Article
Chemistry, Physical
Matthew D. Butler, Dominic Vella
Summary: The splitting of bridges significantly enhances adhesion force between rough surfaces, with the enhancement increasing with surface roughness; maximizing the number of bridges can increase total adhesion force by an order of magnitude. Shear resistance increases linearly with translation velocity and the behavior of many shearing bridges is quantified.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Toby Hamilton, Yongjun Peng
Summary: This study explores alternative methods for separating radionuclides from copper resources, finding that stirred regrinding is more effective in removing lead from chalcopyrite surfaces compared to tumbling regrinding. Stirred regrinding also concentrates lead in fine particles, offering a novel approach for removing radioactive contaminants with minimal chalcopyrite loss.
Article
Physics, Fluids & Plasmas
A. Kondi, V. Constantoudis, P. Sarkiris, K. Ellinas, E. Gogolides
Summary: In this work, the complexity of microscopy images of rough surfaces is characterized using the basic ingredients of chaotic dynamics. An image is used as the initial condition of a chaotic discrete dynamical system, and its transformations during the first iterations of the map are tracked. The stretching and folding of image texture caused by the map are exploited to quantify the complexity of the image texture. The method is validated in synthetic and real images, showing interesting results.
Article
Biochemical Research Methods
Yuan Su, Yang Xu, Tao Cui, Xiaojun Gao, Guoyi Xia, Yibo Li, Mengmeng Qiao, Yingbo Yu
Summary: The study introduces a quantitative assessment of maize kernel's mechanical crushing resistance through the HANDY tool, offering a new evaluation method. By analyzing the changes in mechanical properties of kernels and constructing a predictive model, the reliability and accuracy of threshing quality are enhanced. The identification of maize varieties suitable for mechanical harvesting is achieved through testing.
Article
Chemistry, Physical
Steffen B. Fischer, Erin Koos
Summary: This study demonstrates that capillary suspensions can be formed by mixing particles with partially saturated 1-alkanol/water solutions, without the need for temperature induced phase separation. Additionally, partially miscible oil suspensions can also form capillary bridges even during the drying process when exposed to high humidity.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Thermodynamics
Manohar Bongarala, Han Hu, Justin A. Weibel, Suresh Garimella
Summary: A figure of merit (FOM) has been developed to characterize the efficacy of evaporative heat transfer from microstructured surfaces, utilizing geometric quantities to provide flexibility in application to various surfaces. The FOM successfully captures the variation in evaporation heat transfer coefficient across different structures as well as the optimum dimensions for a given structure.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Construction & Building Technology
Alan Renato Estrada Caceres, Sergio H. P. Cavalaro, Renata Monte, Antonio Domingues de Figueiredo
Summary: The flexural beam test EN 14488-3 is a reference for characterizing the post-cracking tensile response of fibre-reinforced sprayed concrete (FRSC). The double punch test (DPT) and double-edge wedge splitting (DEWS) test offer alternative approaches for simplifying the assessment of post-cracking response of fibre-reinforced concrete. Results show high correlations between these tests and their ability to predict the constitutive model of FRSC.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Mechanics
Bauyrzhan K. Primkulov, Amir A. Pahlavan, Luis Cueto-Felgueroso, Ruben Juanes
Summary: We present a theoretical study of viscous slug motion inside a microscopically rough capillary tube, where pronounced stick-slip motion can emerge at slow displacement rates. By using an analogy with the motion of a pendulum inside a fluid-filled rotating drum, we show that the stick-slip motion transitions to steady sliding at high displacement rates. We characterize this crossover with a simple scaling relation and demonstrate the shift in dominant energy dissipation mechanisms within the system.
JOURNAL OF FLUID MECHANICS
(2023)
Review
Optics
Karin Schwibbert, Anja M. Richter, Joerg Krueger, Joern Bonse
Summary: Bacterial biofilms pose challenges in medical and industrial settings, with increasing resistance against biocides. Laser-texturing surfaces offers a promising bacteria-repellent strategy without the use of chemicals or antibiotics. This article reviews laser-surface subtractive texturing approaches and discusses challenges and future directions.
LASER & PHOTONICS REVIEWS
(2023)
Article
Agriculture, Multidisciplinary
Zilu Li, Xingyu Zhang, Yue Wang, Zirui Zheng, Chenhui Zhang, Tianyue Wu, Yanling Wu, Yuxia Gao, Fengpei Du
Summary: Glyphosate, a widely used herbicide, is crucial for weed control and crop production. However, changes in weed leaf surface characteristics may decrease glyphosate penetration and lead to evolved resistance. Therefore, it is important to establish a method for characterizing leaf surface and guide adjuvant selection to enhance glyphosate efficacy.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Cell Biology
Jack A. Bibby, Divyansh Agarwal, Tilo Freiwald, Natalia Kunz, Nicolas S. Merle, Erin E. West, Parul Singh, Andre Larochelle, Fariba Chinian, Somabha Mukherjee, Behdad Afzali, Claudia Kemper, Nancy R. Zhang
Summary: This study developed a statistical framework for single-cell pathway analysis, demonstrated its effectiveness compared to commonly used methods, and identified regulatory mechanisms and pathway activity in T cells.
