Results 11 to 20 of about 198 (130)

Macroscale Superlubricity with a High Load‐Carrying Capacity Enabled by Nitrogen‐Doped Graphene Quantum Dots in Lubricated Silicon‐Doped Amorphous Carbon Films

Small Structures
Achieving macroscale superlubricity with engineering materials is highly desirable for energy conservation, environmental benefits, and longevity of mechanical components. However, attaining superlubricity in aqueous‐lubricated systems with enhanced load‐
Irfan Nadeem, Matjaž Finšgar, Goran Dražić, Bojan Ambrožič, Matjaž Malok, Albano Cavaleiro, Mitjan Kalin   +6 more
doaj   +3 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

Macroscale, humidity-insensitive, and stable structural superlubricity achieved with hydrogen-free graphene nanoflakes [PDF]

Nature Communications
Achieving solid superlubricity in high-humidity environments is of great practical importance yet remains challenging nowadays, due to the complex physicochemical roles of water and concomitant oxidation on solid surfaces.
Ruiyun Li, Xing Yang, Jiacheng Li, Yongfu Wang, Ming Ma   +4 more
doaj   +2 more sources

Microscale Contact Electrification with Unprecedented High Intrinsic Charge Density. [PDF]

Small
With the atomically flat contact interface by a microscale graphite slider and polytetrafluoroethylene, microscale contact electrification with high contact efficiency is achieved. The developed microscale triboelectric nanogenerator exhibits a record‐high intrinsic triboelectric charge density of 2.6 mC m−2, which is attributed to the greatly enhanced
Chen C, Nie J, An J, Xia X, Wu Z, Wang H, Cui H, Zheng Q, Zi Y.   +8 more
europepmc   +2 more sources

Electrically Tunable Friction: From Sticky to Slippery with Ionic Hydrogels. [PDF]

Adv Mater
This work demonstrates electrically tunable friction “from sticky to slippery” using ionic hydrogels, achieving reversible more‐than‐fifty‐fold modulation without liquid lubricants. An electric field extracts a salt‐rich interfacial layer that dramatically reduces friction.
Liu C, Yao Y, Wang Y, Zhou Q, Zhao Z, Qiao C, Sun Y, Meng Y, Tian Y, Zeng H.   +9 more
europepmc   +2 more sources

Unraveling the Interfacial Properties of Twisted Single-Crystal Au(111)/MoS₂ Heterostructures: A Pathway to Robust Superlubricity. [PDF]

Adv Sci (Weinh)
Interfacial mechanical properties of MoS2/Au(111) heterostructures are revealed by advanced experimental and computational methods. The developed semi‐anisotropic interlayer potential (SAIP) accurately predicts moiré‐driven out‐of‐plane corrugation, aligning with experimental observations.
Yao Y, Song Y, Wu B, Scherb S, Huang S, Hinaut A, Glatzel T, Meyer E, Liu Z, Ouyang W.   +9 more
europepmc   +2 more sources

A Theoretical Study on Friction of Macroscale Patterned Surfaces: Implications for Scaling Up Superlubricity. [PDF]

ACS Appl Mater Interfaces
"Structural superlubricity", a state of frictionless sliding between crystalline surfaces, has been observed at the nanoscale and microscale. However, achieving it at the macroscale requires further investigation. Inspired by recent experimental studies, we theoretically examine the friction behavior of macroscale patterned surfaces composed of ...
Ho VH, Gianetti MM, Uluca A, Sinnott AD, Haugen B, Cross GLW, de Wijn AS.   +6 more
europepmc   +4 more sources

The Promise of Solid Lubricants for a Sustainable Future. [PDF]

Adv Mater
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Grützmacher PG, Voevodin AA, Korényi-Both A, Righi MC, DellaCorte C, Bagcivan N, Erdemir A, Gachot C.   +7 more
europepmc   +2 more sources

Macroscale superlubricity enabled by rationally designed MoS2-based superlattice films

Cell Reports Physical Science, 2023
Siming Ren, Jibin Pu, Qunyang Li
exaly   +2 more sources

Macroscale Superlubricity and Polymorphism of Long-Chain n-Alcohols [PDF]

ACS Applied Materials & Interfaces, 2020
Simple n -alcohols, such as 1-dodecanol, show anomalous film-forming and friction behaviour under elastohydrodynamic lubrication (EHL) conditions, as found inside bearings and gears. Using tribometer, diamond anvil cell (DAC), and differential scanning calorimetry (DSC) experiments, we show ...
Tom Reddyhoff, James P. Ewen, Pushkar Deshpande, Mark D. Frogley, Mark D. Welch, Wren Montgomery   +5 more
openaire   +4 more sources