Oxidation of graphene on Ru(0001) studied by scanning tunneling microscopy

Liao, Qinhong; Zhang, H.J.; Wu, Ke; Li, H.Y.; Bao, Sheng; He, Pimo

doi:10.1016/j.apsusc.2010.06.037

Cited by 17 publications

(19 citation statements)

References 30 publications

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“…Structural changes of graphene layers on Ru(0001) and Cu(111) were also reported due to oxidation by water vapor and oxygen. It was found that water and oxygen molecules can react at the line defects of graphene which splits and distorts graphene structure [152,153].…”

Section: Environmental Effect On Friction and Wear Of Carbon Materialsmentioning

confidence: 99%

Vapors in the ambient—A complication in tribological studies or an engineering solution of tribological problems?

et al. 2015

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Tribology involves not only two-body contacts of two solid materials-a substrate and a counter-surface; it often involves three-body contacts whether the third body is intentionally introduced or inevitably added during the sliding or rubbing. The intentionally added third body could be lubricant oil or engineered nanomaterial used to mitigate the friction and wear of the sliding contact. The inevitably added third body could be wear debris created from the substrate or the counter surface during sliding. Even in the absence of any solid third-body between the sliding surfaces, molecular adsorption of water or organic vapors from the surrounding environment can dramatically alter the friction and wear behavior of solid surfaces tested in the absence of lubricant oils. This review article covers the last case: the effects of molecular adsorption on sliding solid surfaces both inevitably occurring due to the ambient test and intentionally introduced as a solution for engineering problems. We will review how adsorbed molecules can change the course of wear and friction, as well as the mechanical and chemical behavior, of a wide range of materials under sliding conditions.

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Section: Environmental Effect On Friction and Wear Of Carbon Materialsmentioning

confidence: 99%

Vapors in the ambient—A complication in tribological studies or an engineering solution of tribological problems?

et al. 2015

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“…Recent experiments, however, show that many gases can intercalate under graphene flakes grown on metal surfaces [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Particularly, oxygen intercalation at the graphene/metal interfaces in O 2 atmosphere and at elevated temperatures has been reported [16][17][18][19].…”

Section: Introductionmentioning

confidence: 98%

Facile oxygen intercalation between full layer graphene and Ru(0001) under ambient conditions

Dong

Wei

et al. 2015

Surface Science

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Graphene coatings have been widely considered as protection layers on metal surfaces to prevent surface oxidation and corrosion in gaseous atmospheres. Here, using in-situ ambient pressure X-ray photoelectron spectroscopy we demonstrate that oxygen intercalation readily occurs at full monolayer graphene/Ru(0001) interfaces in 0.5 Torr O 2 around 150°C, resulting in decoupling of the graphene overlayer from the Ru surface and oxidation of the metal surface. Moreover, oxygen intercalation has been observed even upon illumination of the graphene/ Ru(0001) surface with an infrared lamp in air. These results indicate that the stability of graphene/metal interfaces under ambient conditions should be taken into consideration for future applications.

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“…If graphene is single layer it can store more hydrogen as compare to bilayer or few layers. The analyse of multilayers of graphene on to the surface of Ru (0001) substrate by scanning tunnelling microscopy (STM) technique represented moiré patterns of superstructure as shown in Figure 16 [62]. Moiré pattern is generated due to the rotational misorientation between the layers.…”

Section: Graphene and Graphanementioning

confidence: 99%

“…Graphene is one atom thick hexagonally arranged carbon material and whenever layers are stacking together (due to the van-der Walls forces) moiré pattern is observed. In the moiré pattern it was analyzed 12 stacking faults of graphene sheets with 2.46 Å typical lattices spacing of graphite [62]. The unit cell is marked as a rhombus [62].…”

Section: Graphene and Graphanementioning

confidence: 99%