Article
Engineering, Mechanical
Romain Lhermerout
Summary: The study performed Y Surface Force Balance (SFB) experiments in a dry atmosphere and across an ionic liquid, revealing that mechanical deformations of surfaces have significant impacts on force measurements. It was found that the contact radius on the ionic liquid can be described by the DMT model, contrary to the conventional belief that SFB experiments are always in the JKR regime. Additionally, the study observed that mica can experience compression in addition to bending, and proposed a modified procedure for calibrating mica thickness in a dry atmosphere. The structural forces measured across the ionic liquid were not described by the usual exponentially decaying harmonic oscillation, suggesting a convolution of surface forces and mechanical response of the solids.
Article
Thermodynamics
Riccardo Friso, Alessio Suman, Alessandro Vulpio, Nicola Zanini, Nicola Casari, Michele Pinelli
Summary: Solid contaminants dispersed in the air can significantly impact the performance of engineering apparatuses. This study provides a mechanistic model for predicting deposit layer removal from substrates exposed to fluid flows, which can help mitigate performance losses caused by the modification of contaminated surfaces.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Multidisciplinary
M. Kamran, N. M. Nouri
Summary: Improving the performance of surface-piercing propellers requires the design and construction of a model test mechanism. This study focused on designing and calibrating a test setup capable of testing propellers. A four-component dynamometer was designed to measure the propeller's torque and forces. The calibration coefficients were obtained using ANOVA methods and the performance test results were presented for the HL001 propeller.
Article
Instruments & Instrumentation
Yohan Barbarin, Gael Le Blanc, Marie Roudot, Jerome Luc
Summary: This study demonstrates the advantages of our 16-wavelength photonic Doppler velocimetry system over conventional systems in shock physics experiments. The system's reliability and accuracy are validated through a dedicated crosstalk comparative experiment and discussions on velocity uncertainties.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Multidisciplinary
Xin Yu, Yunyun Sun, Shijing Wu
Summary: A novel multi-stage contact model of fractal rough surfaces is proposed in this paper. The contact behavior of the whole surface is distinguished into five stages based on the deformation modes of multi-scale asperities. The relationship between contact force, normal stiffness, and real contact area under the effects of fractal factors is analyzed, and the developed model is compared with other models and experimental data.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Chemistry, Multidisciplinary
Xiao Xiao, Shukun Li, Xiandong Zhu, Chunhui Zhang, Fengmin Jiang, Cunming Yu, Lei Jiang
Summary: The study successfully prepared a two-dimensional superaerophilic surface inspired by Nepenthes pitcher, achieving unidirectional and long-distance gas bubble delivery. The kinetic process regulated by the anisotropic motion resistance arising from the patterns was demonstrated through in situ experiments and finite element modeling. The design was proven to be a potential solution for facile manipulation of gas bubbles and offered a simple, adaptive, and reliable strategy for long-range gas transport underwater.
Article
Biochemistry & Molecular Biology
Koichiro Ishida, Tetsuo Kondo
Summary: In this study, we estimated the surface free energy values of CNFs thin films using traditional contact angle methods. The accuracy of these values was verified by matching the obtained adhesion energy values with the actual interfacial adsorption behaviors of CNFs. Therefore, these evaluated surface energy values can be a useful tool for designing interfacial interactions between CNF surfaces and other materials.
Article
Chemistry, Physical
Pejman Ganjeh-Anzabi, Heidi Jahandideh, Stephanie A. Kedzior, Milana Trifkovic
Summary: A reliable method for determining the surface free energy (SFE) of nanoparticles has been developed in this study. The method takes into account the effect of surface roughness on the measurements and has been verified experimentally. The SFE of various materials has been successfully determined using this method.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Chemistry, Analytical
Celeste R. Rousseau, Philippe Buhlmann
Summary: Research in recent years has focused on the development of solid-contact ISEs for calibration-free measurements in long-term, in situ analysis. This review discusses the definition of calibration-free usage and relevant literature, with a focus on different mechanisms of ion-to-electron signal transduction and different types of transduction modes.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Chemical
Shuwen Wang, Jiahui Chen, Zhiguo Liu, Michael Morgan, Xiaoxiao Liu
Summary: The measurement accuracy of vibratory surface finishing forces is affected by the wiring of the force sensor. A triaxial wireless force sensor is developed to solve this problem and measure the forces between media and workpiece surfaces in vibratory surface finishing. Experimental results show that normal impacts between the media and workpiece are dominant, and the mean forces on the front surface of the workpiece are larger than on the side and rear surfaces. The mass and shape of media significantly affect the forces, which in turn affect the surface roughness and hardness of the workpiece.
Article
Automation & Control Systems
Zhenguo Zhang, Yanjie Chen, Yangning Wu, Bingwei He, Zhiqiang Miao, Hui Zhang, Yaonan Wang
Summary: This paper investigates the control stability of unmanned aerial manipulator (UAM) during the switching operations in different environments and the high-precision contact force requirements. A hybrid force/position control strategy is proposed, utilizing adaptive sliding mode control and adaptive impedance force control methods for free flight and contact operation phases respectively. A robust adaptive control strategy is also proposed for attitude loop compensation. The stability of the switching system is analyzed using the continuous Lyapunov function, and the effectiveness of the proposed schemes is verified through simulations and experiments.
IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Mechanical
D. Butler, S. M. Smith, P. A. Brandner, D. B. Clarke, B. W. Pearce
Summary: The paper introduces a novel design of a six-component force balance used in the cavitation tunnel of the University of Tasmania, which exhibits high sensitivity and stiffness. It presents a critical analysis of the balance's dynamic properties, as well as calibration methodologies and measurement uncertainties. A dynamic vibration model was built to predict the force balance's natural frequencies, providing confidence in the data produced and guiding future experimental investigations.
EXPERIMENTAL TECHNIQUES
(2021)
Article
Construction & Building Technology
Mei Lin, Jun Shuai, Ping Li, Xiao Kang, Yu Lei
Summary: This study discusses the rheological properties and microscopic mechanism of reclaimed asphalt pavement (RAP) by using laboratory simulation and actual aging methods. The effects of different conditions on rheological parameters were analyzed through Dynamic Shear Rheometer (DSR) tests, and the relationship between viscosity, rheological parameters, and intermolecular forces of reclaimed asphalt was clarified through microstructure tests. The study establishes the relationship among chemical components, microstructure, and rheological properties of reclaimed asphalt, revealing the microscopic mechanism and providing important evaluation methods and theoretical basis for the effective utilization of aging asphalt.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Yasuhiro Shimada, Motohiro Tsubota, Shuji Matsusaka
Summary: A centrifugal method was used to analyze particle-surface interactions, and a rigid-body model was employed to determine adhesion force and contact radius based on particle diameter, angular velocities, and surface roughness.
Article
Engineering, Mechanical
Yanfei Fang, Liran Ma
Summary: Based on a mechanical model, this study investigates the surface force distribution, boundary lubricated film thickness, and surface pressure distribution in water-based boundary lubricated contacts. The results show the influence of hydration on surface force interaction and provide important design guidance for achieving liquid superlubricity in water-based boundary lubrication.
Article
Chemistry, Physical
Romain Lhermerout, Christophe Diederichs, Sapna Sinha, Kyriakos Porfyrakis, Susan Perkin
JOURNAL OF PHYSICAL CHEMISTRY B
(2019)
Article
Chemistry, Multidisciplinary
Carla S. Perez-Martinez, Susan Perkin
Article
Multidisciplinary Sciences
Alexander M. Smith, James E. Hallett, Susan Perkin
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
Article
Chemistry, Physical
Timothy S. Groves, Carla S. Perez-Martinez, Romain Lhermerout, Susan Perkin
Summary: Water-in-salt electrolytes are a novel class of aqueous solutions with wide electrochemical stability windows, but the high ion concentration makes them less understood compared to more dilute electrolyte solutions. Research has shown that these electrolytes form a layered structure at charged interfaces, composed of a hydrated cation nanostructure and nonaqueous anion-rich domains, which will impact their capacitance and double-layer behavior for energy storage applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Condensed Matter
Carla S. Perez-Martinez, Timothy S. Groves, Susan Perkin
Summary: This study demonstrates reversible and switchable actuation of two surfaces using AC electric fields, measuring adhesive forces and surface separation with sub-molecular resolution. The oscillatory structural force between surfaces across the fluid, unaffected by the AC field, allows for precise control of adhesive states through field tuning. Exquisite control of surface interactions using an external field is shown in this proof-of-concept.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Eleanor Milnes-Smith, Corinne A. Stone, Colin R. Willis, Susan Perkin
Summary: This study investigates the liquid- and temperature-dependency of surface reconstruction of plasma polymerized perfluoroalkyl acrylates using contact angle aging. The results show that the contact angles of both polar and nonpolar liquids exhibit time dependency above the bulk melting point of the polymers. It is also found that surface reconstruction can be driven by the preferential segregation and polar interactions.
Review
Chemistry, Physical
Fernando Bresme, Alexei A. Kornyshev, Susan Perkin, Michael Urbakh
Summary: This Review discusses the development of electronanotribology and its collaboration with room-temperature ionic liquids to control friction at the nanoscale. It highlights the potential of electrically controlling friction and the challenges that need to be addressed for future applications.
Article
Multidisciplinary Sciences
James E. Hallett, Kieran J. Agg, Susan Perkin
Summary: Cellular organisms regulate electrolyte composition in the cytosol to optimize intracellular molecular interactions and balance external osmotic pressure. This study investigates the combined effect of ionic and zwitterionic solutes on interaction forces across electrolytes and finds that zwitterions have a clear role in modifying interactions compared to simple salt solutions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Hannah J. Hayler, Susan Perkin
Summary: The mixture of ethylene glycol (EG) and choline chloride (ChCl) is a typical deep eutectic solvent (DES), and its phase behavior and phase diagram differ significantly from the previous expectations. The eutectic point of this mixture lies between -28±1 degrees C and 0.01<x(ChCl)<0.02, and the eutectic temperature is not as "deep" as predicted by the ideal solution theory. Additionally, we observe a cold-crystallisation at T = -65 degrees C, which may have been mistakenly interpreted as the eutectic point.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
James E. Hallett, Hannah J. Hayler, Susan Perkin
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Eleanor P. Milnes-Smith, Corinne A. Stone, Susan Perkin
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Romain Lhermerout, Susan Perkin
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Physical
Weichao Zheng, Carla Sofia Perez-Martinez, Gia Petriashvili, Susan Perkin, Bruno Zappone
Article
Chemistry, Physical
Carla Sofia Perez-Martinez, Susan Perkin
Review
Engineering, Mechanical
Romain Lhermerout, Christophe Diederichs, Susan Perkin