Wear properties of graphene edges probed by atomic force microscopy based lateral manipulation

Vasić, Borislav; Matković, Aleksandar; Gajić, Radoš; Stanković, Igor

doi:10.1016/j.carbon.2016.06.073

Cited by 48 publications

(45 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We observed similar frictional behavior for the CVD as well as for the ME graphene figure (S3-S5). The obtained friction data are in close agreement and with the measurements carried by Vasiƈ et al 19 . The influence of air-borne impurities induced friction is also studied by a separate friction measurement in controlled nitrogen atmosphere complemented with FEM simulation (figure S6).…”

Section: Resultssupporting

confidence: 91%

Friction and Adhesion of Different Structural Defects of Graphene

Tripathi

Awaja

Bizão

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

Section: Resultssupporting

confidence: 91%

Friction and Adhesion of Different Structural Defects of Graphene

Tripathi

Awaja

Bizão

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…After passing the vacancy, the tip feels a large attractive force from the vacancy again. The enhanced frictional force in the vicinity of the vacancy defect is in agreement with that in the previous works about the monovacancy-defective graphene [29,30], and the sharp variations in tip-surface potentials and frictional forces can be attributed to the Schwoebel-Ehrlich barriers [31,32], which have been already observed in the friction at the atomic-scale surface steps of graphene [34][35][36]38] and MoS 2 [37].…”

Section: Resultssupporting

confidence: 91%

“…In the presence of the vacancy defects, the surface state is similar to that of the atomic-scale surface steps. According to previous LFM studies on the monovacancy-defective graphene [29,30] and the stepped surfaces [34][35][36][37][38], there is the Schwoebel-Ehrlich barrier existing in the vicinity of the vacancy defect, and hence the long-range interactions V long are varying, which means a second contribution to the tip-surface interaction potential should be considered. A modified interaction potential V total containing the periodic interaction V int (x t , y t ) between the tip and surface as well as the sharply increasing potential barrier at the vacancy defect site simulating the long-range interaction potential V long is constructed to reflect the tip-surface interaction of the defective graphene and SLMoS 2 with monovacancy defects, which is shown as follows:…”

Section: Simulation Model and Methodsmentioning

confidence: 99%

Atomic-Scale Friction on Monovacancy-Defective Graphene and Single-Layer Molybdenum-Disulfide by Numerical Analysis

Pang

Wang

et al. 2020

Nanomaterials

View full text Add to dashboard Cite

Using numerical simulations, we study the atomic-scale frictional behaviors of monovacancy-defective graphene and single-layer molybdenum-disulfide (SLMoS2) based on the classical Prandtl–Tomlinson (PT) model with a modified interaction potential considering the Schwoebel–Ehrlich barrier. Due to the presence of a monovacancy defect on the surface, the frictional forces were significantly enhanced. The effects of the PT model parameters on the frictional properties of monovacancy-defective graphene and SLMoS2 were analyzed, and it showed that the spring constant of the pulling spring cx is the most influential parameter on the stick–slip motion in the vicinity of the vacancy defect. Besides, monovacancy-defective SLMoS2 is found to be more sensitive to the stick–slip motion at the vacancy defect site than monovacancy-defective graphene, which can be attributed to the complicated three-layer-sandwiched atomic structure of SLMoS2. The result suggests that the soft tip with a small spring constant can be an ideal candidate for the observation of stick–slip behaviors of the monovacancy-defective surface. This study can fill the gap in atomic-scale friction experiments and molecular dynamics simulations of 2D materials with vacancy-related defects.

show abstract

“…106 For MC SLG, edge wear is known to proceed via wrinkles formation and partial peeling of graphene from the deposition substrate. 106 Wear starts at sufficiently large values of the normal load FN (40 nN), 106 can be virtually probed on any surface and in combination with other co-deposited nanomaterials. This largely expands the number of systems and the phenomenology that might be investigated through AFM nanomanipulation experiments, in analogy with well-established approaches to nanoparticles friction.…”

Section: Spectroscopy Of Normal and Friction Forces On Printed Graphenementioning

confidence: 99%

Ultralow friction of ink-jet printed graphene flakes

et al. 2017

View full text Add to dashboard Cite

We report the frictional response of few-layer graphene (FLG) flakes obtained by the liquid phase exfoliation (LPE) of pristine graphite. To this end, we inkjet print FLG on bare and hexamethyldisilazane-terminated SiO substrates, producing micrometric patterns with nanoscopic roughness that are investigated by atomic force microscopy. Normal force spectroscopy and atomically-resolved morphologies indicate reduced surface contamination by solvents after a vacuum annealing process. Notably, the printed FLG flakes show ultralow friction comparable to that of micromechanically exfoliated graphene flakes. Lubricity is retained on flakes with a lateral size of a few tens of nanometres, and with a thickness as small as ∼2 nm, confirming the high crystalline quality and low defects density in the FLG basal plane. Surface exposed step edges exhibit the highest friction values, representing the preferential sites for the origin of the secondary dissipative processes related to edge straining, wear or lateral displacement of the flakes. Our work demonstrates that LPE enables fundamental studies on graphene friction to the single-flake level. The capability to deliver ultralow-friction-graphene over technologically relevant substrates, using a scalable production route and a high-throughput, large-area printing technique, may also open up new opportunities in the lubrication of micro- and nano-electromechanical systems.

show abstract

Wear properties of graphene edges probed by atomic force microscopy based lateral manipulation

Cited by 48 publications

References 66 publications

Friction and Adhesion of Different Structural Defects of Graphene

Friction and Adhesion of Different Structural Defects of Graphene

Atomic-Scale Friction on Monovacancy-Defective Graphene and Single-Layer Molybdenum-Disulfide by Numerical Analysis

Ultralow friction of ink-jet printed graphene flakes

Contact Info

Product

Resources

About