Article
Engineering, Mechanical
Ebru Kalkan Okur, Fatih Yesevi Okur, Ahmet Can Altunisik, Murat Gunaydin, Suleyman Adanur
Summary: The design life of suspension bridges can be shortened due to factors such as strong winds, earthquakes, heavy vehicle loads, and corrosion and fatigue effects. This study focused on creating different damage scenarios for the Osmangazi Suspension Bridge in Turkey, and conducting progressive collapse analyses. The results showed that increasing the number of hanger breakages can lead to the collapse of the bridge.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Nutrition & Dietetics
Helen L. Barrett, Marloes Dekker Nitert, Michael D'Emden, Barbara Lingwood, Susan de Jersey, H. David McIntyre, Leonie K. Callaway
Summary: This study found differences in capillary triglyceride levels in late pregnant women, but no significant association with dietary fat intake response, suggesting that monitoring this indicator may not be very useful in the clinical management of gestational diabetes in pregnant women.
Article
Astronomy & Astrophysics
Robyn L. Munoz, Marco Bruni
Summary: Relativistic cosmology is formulated covariantly, but numerical relativity simulations require a gauge choice. In order to invariantly characterize spacetimes resulting from cosmological simulations, this study presents two methodologies to compute the electric and magnetic parts of the Weyl tensor. The developed codes show excellent agreement between analytic and numerical results, with the slicing code outperforming the geometric code in terms of convenience and accuracy. The slicing code, named EBWeyl, is made publicly available on github and applicable to any numerical spacetime in any gauge.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Chemistry, Multidisciplinary
Matthew T. Gole, Mohan T. Dronadula, Narayana R. Aluru, Catherine J. Murphy
Summary: Understanding the adsorption behavior of proteins on rough and wrinkled surfaces is crucial for biosensor and flexible biomedical device applications. This study investigates the nanoscale adsorption behavior of immunoglobulin M (IgM) and immunoglobulin G (IgG) on wrinkled and crumpled surfaces using atomic force microscopy (AFM). The results show that the presence of negative curvature on the wrinkled surface reduces protein surface coverage, mainly due to geometric hindrance and reduced binding energy, while smaller IgG molecules are not affected by this degree of curvature.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Sandrine Mariot, Marina Pasquet, Vincent Klein, Frederic Restagno, Emmanuelle Rio
Summary: This study introduces a new setup to generate and characterize giant soap films, measuring their maximum height and lifetime, as well as mapping the thickness of the film over time through a series of measurement methods.
EUROPEAN PHYSICAL JOURNAL E
(2021)
Article
Polymer Science
Marion Grzelka, Iurii Antoniuk, Eric Drockenmuller, Alexis Chenneviere, Liliane Leger, Frederic Restagno
Summary: The role of polymer volume fraction in steady-state slippage and interfacial friction was investigated, showing that slip lengths obey a power law dependence. The observed scaling of the friction coefficient k versus phi excludes a molecular mechanism of friction, and instead shows the dependence of solvent friction on phi. Two models based on friction of blobs or monomers on the solid surface describe the data well and highlight that Navier's interfacial friction is a semi-local phenomenon.
Article
Chemistry, Applied
Rohit Srivastava, Veronique Bosc, Frederic Restagno, Carole Tournier, Paul Menut, Isabelle Souchon, Vincent Mathieu
Summary: A biomimetic tribological set-up was developed to integrate physiological characteristics in oral friction studies, allowing for the measurement of how food properties, TMS properties and operational parameters affect friction coefficient values. The results showed that the presence of particles led to an increase in friction coefficient values, while food viscosity had a less significant impact. Additionally, increasing surface roughness and bulk rigidity of the TMSs markedly augmented the friction coefficient values.
FOOD HYDROCOLLOIDS
(2021)
Article
Food Science & Technology
Rohit Srivastava, Mathieu Mantelet, Anne Saint-Eve, Jean-Luc Gennisson, Frederic Restagno, Isabelle Souchon, Vincent Mathieu
Summary: This study presents a novel ultrasound method for exploring the mechanical deformability of artificial tongue models topped with agar and/or gelatin food gels during uniaxial compression. The results on ToF reflected the tie between the level of force and ATM deformation; they were also precise enough to identify gel fracture. R* was a crucial parameter influenced by both ATM properties and food gel properties.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Article
Physics, Fluids & Plasmas
Alexandre Vilquin, Vincent Bertin, Pierre Soulard, Gabriel Guyard, Elie Raphael, Frederic Restagno, Thomas Salez, Joshua D. McGraw
Summary: In this study, advection-diffusion coupling is found to greatly enhance particle and solute dispersion compared to pure diffusion, with the dynamics being sensitive to the initial spatial distribution of nanoparticles. The measurements conducted using evanescent wave microscopy reveal a family of master curves, showing the crucial role of initial concentration profiles. These findings are in quantitative agreement with existing analytical models and numerical simulations.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Chemistry, Physical
Q. Chen, F. Restagno, D. Langevin, A. Salonen
Summary: Research shows that in micellar solutions, the rise velocity of bubbles decreases with increasing bubble volume fraction in low NaSal concentration Newtonian solutions, following the Richardson-Zaki prediction. However, in shear thinning viscoelastic solutions, bubble clustering leads to faster rise velocities and a weaker dependence on the bubble volume fraction. The peculiar dependence of rise velocity on bubble volume fraction in shear thinning viscoelastic solutions can have important implications in flotation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Tiago Outerelo Corvo, Antoine Jourdain, Shona O'Brien, Frederic Restagno, Eric Drockenmuller, Alexis Chenneviere
Summary: This study investigates the influence of nanostructure of poly(ionic liquid)s on the macromolecular conformation of polymer chains using small-angle neutron scattering. The results show that the nanostructure of poly(ionic liquid)s leads to an increase in the radius of gyration of polymer chains in solution and a nonmonotonic evolution in bulk. Furthermore, evidence of interdigitation of alkyl side chains is observed.
