In this Perspective, we present the recent advancement and the prospects of atomic-scale friction and adhesion measurements across the between ultrahigh vacuum and ambient pressure environments using variable-pressure atomic force microscopy (VP-AFM). We introduce the VP-AFM that enables nanotribological studies under various gas conditions with partial pressure ranging from UHV (1.0 × 10 mbar) to 1 bar. We highlight the frictional behaviors of ultrananocrystalline diamond surface in oxygen and water gas environments, as well as the chemical states probed with near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS). The atomic scale degradation processes of MA(CHNH)PbBr, which is an organic-inorganic hybrid perovskite (OHP) investigated with VP-AFM are introduced. Finally, we discuss the potential works on catalytic model systems including bimetallic PtNi(111) and TiO(110) and the future perspective of nanotribology under ambient conditions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.4c01146 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The effects of disordered edge and vanishing friction in microscale structural superlubric graphite contact.
Nat Commun
December 2024
Department of Mechanical Engineering, Tsinghua University, Beijing, China.
Article Synopsis
- Structural superlubricity (SSL) is a state of extremely low friction and wear between solid surfaces, providing a potential solution for reducing these factors in practical applications.
- Recent research identifies that edge pinning significantly influences SSL friction, although understanding of its atomic-level nature was previously unclear.
- The study reveals the atomic structure of disordered edges in microscale graphite and demonstrates that by using SiN caps to disconnect edges from the substrate, an ultra-low friction stress of 0.1 kPa or lower can be achieved.
Nonmonotonic Velocity Dependence of Atomic Friction Induced by Multiple Slips.
Phys Rev Lett
September 2024
Department of Physics, University of Basel, 4056 Basel, Switzerland.
The transition from single to multiple atomic slips, theoretically expected and important in atomic-scale friction, has never been demonstrated experimentally as a function of velocity. Here we show by high-resolution friction force microscopy on monolayer MoS_{2}/Au(111) that multiple slips leave a unique footprint-a frictional velocity weakening. Specifically, in a wide velocity interval from 10 to 100 nm/s, friction surprisingly decreases.
View Article and Find Full Text PDFAtomic-Scale Friction and Adhesion at Ambient Pressure.
Langmuir
October 2024
Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
In this Perspective, we present the recent advancement and the prospects of atomic-scale friction and adhesion measurements across the between ultrahigh vacuum and ambient pressure environments using variable-pressure atomic force microscopy (VP-AFM). We introduce the VP-AFM that enables nanotribological studies under various gas conditions with partial pressure ranging from UHV (1.0 × 10 mbar) to 1 bar.
View Article and Find Full Text PDFTriple Effects of the Physicochemical Interaction between Water and Copper and Their Influence on Microcutting.
ACS Appl Mater Interfaces
July 2024
Department of Mechanical Engineering, College of Design and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore.
Water has been recognized in promoting material removal, traditionally ascribed to friction reduction and thermal dissipation. However, the physicochemical interactions between water and the workpiece have often been overlooked. This work sheds light on how the physicochemical interactions that occur between water (HO) and copper (Cu) workpiece influence material deformations during the cutting process.
View Article and Find Full Text PDFAnisotropy Dependence of Material Deformation Mechanisms in Nanoscratching Monocrystalline BaF: Experiments and Atomic Simulations.
ACS Appl Mater Interfaces
July 2024
Faculty of Mechanical and Electrical Engineering, Kunnming University of Science and Technology, 650500 Kunming, China.
Monocrystalline barium fluoride (BaF), known for its exceptional optical properties in the infrared spectrum, exhibits anisotropy that influences surface quality and material removal efficiency during ultraprecision machining. This research explores the impact of anisotropy on the deformation and removal mechanisms of monocrystalline BaF by integrating nanoscratch tests with molecular dynamics (MD) simulations. Nanoscratch tests conducted on variously oriented monocrystalline BaF surfaces using a ramp loading mode facilitated the identification of surface cracks and a systematic description of material removal behaviors.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!