Article
Multidisciplinary Sciences
Hyunki Kim, Subramanian Sundaram, Ji-Hwan Kang, Nabila Tanjeem, Todd Emrick, Ryan C. Hayward
Summary: The article introduces a light-driven active particle platform that can reconfigure interaction geometries and build oscillator and spinner networks. Using optically induced Marangoni trapping, thermal interactions among multiple particles lead to complex coupled oscillatory and rotational motions, demonstrating collective behavior.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Physical
Melika Motaghian, Thiemo van Esbroeck, Erik van der Linden, Mehdi Habibi
Summary: This study investigates the Marangoni spreading of a polymer-surfactant ternary solution deposited on a soap film with high surface tension. The experiments show that at low concentrations, the spreading dynamics are controlled by surface tension gradient and viscous dissipation, while at high concentrations, elastic forces dominate and lead to front destabilization.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Mechanics
Kalyani Kentheswaran, William Antier, Nicolas Dietrich, Benjamin Lalanne
Summary: In this study, axisymmetric numerical simulations are conducted to investigate the impact of surfactants on the hydrodynamics of rising bubbles. The results show that surfactants have significant effects on the rise velocity and deformation of the bubbles, as well as the immobilization of the interfaces and interfacial mass transfer. The findings reveal the couplings between interface immobilization, bubble deformation, rise velocity, and interfacial mass transfer.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Sheng Li, Ya-Zhou Chen, Ze Cheng, Jie Peng
Summary: This study comprehensively investigates the influence of soluble surfactant properties on the linear instability of a thin-film coating inside a rigid tube using long-wave approximation analysis and numerical calculation. The results reveal the contrasting roles of solubility, sorption kinetics, and bulk diffusivity in the interface mode and the surfactant mode.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Physical
Jiahui Guo, Ruisong Wang, Shiyu Zhang, Dion S. Antao
Summary: The temperature dependence of surface tension components in the van Oss-Chaudhury-Good model was characterized through detailed measurements of water and a group of water-immiscible liquids. The study found that while the components of surface tension were dependent on temperature, the relative contributions of the polar and nonpolar components remained constant over a certain temperature range.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Gourab Chakraborty, Satyajit Pramanik, Uddipta Ghosh
Summary: The linear stability of two-layer channel flows in the presence of bulk-soluble surfactants is investigated, considering the rheological properties of the interface. The bulk solubility of surfactants has a stabilizing effect on the interface, while the interfacial viscosities play a complex role depending on various factors. These results can contribute to the design of stable co-flow systems.
Article
Biochemistry & Molecular Biology
Mounir Fizari, Nicholas Keller, Paul J. Jardine, Douglas E. Smith
Summary: Many viruses release their DNA through a nanochannel in their shell, driven by internal forces caused by the tightly-packed genome. The speed of DNA exit is controlled by friction forces, but the exact nature of this friction is unclear. Through experiments with optical tweezers, we measured the mobility of tightly confined DNA and observed low initial exit velocity, exponential increase in velocity, stochastic pauses dominating the kinetics, and large dynamic heterogeneity. Our results provide evidence that DNA-DNA friction and clogging control the DNA exit dynamics, but do not significantly affect DNA packaging.
NUCLEIC ACIDS RESEARCH
(2023)
Article
Mechanics
Itamar Yacoby, Nathan Paldor, Hezi Gildor
Summary: The study focused on the geostrophic adjustment process in infinitely long zonal and meridional channels with different initial height distributions, revealing relationships between geostrophic rate, decay rate of inertial oscillations, and final state energy under various conditions. The effects of boundaries in meridional channels were also explored, with observations on wave energy ratios changing with channel width.