Article
Nanoscience & Nanotechnology
Xavier Chevalier, Gwenaelle Pound-Lana, Cindy Gomes Correia, Sebastien Cavalaglio, Benjamin Cabannes-Boue, Frederic Restagno, Guillaume Miquelard-Garnier, Sebastien Roland, Christophe Navarro, Guillaume Fleury, Marc Zelsmann
Summary: In this study, the self-assembly of a lamellar block copolymer (BCP) was investigated under different wetting conditions. The chemical composition of under-layers and top-coats was found to influence the thin film stability, self-assembly kinetics, and BCP domain orientation. The dewetting of the BCP layer and the self-organization kinetics were explored using controlled wetting configurations.
Article
Physics, Multidisciplinary
Gabriel Guyard, Frederic Restagno, Joshua D. McGraw
Summary: Hydrodynamic flows in compliant channels have significant implications in physiology and microfluidics. This study investigates the relaxation dynamics of thin and soft rectangular microfluidic channels and provides a complete description of the experimental results. The findings contribute to the understanding of elastohydrodynamic coupling and the time-dependent behavior of compliant channel networks.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mechanics
Marie Corpart, Frederic Restagno, Francois Boulogne
Summary: The origin of the difference between the deposition of suspended particles in a sessile droplet and in an axisymmetric droplet deposited on a fiber is analyzed. The shape of the droplet on a fiber and its evaporative flux are modeled to derive analytical calculations. The hydrodynamics equations in the liquid phase are solved under the lubrication approximation to determine the flow velocity toward the contact lines. The substrate curvature plays a role in contact line depinning, local evaporative flux, and liquid flow field.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Physics, Fluids & Plasmas
Marina Pasquet, Frederic Restagno, Isabelle Cantat, Emmanuelle Rio
Summary: This article investigates the production, drainage, and stability of foam films, focusing on the regime of large velocities and large film sizes. The thickness profile of the film is found to follow an exponential pattern influenced by gravity and surface elasticity. A proposed model takes into account the interplay between gravity, film elasticity, and film extraction, and accurately predicts experimental data.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Physics, Fluids & Plasmas
Suzanne Lafon, Alexis Chenneviere, Frederic Restagno, Samy Merabia, Laurent Joly
Summary: The effect of temperature on friction and slip at the liquid-solid interface has been studied both numerically and experimentally over the past 20 years. However, the role of temperature on slip close to the glass transition has not been well explored. In this study, molecular dynamics simulations were used to investigate the effect of temperature on friction and slip length in a bidisperse atomic fluid. The results showed that at high temperatures, an Arrhenius law fits well, while in the supercooled state, the viscosity becomes super-Arrhenian and the interfacial friction can drastically decrease, leading to a significant increase in slip length.
Article
Chemistry, Physical
Marina Pasquet, Francois Boulogne, Julien Sant-Anna, Frederic Restagno, Emmanuelle Rio
Summary: In this paper, the thinning dynamics of evaporating surfactant-stabilised surface bubbles are investigated. The role of physical-chemistry of solutions used in a liquid bath is considered. It is found that the initial thickness is limited by surface elasticity and the drainage dynamics are independent of surfactant concentration. The physical-chemistry impacts the thinning dynamics through evaporation, and an increase in surfactant concentration decreases the impact of evaporation. The addition of glycerol increases the stability of the bubbles.
Article
Physics, Fluids & Plasmas
R. Ledesma-Alonso, E. Raphael, F. Restagno, C. Poulard
Summary: This study examines the transition between top contact and mixed contact of a spherical lens pressed against a periodically patterned substrate, utilizing experiments, numerical simulations, and theoretical analysis to develop a phase diagram that reveals the boundaries of different contact regimes.
Article
Chemistry, Physical
Gabriel Guyard, Alexandre Vilquin, Nicolas Sanson, Stephane Jouenne, Frederic Restagno, Joshua D. McGraw
Summary: The research demonstrates that polymers with different charges exhibit different dynamic properties under confined conditions, with neutral polymers showing chain-sized adsorbed layers and anionic polymer solutions displaying shear-rate-dependent apparent slip lengths.
