Results 11 to 20 of about 581 (170)

2D Nanomaterials Toward Function-Ready Superlubricity in Advanced Microsystems. [PDF]

Adv Mater
A unified framework links structural and transformation superlubricity with microsystem functions and deployment requirements. Mechanisms, device architectures, integration strategies, AI‐guided discovery, and benchmarking protocols are connected to define function‐ready superlubricity in advanced microsystems.
Geng Y, Yang J, Yang Y.
europepmc   +2 more sources

Shear-Induced Emergence of Aromatic Superlow-Friction Interfaces in Amorphous Carbon: Triggering Chemical Impurities and Atomic-Scale Mechanisms. [PDF]

Adv Sci (Weinh)
High‐throughput quantum‐mechanical simulations reveal that amorphous carbon undergoes shear‐driven structural transformation into aromatic, graphene‐like interfaces. This mechanochemical process is governed by dopant chemistry: dopants with valency less than four promote the emergence of superlow‐friction amorphous graphene, whereas tetra‐valent ...
Kuwahara T, Horiguchi K, Mayrhofer L, Moras G, Moseler M.   +4 more
europepmc   +2 more sources

Origins of Graphite Resistivity: Decoupling Stacking Fault and Rotational Misorientation. [PDF]

Adv Sci (Weinh)
Interfacial dislocations critically influence interlayer transport in van der Waals (vdW) materials, yet quantifying their individual contributions remains challenging. We measure graphite's c‐axis resistivity and develop a decoupling strategy, revealing a resistivity ratio of ∼4507:74:1 for rotational misorientations, stacking faults, and AB stacking,
Chen W, Yang F, Wu T, Wang Y, Zheng Q, Peng D, Wu Z.   +6 more
europepmc   +2 more sources

Unravelling friction anisotropy by atomic force microscopy. [PDF]

J Microsc
Abstract Friction plays a crucial role in both natural phenomena, from the flow of blood cells to earthquakes, and technological applications, from car engines to wind turbines. One of the most fundamental aspects of tribology is friction anisotropy, that is, the dependence of the friction force vector on the direction of sliding.
Cafolla C, Campione M.
europepmc   +2 more sources

Superlubric Polycrystalline Graphene Interfaces [PDF]

Nature Communications, 2021
Abstract The effect of corrugated grain boundaries on the frictional properties of extended graphitic contacts incorporating a polycrystalline surface are investigated. The friction is found to be dominated by shear induced buckling and unbuckling of corrugated grain boundary dislocations, leading to a nonmonotonic behavior of friction with ...
Xiang Gao, Wengen Ouyang, Michael Urbakh, Oded Hod   +3 more
openaire   +4 more sources

Superlubric Graphullerene. [PDF]

Nano Lett
Graphullerene (GF), an extended quasi-two-dimensional network of C60 molecules, is proposed as a multicontact platform for constructing superlubric interfaces with layered materials. Such interfaces are predicted to present very small and comparable sliding energy corrugation regardless of the identity of the underlying flat layered material surface ...
Ying P, Hod O, Urbakh M.
europepmc   +3 more sources

Superlubricity of Graphite

Physical Review Letters, 2004
Using a home-built frictional force microscope that is able to detect forces in three dimensions with a lateral force resolution down to 15 pN, we have studied the energy dissipation between a tungsten tip sliding over a graphite surface in dry contact.
Dienwiebel, M., Verhoeven, G. S., Pradeep, N., Frenken, J. W. M., Heimberg, J. A., Zandbergen, H. W.   +5 more
openaire   +5 more sources

Superlubricitive engineering—Future industry nearly getting rid of wear and frictional energy consumption

Friction, 2020
Superlubricity has been developing very rapidly in recent years as a new and important area in tribology. Many new phenomena and materials, as well as some new mechanisms in both liquid and solid superlubricity have been obtained.
Jianbin Luo, Xiang Zhou
doaj   +1 more source

Predicting the lifetime of superlubricity [PDF]

EPL (Europhysics Letters), 2015
The concept of superlubricity has recently called upon notable interest after the demonstration of ultralow friction between atomistically smooth surfaces in layered materials. However, the energy dissipation process conditioning the sustainability of superlubric state has not yet been well understood.
Wang, A.L., He, Q.-C., Xu, Z.P.
openaire   +3 more sources

Macroscale Superlubricity Achieved With Various Liquid Molecules: A Review

Frontiers in Mechanical Engineering, 2019
Superlubricity is generally classified as solid superlubricity and liquid superlubricity according to the lubricants involved at the interfaces, and is a popular research topic in tribology, which is closely linked to energy dissipation.
Xiangyu Ge, Jinjin Li, Jianbin Luo
doaj   +1 more source