Review
Chemistry, Physical
Sebastian Bindgen, Jens Allard, Erin Koos
Summary: Liquid-liquid-solid systems, specifically capillary suspensions, have various applications and possess unique properties due to capillary bridges. Understanding the influences at different length scales is crucial in tailoring their mechanical properties to specific requirements.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jens Allard, Sanne Burgers, Miriam Candelaria Rodriguez Gonzalez, Yanshen Zhu, Steven De Feyter, Erin Koos
Summary: We demonstrate that particle roughness affects the formation and properties of liquid bridges in capillary suspensions, with rougher particles resulting in smaller and weaker bridges. Additionally, particle roughness also influences the formation and mechanical properties of clustered networks.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Mechanics
Deok-Hoon Jeong, Michael Ka Ho Lee, Virgile Thievenaz, Martin Z. Bazant, Alban Sauret
Summary: Dip coating is a process of coating a substrate with a thin liquid layer by withdrawing it from a bath. The presence of particles introduces new length scales and affects the thickness of the coating film. This study investigates the dip coating of suspensions with a bimodal size distribution of particles. It is found that the effective viscosity approach is still valid when the coating film is thicker than the diameter of the largest particles. A model is proposed to predict the probability of entraining the particles in the liquid film.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Chemistry, Physical
Ahmed Jarray, Annika Feichtinger, Elke Scholten
Summary: This study investigates the formation and rheological behavior of capillary suspensions through experimental and numerical analysis and demonstrates the effectiveness of Hansen solubility parameters theory in predicting their formation. The results show that the immiscibility between the main and secondary liquids, as well as the affinity between the dispersed particles and the secondary liquids, significantly affect the strength of the gel. Additionally, hydrogen bonding and polar interactions are found to control the formation of capillary suspensions. This simple approach can guide the selection of appropriate solvents and immiscible secondary liquids for the formulation of new particulate-based gels.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Mechanics
Alice Pelosse, Elisabeth Guazzelli, Matthieu Roche
Summary: In this paper, the spreading of droplets of density-matched granular suspensions on a solid surface was studied. Bidispersity of the particle size distribution enriched the conclusions drawn from monodisperse experiments by highlighting key elements of the wetting dynamics. Despite the complexity introduced by the presence of particles, the relation between the dynamic contact angle and the velocity of the contact line was similar to that for a simple fluid. The apparent wetting viscosity of the suspensions was found to differ from that measured in the bulk, and the size of the region inside the droplet where the value of the dynamic contact angle depends on a balance of viscous dissipation and capillary stresses was estimated.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Applied
Philipp L. Fuhrmann, Jeffrey Powell, Derick Rousseau
Summary: In this study, the role of cellulose sorptivity on the rheology and microstructure of oil-continuous capillary suspensions was investigated. It was found that water could structure the cellulose particles into a percolated network, resulting in suspensions with flowability and elasticity. The use of cellulose fibers increased the stiffness of the suspensions.
FOOD HYDROCOLLOIDS
(2023)
Article
Chemistry, Applied
Vincenzo Calabrese, Deniz Z. Gunes, Isabel Fernandez Farres
Summary: Two distinct coarse fractions of the yellow pea, the pea hull and the epidermal cell wall, can act as rheological modifiers of an oil phase. They can be used to structure the oil phase by increasing particle volume fraction or adding water to the dispersion, leading to increased viscosity and the development of pronounced elasticity.
