Anisotropic Friction of Wrinkled Graphene Grown by Chemical Vapor Deposition

ACS Applied Materials & Interfaces
Fei LongReza Shahbazian-Yassar

Abstract

Wrinkle structures are commonly seen on graphene grown by the chemical vapor deposition (CVD) method due to the different thermal expansion coefficient between graphene and its substrate. Despite the intensive investigations focusing on the electrical properties, the nanotribological properties of wrinkles and the influence of wrinkle structures on the wrinkle-free graphene remain less understood. Here, we report the observation of anisotropic nanoscale frictional characteristics depending on the orientation of wrinkles in CVD-grown graphene. Using friction force microscopy, we found that the coefficient of friction perpendicular to the wrinkle direction was ∼194% compare to that of the parallel direction. Our systematic investigation shows that the ripples and "puckering" mechanism, which dominates the friction of exfoliated graphene, plays even a more significant role in the friction of wrinkled graphene grown by CVD. The anisotropic friction of wrinkled graphene suggests a new way to tune the graphene friction property by nano/microstructure engineering such as introducing wrinkles.

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Citations

Feb 21, 2019·Advanced Materials·Jung Hwa KimZonghoon Lee
Mar 30, 2020·Nature Communications·Charalampos AndroulidakisCostas Galiotis
May 26, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Zhewei HuangBin Shen
Nov 16, 2018·ACS Applied Materials & Interfaces·Manoj TripathiNicola Maria Pugno
Jul 28, 2019·ACS Applied Materials & Interfaces·Wenjiang LuHua-Xin Peng
May 2, 2018·The Journal of Physical Chemistry Letters·Junhui SunLiping Wang
Aug 14, 2020·The Journal of Physical Chemistry Letters·Mohammad R VazirisereshkAshlie Martini
Aug 14, 2020·Nano Letters·Bing DengHailin Peng

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