Article
Thermodynamics
Mohammad Amin Kazemi, Sepehr Saber, Janet A. W. Elliott, David S. Nobes
Summary: The study reveals the occurrence of Marangoni convection in an evaporating pure water drop, with convective structures observed through careful preparation of the test liquid suspension. A mathematical model was developed and numerically solved to further support the experimental data. The research stands out as it allows the droplet to evaporate spontaneously in normal laboratory conditions, without external heating of the substrate.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Nuclear
Francesca Sammarruca, Randy Millerson
Summary: This study presents predictions for a range of properties in symmetric nuclear matter, including single-particle properties and short-range correlations, based on high-quality nucleon-nucleon potentials and an internally consistent ab initio approach.
Article
Chemistry, Multidisciplinary
Nanning Petersen, Martin Girard, Andreas Riedinger, Omar Valsson
Summary: The steric stability of inorganic colloidal particles in apolar solvents relies on the balance between van der Waals attraction, free energy of mixing, and ligand compression. However, for cadmium selenide nanoplatelets, solvation forces play a crucial role and are proportional to the interacting facet area, strongly influenced by the softness of the ligand shell.
Article
Mechanics
Marcello Lappa, Wasim Waris
Summary: This study investigates the patterns created by periodically distributed wall-mounted hot blocks with a cubic shape in a layer of liquid through numerical simulations. The researchers focus on understanding the emergence of ensemble properties from localized effects. The study reveals that self-organization driven by surface tension or buoyancy-Marangoni effects can lead to aesthetically appealing "quantized states" that do not depend on the number of wall-mounted elements.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Carlos Quental, Francisca Simoes, Mariana Sequeira, Jorge Ambrosio, Joao Paulo Vilas-Boas, Motomu Nakashima
Summary: This study discusses the limitations of external forces acquisition in musculoskeletal modeling and analysis of swimmers and proposes a methodology for inverse dynamic analysis that integrates motion-capture data, hydrodynamic force estimation by Swumsuit, and computation of internal forces. The proposed methodology is demonstrated by analyzing a full-body biomechanical model for a front-crawl swimming stroke, and the results are consistent with existing literature, showing the feasibility of the proposed method.
MULTIBODY SYSTEM DYNAMICS
(2023)
Article
Materials Science, Multidisciplinary
Md Irfanul Haque Siddiqui, Hassan Alshehri, Jamel Orfi, Masood Ashraf Ali, Dan Dobrota
Summary: The motion behavior of non-metallic inclusion particles in a solidifying weld pool is influenced by various factors such as upsetting rate and interfacial tension. The upsetting setting parameters have a substantial effect on the overall non-metallic inclusion motion, impacting the distribution and movement of inclusions in joint areas. Additionally, the interfacial tension between the inclusions and the molten steel plays a significant role in controlling the pushing and engulfment of inclusions at the solid-liquid interface.
Article
Chemistry, Physical
Appurva Tiwari, Sehyun Shin, Seong Jae Lee, Ashish Kumar Thokchom
Summary: This study investigates the factors affecting the deposition pattern of evaporating droplets containing dispersed colloids and surfactants, including particle shape, particle and surfactant concentration, and contact angle and contact line dynamics. The results demonstrate that manipulation of these parameters can control the formation of deposition patterns.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2023)
Article
Physics, Fluids & Plasmas
Clement Gouiller, Florence Raynal, Laurent Maquet, Mickael Bourgoin, Cecile Cottin-Bizonne, Romain Volk, Christophe Ybert
Summary: In this experimental study, the mixing properties of interfacial colloidal floaters were influenced by chemical and hydrodynamical currents generated by self-propelled camphor disks swimming at the air-water interface. Despite reaching a statistically stationary state, the floaters remained only partially mixed, resulting from a competition between mixing and unmixing processes. Additionally, the system developed turbulent-like concentration spectra with various regions characterized by different flow effects.
