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O: Fachverband Oberflächenphysik

O 66: Poster: Nanostructures at Surfaces

O 66.16: Poster

Wednesday, March 20, 2024, 18:00–20:00, Poster C

Modification of Single-Walled Carbon Nanotubes Using MeV Heavy Ions — •Ayman Sherif El-Said¹, Rene Heller², and Stefan Facsko² — ¹Physics Department and Interdisciplinary Research Center for Advanced Materials, KFUPM, Dhahran 31261, Saudi Arabia — ²Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01328 Dresden, Germany

Highly energetic heavy ions are used efficiently for tailoring the properties of various nanomaterials [1]. Among the recently investigated advanced materials, the carbon-based ones have attracted a lot of interests due to their promising properties for a wide variety of technological applications [2]. Here, we focus on the structural modifications of single-walled carbon nanotubes (SWCNTs) by irradiation with MeV iodine ions from the tandem accelerators at the Ion Beam Center of HZDR. The ion irradiation leads to fragmentation of the nanotubes into broken segments after surpassing of a specific ion-fluence threshold [3]. Moreover, the Raman spectroscopic measurements show that the disorder parameter increases as a function of ion fluence. Different approaches are discussed for the explanation of the mechanisms responsible for the observed ion-induced changes in SWCNTs.

[1] F. Aumayr, S. Facsko, A.S. El-Said, C. Trautmann, M. Schleberger, J. Phys.: Condens. Matter 23, 393001 (2011).

[2] F.L. Michael et al., Science 339, 535 (2013).

[3] A.S. El-Said, S. Rao, S. Akhmadaliev, S. Facsko, Phys. Rev. Applied 13, 044073 (2020).

Keywords: Heavy Ions; Carbon Nanotubes; Nanostructures