Proton energy loss in multilayer graphene and carbon nanotubes |
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| Authors: | Juan D Uribe Mario Mery Bernardo Fierro Raul Cardoso-Gil Isabel Abril Rafael Garcia-Molina |
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| Institution: | 1. Departamento de Física, Laboratorio de Colisiones Atómicas, Universidad Técnica Federico Santa María, Espa?a, Valparaíso, Chile;2. Max Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany;3. Departament de Física Aplicada, Universitat d’Alacant, Alacant, Spain;4. Departamento de Física – Centro de Investigación en óptica y Nanofísica, Universidad de Murcia, Murcia, Spain |
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| Abstract: | Results of a study of electronic energy loss of low keV protons interacting with multilayer graphene targets are presented. Proton energy loss shows an unexpectedly high value as compared with measurements in amorphous carbon and carbon nanotubes. Furthermore, we observe a classical linear behavior of the energy loss with the ion velocity but with an apparent velocity threshold around 0.1?a.u., which is not observed in other carbon allotropes. This suggests low dimensionality effects which can be due to the extraordinary graphene properties. |
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