Article
Physics, Fluids & Plasmas
P. C. Torche, P. Nicolini, T. Polcar, O. Hovorka
Summary: This paper highlights the importance of developing the thermodynamics of nanoscale friction and demonstrates how modern stochastic thermodynamics can help interpret measurements obtained by friction force microscopy. It shows that heat produced during the friction process serves as an unambiguous measure of thermodynamic irreversibility, with velocity-dependent scaling behavior observed in a broad velocity range.
Article
Materials Science, Ceramics
Hamideh Shakeripour, Seyed Sajjad Hosseini, Seyedeh Sara Ghotb, Behnaz Hadi-Sichani, Sepideh Pourasad
Summary: The study introduced Fe, Co and Ni magnetic impurities into superconducting cuprate YBa2Cu3O7-delta, resulting in an increase in Tc, while non-magnetic dopings showed a decrease in Tc.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Wen Wang, Haocheng Lei, Ashu Wang
Summary: In this study, the friction behavior of Bi2Se3 was investigated using conductive friction force microscopy under ultra-high vacuum conditions. The experimental results revealed a non-monotonic enhancement of friction, with the emergence of two friction peaks. Further investigations demonstrated that this anomalous friction behavior originated from the formation and rupture of multiple thermally activated sub-contacts.
Article
Chemistry, Physical
Pan Li, Sven H. C. Askes, Esther del Pino Rosendo, Freek Ariese, Charusheela Ramanan, Elizabeth von Hauff, Andrea Baldi
Summary: In this work, temperature measurements at the nanoscale were achieved by exploiting the combination of surface-enhanced Raman spectroscopy and the temperature dependence of Raman peaks in beta-CuPc. The temperature of plasmonic gold nanoparticles under laser irradiation was determined by measuring the temperature-dependent Raman shifts of beta-CuPc films coated on an array of Au nanodisks and using calibration curves. The extracted temperatures were confirmed to be consistent with numerical modeling results.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Deliang Zhang, Zibo Li, Lasse Hyldgaard Klausen, Qiang Li, Mingdong Dong
Summary: This article summarizes the friction behaviors and underlying physical mechanisms of 2D materials, with an increased understanding of their friction properties thanks to the development of atomic and friction force microscopy. The effects of atomic structures and external factors on friction, as well as strategies for friction modulation, are discussed. The challenges in practical applications of 2D materials as atomically thin lubricants and the prospects for future progression are also provided.
MATERIALS TODAY PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Miranda L. Vinay, Jay C. LeFebvre, Han Cai, Joseph Forman, Shane Cybart
Summary: The study found that bromination of YBCO results in changes in surface morphology and composition, but has minimal impact on electrical properties, only causing slight electrical adjustments.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Miranda L. Vinay, Jay C. LeFebvre, Han Cai, Joseph Forman, Shane Cybart
Summary: Research showed that using a 1% bromine-ethanol etchant solution to etch YBCO thin films resulted in changes in electrical properties, but the impact was minimal.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Erik Weiand, James P. Ewen, Yuri Roiter, Peter H. Koenig, Steven H. Page, Francisco Rodriguez-Ropero, Stefano Angioletti-Uberti, Daniele Dini
Summary: We studied the nanoscale friction of biomimetic hair surfaces using chemical colloidal probe atomic force microscopy experiments and nonequilibrium molecular dynamics simulations. The experiments involved measuring friction between water-lubricated silica surfaces functionalised with monolayers of octadecyl or sulfonate groups, which represent the surfaces of virgin and bleached hair, respectively. The simulations examined friction between coarse-grained model hair surfaces with varying degrees of chemical damage, where octadecyl groups were replaced with sulfonate groups. Our results indicate that modified surface chemistry, rather than roughness changes or subsurface damage, controls the increase in nanoscale friction of bleached or chemically damaged hair. These findings have implications for screening the tribological performance of hair care formulations.
Letter
Chemistry, Physical
Abbie Lear, J. L. Ross Anderson, Donald Hilvert, Vickery L. Arcus, Marc W. van der Kamp, H. Adrian Bunzel, Adrian J. Mulholland
Summary: Activation heat capacity is an important factor in enzyme evolution and thermoadaptation. We found that the emergence of curved activity-temperature profiles in a designer enzyme was due to the selective rigidification of its transition state ensemble that induced an activation heat capacity. However, simulations by angstrom qvist challenged our findings, suggesting that the experimental observations were caused by a change in the rate-limiting step.
Article
Engineering, Mechanical
Pan Wang, He Liang, Liang Jiang, Linmao Qian
Summary: Surface roughness has a significant impact on friction and wear, especially at the nanoscale. This study investigates the effect of nanoscale surface roughness on sliding friction and wear. The research reveals that reducing surface roughness decreases friction and wear in mixed lubrication, but excessively low roughness can lead to friction failure. The findings enhance our understanding of the role of surface roughness in tribology.
Article
Engineering, Mechanical
Lilong Pang, Pengfei Tai, Tielong Shen, Zhiguang Wang, Shengyu Zhu, Minghuan Cui, Hailong Chang, Hongpeng Zhang, Zhiwei Ma, Zongxin Mu, Cunfeng Yao
Summary: The study investigated the collective friction and wear of tungsten alloy balls at 250 degrees C using self-developed equipment. The results showed that the mass loss ratio of the balls experienced different stages, with a maximum of about 0.32 wt%, leading to the formation of a new layer on the ball surface. The unique wear characteristics of the balls at each stage were also observed.
