Please use this identifier to cite or link to this item:
Title: The role of charge distribution on the friction coefficients of epitaxial graphene grown on the Si-terminated and C-terminated faces of SiC
Authors: Keskin, Yasemin
Ünverdi, Özhan
Erbahar, Doğan
Kaya, İsmet İnönü
Çelebi, Cem
Keywords: Epitaxial graphene
Friction force
Issue Date: 2021
Publisher: Pergamon-Elsevier Science Ltd
Abstract: The friction coefficients of single-layer epitaxial graphene grown on the Si-terminated and C-terminated faces of Silicon Carbide (SiC) substrate were measured under ambient conditions using Friction Force Microscope (FFM). The lateral friction force measurements acquired in the applied normal force range between 4.0 and 16.0 nN showed that the friction coefficient of graphene on the C-terminated face of SiC is about two times smaller than the one grown on its Si-terminated face. The lateral friction was found to be decreased as the average of root mean square roughness increases suggesting the observed difference in the friction coefficients cannot be related to the roughness of the graphene layers. DFT calculations demonstrated that the altered periodicity of charge distribution on graphene due to the specific interactions with two distinct polar faces of SiC substrate might explain the observed difference in the friction coefficients. (C) 2021 Elsevier Ltd. All rights reserved.
ISSN: 0008-6223
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File SizeFormat 
  Until 2025-01-01
1.72 MBAdobe PDFView/Open    Request a copy
Show full item record

CORE Recommender

Page view(s)

checked on Mar 27, 2023

Google ScholarTM



Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.