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Atomic Configuration of Hetoroatomic and Functionalized Carbon Nanotubes probed via Spatially-Resolved EELS

Arenal, Raul (Universidad de Zaragoza, Zaragoza, ESP)

The modification of the atomic configuration of pristine carbon nanotubes (NTs) via the incorporation of heteroatoms (B, N or BN) or via the surface functionalization is a perfect way of control their opto-electronic properties [1-5]. However, it is worth noting that a very detailed analysis of this atomic configuration and concentration of the different species of these heteroatomic/functionalized nanotubes is highly required in order to determine their impact on the electronic/optoelectronic properties of the NTs. In this sense, TEM is an essential tool to perform such studies [1-5]. In particular, spatially-resolved electron energy loss spectroscopy (SR-EELS), developed in an aberration-corrected TEM (having access to a close to 1 angstrom electron probe), is the most powerful technique to achieve these goals. In this communication, we present a detailed study of the atomic configuration of different kinds of heteroatomic (CNx, BxCyNz) and functionalized single-walled NTs via SR- EELS [4-5]. We have examined the different chemical species present in the NTs, determined their average concentration as well as their spatial distribution within the walls and studied their chemical environment and bonding.

[1] R. Arenal, X. Blase, A. Loiseau, Advances in Physics 59, 101 (2010).

[2] P. Ayala, R. Arenal, A. Rubio, A. Loiseau, T. Pichler, Rev. Mod. Phys. 82, 1843 (2010).

[3] R. Arenal, K. March, C.P. Ewels, X. Rocquefelte, M. Kociak, A. Loiseau, O. Stéphan, Nano Lett. 14, 5509 (2014).

[4] R. Wang, A. Lopez-Bezanilla, A. Masseboeuf, M. Monthioux, R. Arenal, to be submitted.

[5] R. Arenal, L. Alvarez, S. Campidelli, R. Le Parc, J.-L. Bantignies, to be submitted.

[6] The research leading to these results has received funding from the EU under Grants Agreements 312483-ESTEEM2, 604391 Graphene Flagship and Marie Curie 642742 - Enabling Excellence, as well as from the Spanish Ministerio Economia y Competitividad (FIS2013-46159- C3-3-P).

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