TRIBOLOGY INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Sebastian Ehrling, Hiroki Miura, Irena Senkovska, Stefan Kaskel
Summary: Metal-organic frameworks (MOFs) have shown great potentials in energy storage, separation, sensing, and catalysis, and integrating such materials into thin films and biological applications through nanostructuring is crucial. However, downsizing below critical dimensions can lead to dramatic changes in MOF's dynamic behavior and responsiveness towards external stimuli.
TRENDS IN CHEMISTRY
(2021)
Article
Physics, Applied
Ariel Roitman, A. Shaulov, Y. Yeshurun
Summary: An improved YBa2Cu3O7-delta-based microwave kinetic inductance detector with a quality factor Qi > 2.5x104 is demonstrated.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Evangelos Liamas, Simon D. Connell, Morfo Zembyla, Rammile Ettelaie, Anwesha Sarkar
Summary: This study showed that the modulus of a surface can significantly affect the frictional properties of protein-coated surfaces, with higher deformability leading to lower contact pressure and decreased friction.
Article
Nanoscience & Nanotechnology
F. C. Liu, P. Dong
Summary: This study successfully controlled the development of intermetallic compounds at the Al-Fe interface through FSW experiments, reducing the thickness layer to a nanoscale amorphous phase and providing new insights and methods for joining aluminum alloy and steel without detrimental IMCs.
SCRIPTA MATERIALIA
(2021)
Article
Physics, Applied
Arash Khajeh, Jacqueline Krim, Ashlie Martini
APPLIED PHYSICS LETTERS
(2019)
Correction
Physics, Applied
Arash Khajeh, Jacqueline Krim, Ashlie Martini
APPLIED PHYSICS LETTERS
(2019)
Article
Materials Science, Multidisciplinary
Abram H. Clark, Robert P. Behringer, Jacqueline Krim
Article
Chemistry, Physical
Vladislav Perelygin, Maxim A. Voinov, Antonin Marek, Erkang Ou, Jacqueline Krim, Donald Brenner, Tatyana Smirnova, Alex Smirnov
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Multidisciplinary Sciences
B. Acharya, C. M. Seed, D. W. Brenner, A. I. Smirnov, J. Krim
SCIENTIFIC REPORTS
(2019)
Article
Engineering, Electrical & Electronic
Caitlin M. Seed, Biplav Acharya, Rachel Andrus, Jacqueline Krim
SENSORS AND ACTUATORS A-PHYSICAL
(2020)
Article
Chemistry, Multidisciplinary
Liangliang Su, Jacqueline Krim, Donald W. Brenner
Article
Engineering, Chemical
C. M. Seed, B. Acharya, J. Krim
Summary: The use of QCM technology to tune friction at liquid-solid interfaces with tribotronic methods employing externally applied electric fields has been investigated. The results show that friction can be modulated in both nanoparticle suspensions and ionic liquid systems, highlighting the versatility and simplicity of QCM measurements in detecting and tuning friction.
Article
Chemistry, Physical
C. M. Seed, B. Acharya, V Perelygin, A. Smirnov, J. Krim
Summary: The study investigated the nanotribological and electrochemical behavior of platinum-nanofluid interfaces in aqueous suspensions of charged Al2O3 and TiO2 nanoparticles using Quartz Crystal Microbalance and cyclic voltammetry techniques. It was found that adjusting the positions of nanoparticles relative to Pt surface electrodes had a significant impact on both voltammetry and tribological performance measures. Higher interfacial friction levels were observed for both types of nanoparticles when electrostatically driven towards the surface.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
C. M. Seed, B. Acharya, N. Nunn, A. I. Smirnov, J. Krim
Summary: Nanoparticles as additives in lubricating fluids have great potential, but the size-dependent tribotronic response needs further investigation. This study characterized the nanotribological and electrochemical behavior of TiO2 nanoparticles of different sizes and their effect on interfacial friction.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Biplav Acharya, Caitlin M. Seed, Jacqueline Krim
Summary: This study investigates the effect of shear stress and nanodiamond additives on the formation temperatures of thermal- and tribo-reaction films on steel samples immersed in basestock oils containing zinc dialkyl dithiophosphate (ZDDP) additives. In-situ measurements using a quartz crystal microbalance (QCM) were conducted over a temperature range of 25-200 degrees C in oil, oil plus ZDDP, and oil plus ZDDP-ND blends. The results show that the formation temperatures of ZDDP reaction films decrease with contact stress and are similar to those of ZDDP-ND blends. Nanodiamonds were found to be embedded in the reaction films, consistent with previous observations for Tricresyl phosphate (TCP) and ND blends, indicating the presence of both primary and secondary reaction products in the films. Furthermore, the ZDDP+ND reaction tribofilms were observed to be thicker, rougher, and more adhesive compared to those formed with only ZDDP.
APPLIED SURFACE SCIENCE ADVANCES
(2022)
Article
Engineering, Mechanical
Caitlin M. Seed, Biplav Acharya, Jacqueline Krim
FRONTIERS IN MECHANICAL ENGINEERING-SWITZERLAND
(2020)
Article
Engineering, Mechanical
Biplav Acharya, Tyler N. Pardue, Liangliang Su, Alex I. Smirnov, Donald W. Brenner, Jacqueline Krim
Article
Physics, Condensed Matter
Z. B. Fredricks, K. M. Stevens, S. G. Kenny, B. Acharya, J. Krim
Article
Engineering, Mechanical
Biplav Acharya, Keshav S. Avva, Binita Thapa, Tyler N. Pardue, Jacqueline Krim
