Chemical Vapor Deposition-Grown Graphene: The Thinnest Solid Lubricant

Abstract

As an atomically thin material with low surface energy, graphene is an excellent candidate for reducing adhesion and friction when coated on various surfaces. Here, we demonstrate the superior adhesion and frictional characteristics of graphene films which were grown on Cu and Ni metal catalysts by chemical vapor deposition and transferred onto the SiO(2)/Si substrate. The graphene films effectively reduced the adhesion and friction forces, and multilayer graphene films that were a few nanometers thick had low coefficients of friction comparable to that of bulk graphite.

Percolative Electrical Conductivity of Platy Alumina/Few-layer Graphene Multilayered Composites

“…This high amount of CNTs or whisker for toughening impedes considerably sintering of ceramics, which requires highpressure densification processes such as hot pressing and spark plasma sintering. Furthermore, in the case of CNT/ceramic composites [3][4][5][6][7][8] , in which the reinforcement concentration is high, the strength value was reported to be decreased as a result of relatively high structural flaw concentration 9 . The result that the peak K IC values were observed at the reinforcement concentration of 0.25-0.5 vol%, is consistent with theoretical graphene concentration (,0.34 vol%) for the complete monolayer coverage of alumina precursor (,300 nm) considering the theoretical surface area of single-layer graphene (,2630 m 2 /g).…”

“…In the case of carbon nanotube (CNT), it has been reported that higher reinforcement concentration (1 , 10 vol%) was generally required for the toughening and strengthening of CNT/ceramic composites [2][3][4][5][6][7][8] . Moreover, graphene is a good candidate for solid lubrication that reduces the friction force between contact surfaces at micro-and nano-scale while protecting the coated surface [9][10] . A nanometer-thick surface layer of hard, strong, and lubricating graphene on ceramic grains can lead to a significant improvement in contact-damage resistance, such as wear resistance due to a tribological effect of 2-dimensional (2D) graphene.…”

“…A nanometer-thick surface layer of hard, strong, and lubricating graphene on ceramic grains can lead to a significant improvement in contact-damage resistance, such as wear resistance due to a tribological effect of 2-dimensional (2D) graphene. However, previous studies on graphene tribology have focused on nano-scale friction and wear behavior (normal load ,250 mN) [9][10][11] . On the other hand, micro-/macro-scale tribological studies of graphene have remained relatively unexplored, but there is an increasing need to utilize graphene's full potential for diverse tribological applications.…”

Three-Dimensional Graphene Interconnected Structure, Fabrication Methods and Applications: Review

“…Template-assisted chemical vapour deposition growth: Chemical Vapour Deposition (CVD) is one of the ways to grow 3D grapheme [25][26][27][28][29][30][31][32]. It entails using pre-fabricated 3D metal substrates for example Ni foam.…”

Optical-assistant characterization of friction anisotropy properties of single-crystal graphene domains

“…Meanwhile, as the important method of graphene fabrication, the CVD has shown greater potential for fabricating large area single-crystal graphene. So many efforts have been dedicated to the researches on friction properties of CVD graphene [43][44][45]. Furthermore, the AFM has always been viewed as the invaluable tool for nanoscale character instead of atomic resolution.…”