PHYSICAL REVIEW FLUIDS
(2021)
Article
Chemistry, Physical
Natsuda Klongvessa, Christophe Ybert, Cecile Cottin-Bizonne, Takeshi Kawasaki, Mathieu Leocmach
Summary: In this study, the researchers investigate the behavior of active glasses, which are defined by relaxation times longer than the observation time. They demonstrate that there is a nonmonotonic response in the dynamics of active glass, and attribute it to activity enhanced aging.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Naval Singh, Adnan Chakra, Goran T. Vladisavljevic, Cecile Cottin-Bizonne, Christophe Pirat, Guido Bolognesi
Summary: This study presents an optimized protocol for the manufacturing of composite flow focusing devices and demonstrates three different applications of these devices. The devices enable particle spreading, accumulation, and synthesis of liposomes through diffusiophoresis transport induced by salt concentration gradients. The effects of particle properties and device structure on particle dynamics were investigated, and controlled narrow size distributions of liposomes could be achieved. Composite NOA/silicon flow junction devices offer a competitive alternative to conventional PDMS chips and support a wide range of microfluidic applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Dolachai Boniface, Julien Sebilleau, Jacques Magnaudet, Veronique Pimienta
Summary: In this study, a series of experiments were conducted to investigate the dynamic behavior of a dichloromethane drop deposited on a water solution containing a surfactant. The results showed that the drop exhibited an induction stage, oscillations along the contact line, and a spontaneous spinning motion, with a stable spinning rate. These phenomena were attributed to the Marangoni effect induced by the dissolution of dichloromethane.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Naval Singh, Goran T. Vladisavljevic, Francois Nadal, Cecile Cottin-Bizonne, Christophe Pirat, Guido Bolognesi
Summary: The study investigates the effects of salt contrast and groove depth on the accumulation process of colloidal particles in microgrooves, and determines the experimental conditions that lead to high particle concentration peaks. The sufficient and necessary conditions for particle accumulation are derived. The controlled and enhanced accumulation of colloidal particles in dead-end structures by solute concentration gradients has potential applications in soft matter and living systems.
Article
Physics, Fluids & Plasmas
Christophe Pirat, Cecile Cottin-Bizonne, Choongyeop Lee, Stella M. M. Ramos, Olivier Pierre-Louis
Summary: This study reports a well-controlled experiment of drop breakup, where bubble growth is triggered by a decrease in ambient pressure. The researchers found a transition from top-breakup to triple-line breakup depending on the initial contact angle of the drop. A minimal model based on inertial dynamics and constant bubble pressure is proposed, which accurately captures the growth of the bubble and the distinction between top or triple-line breakup.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Physics, Fluids & Plasmas
Thomas Bickel, Francois Detcheverry
Summary: This study investigates the Marangoni spreading of surface-active molecules at a liquid interface and provides fully explicit solutions for different initial surfactant distributions. The influence of surface diffusion is also discussed. The findings of this study can serve as reference solutions for experimental testing of Marangoni spreading with fluorescent or photoswitchable surfactants.
Article
Physics, Fluids & Plasmas
Clement Gouiller, Christophe Ybert, Cecile Cottin-Bizonne, Florence Raynal, Mickael Bourgoin, Romain Volk
Summary: The study focuses on the dynamics of a group of Marangoni surfers in a two-dimensional and unconfined space, ranging from single swimmer behavior to the interaction of multiple particles. The model successfully reproduces the transition observed in experiments from dispersion to crystallization at different swimmer densities.
Article
Physics, Multidisciplinary
Julien Lombard, Julien Lam, Francois Detcheverry, Thierry Biben, Samy Merabia
Summary: Plasmonic vapor nanobubbles can emit strong pressure waves when generated around a laser-heated nanoparticle in water, especially when the fluid is in a supercritical state. These waves can induce spatially and temporally localized damage, with acoustic-mediated perforation found to be more efficient than nanobubble expansion for breaching cell membranes.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Chemistry, Physical
Christopher A. E. Hamlett, Dolachai N. Boniface, Anniina Salonen, Emmanuelle Rio, Connor Perkins, Alastair Clark, Sang Nyugen, David J. Fairhurst
Summary: This article explores a method of generating large bubbles by gently blowing downwards, and the impact of different surfactants on bubble stability. The size of the bubbles can be significantly increased compared to the size of the wand used, and different surfactants such as Fairy liquid and SDS solutions can be used to achieve similar results.