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Lecture

WEB Spatially-Resolved EELS Studies on Functionalized Carbon Nanotubes



Surface functionalization of 1D and 2D nanomaterials is a perfect way for controlling their properties [1-7]. Very detailed structural and chemical composition analyses, at the atomic scale, of such surface modifications are required in order to determine their impact on the electronic/optoelectronic properties. Transmission electron microscopy (TEM) and in particular, spatially-resolved electron energy loss spectroscopy (SR-EELS) developed in an aberration-corrected TEM, is the most powerful technique to get this information. Indeed, having access to a close to 1 angstrom electron probe, the atomic configuration and concentration of the different species of these functionalized nanomaterials can be obtained [1-7].


In this communication, we present an in-depth study of the atomic configuration of non-covalent functionalized (pi-stacked and endohedral) single-walled carbon nanotubes via SR-EELS [1-7]. We have investigated the different chemical species, determined their spatial distribution and studied their chemical environment. These studies confirm the supramolecular organization of the organic moieties (in this present case, iron-phthalocyanines) used for the functionalization of the NTs [1]. In summary, these works provide very rich information about these hybrid and complex nanomaterials, opening fascinating perspectives for optoelectronic applications of such nanosystems. All these aspects will be discussed in this contribution.



1. R. Arenal, L. Alvarez, J.-L. Bantignies, Submitted.

2. R. Canton-Vitoria, T. Scharl, A. Stergiou, A. Cadranel, R. Arenal, D.M. Guldi, N. Tagmatarchis, “Angewandte (2020).

3. L. Vallan, R. Canton-Vitoria, H. Gobeze, Y. Jang, R. Arenal, A. Benito, W. Maser, F. D'Souza, N. Tagmatarchis, J. Am. Chem. Soc. (2018).

4. R. Canton-Vitoria, Y. Sayed-Ahmad Baraza, M. Pelaez-Fernandez, R. Arenal, C. Bittencourt, C.P. Ewels, N. Tagmatarchis, Nat. Pub. Gr. 2D Mat. & Appl. (2017).

5. F. Ernst, Z. Gao, R. Arenal, T. Heek, A. Setaro, R. Fernandez-Pacheco, R. Haag, L. Cognet, S. Reich, J. Phys. Chem. C (2017).

6. A. Setaro, M. Adeli, M. Glaeske, D. Przyrembel, T. Bisswanger, G. Gordeev, M. Weinelt, R. Arenal, R. Haag, S. Reich, Nat. Comm. (2017).

7. The research leading to these results has received funding from the EU under Grant Agreements 823717 “ESTEEM3”, 785219 & 881603 Graphene Flagship and FLAG-ERA “GATES” (JTC-PCI2018-093137) as well as from the Spanish MINECO (MAT2016-79776-P (AEI/FEDER, UE)).

 

Speaker:
Ph.D. Raul Arenal
Universidad de Zaragoza