. and Headrick, Robert J. and Pasquali, Matteo and Kono, Junichiro and Meunier, Vincent and Flahaut, Emmanuel and Monthioux, Marc and Gerber, Iann C. and Puech, Pascal Charged iodide in chains behind the highly efficient iodine doping in carbon nanotubes. (2017) Physical Review Materials, 1 (6). 1-7. ISSN 2475-9953

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Official URL: https://doi.org/10.1103/PhysRevMaterials.1.064002


The origin of highly efficient iodine doping of carbon nanotubes is not well understood. Relying on firstprinciples calculations, we found that iodine molecules (I2) in contact with a carbon nanotube interact to form monoiodide or/and polyiodide from two and three I2 as a result of removing electrons from the carbon nanotube (p-type doping). Charge per iodine atom for monoiodide ion or iodine atom at end of iodine chain is significantly higher than that for I2. This atomic analysis extends previous studies showing that polyiodide ions are the dominant dopants. Moreover, we observed isolated I atoms in atomically resolved transmission electron microscopy, which proves the production of monoiodide. Finally, using Raman spectroscopy, we quantitatively determined the doping level and estimated the number of conducting channels in high electrical conductivity fibers composed of iodine-doped double-wall carbon nanotubes.

Item Type:Article
HAL Id:hal-01867475
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Guangdong University of Technology - GUT (CHINA)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Other partners > Rice University (USA)
Other partners > Rensselaer Polytechnic Institute - RPI (USA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:08 Jan 2019 14:26

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