FOOD HYDROCOLLOIDS
(2021)
Article
Optics
Gopal Verma, Gyanendra Yadav, Yuzhi Shi, Lei-Ming Zhou, Cheng-Wei Qiu, Wei Li
Summary: Manipulating micro/nanoparticles on deformed liquid interfaces induced by radiation pressure provides a non-invasive and contactless method. By using total internal reflection in retro-reflection mode, a bulge is created on the liquid surface, allowing precise control over the particles.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Beatrice Fickel, Niels Postulka, Maximilian Hartmann, Dirk M. Gruending, Maximilian Nau, Tobias Meckel, Markus Biesalski
Summary: By investigating meniscus shapes and capillary rise heights in modified glass capillaries, we are able to control capillary rise by balancing the centrifugal and volumetric forces. This system provides precise control over the propagation speed of the three-phase contact line, making it useful for studying wetting phenomena on surfaces that dynamically change upon fluid contact.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Multidisciplinary Sciences
Ophelie Ranquet, Celia Duce, Emilia Bramanti, Patrick Dietemann, Ilaria Bonaduce, Norbert Willenbacher
Summary: The authors use a combination of egg yolk and two pigments to investigate how different distribution of proteinaceous binder can control the flow behavior, drying kinetics, and chemistry of oil paints. This study demonstrates that adjusting the distribution of proteinaceous binder can enhance the stiffening effect and prevent undesired absorption of humidity, improving the brushability and preserving invaluable artworks.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Toru Ishigami, Taisei Karasudani, Shu Onitake, Mohammadreza Shirzadi, Tomonori Fukasawa, Kunihiro Fukui, Yasushi Mino
Summary: In this study, the rheological properties and microstructure formation of a ternary particle/oil/water dispersion system under shear flow were numerically investigated. The water-phase volume fraction and shear rate were found to significantly affect the microstructure and apparent viscosity. This is the first numerical study to demonstrate the correlation between microstructure formation and apparent viscosity in a ternary dispersion.
Article
Chemistry, Analytical
Zenghua Fan, Zixiao Liu, Congcong Huang, Wei Zhang, Zhe Lv, Lefeng Wang
Summary: This study investigates capillary bridges and forces between spherical concave grippers and spherical particles. The analysis includes parameters such as contact angle, radius ratio, and liquid bridge volume to discuss the influence on dimensionless capillary force. The effectiveness of the theoretical approach is verified through simulation models and experiments.
Review
Chemistry, Physical
Kuniaki Nagayama, Peter A. Kralchevsky
Summary: This paper introduces the concept and properties of lateral capillary forces, including their causes, effects, and similarities with gravitational and electric forces.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Guang Chen, Linjie Zhao, Jian Cheng, Mingjun Chen, Jinghe Wang, Wenyu Ding, Hongqin Lei
Summary: This study investigates the method of repairing nanoscale surface defects in KDP optics using DPN. The method utilizes dip-pen nanolithography and the water meniscus phenomenon. However, accurately predicting the water meniscus shape for evaluating the effectiveness of the repair is challenging due to high humidity and the penetration of the AFM probe. Therefore, a theoretical model is proposed, and its effectiveness is validated through comparison with experimental results.
Article
Materials Science, Multidisciplinary
Jiaqi Wang, Zhemiao Xie, Jiayu Alexander Liu, Guanxuan Lu, Rui Zhou, John T. W. Yeow
Summary: The development of mid-infrared (MIR) detectors is a hot research topic with significant progress in low-dimensional materials and clean-room fabrication strategies. These detectors have various applications such as industrial non-destructive testing, wearable safety monitoring, and Internet of Things. This study focuses on the photothermoelectric (PTE) mechanism in MIR detectors and proposes self-assembly carbon nanotube (CNT)-based detectors for sensitive and rapid IR detection. The results demonstrate the potential of PTE mechanism in broadening horizons for high-performance IR detectors in industrial applications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
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
Chemistry, Physical
Y. T. Aksoy, P. Eneren, E. Koos, M. R. Vetrano
Summary: This study found that even a small fraction of nanoparticles in fluids can affect the splashing behavior of a droplet upon impact on a smooth surface, promoting splashing at low Reynolds numbers. Through experiments and analysis, an empirical correlation describing the dependency of splashing threshold on nanoparticle concentration was proposed for the first time.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Mechanics
Irene Natalia, Randy H. Ewoldt, Erin Koos
Summary: This study reveals that Hertzian particle contacts are the underlying cause of unexplained noninteger power laws in weakly nonlinear rheology. The noninteger scalings are found to be related to the microstructure and contact angles of capillary suspensions. Additionally, the noninteger scalings of elastic and viscous stresses are associated with Hertzian-like contacts and adhesive-controlled friction, respectively.
JOURNAL OF RHEOLOGY
(2022)
Review
Chemistry, Physical
Sebastian Bindgen, Jens Allard, Erin Koos
Summary: Liquid-liquid-solid systems, specifically capillary suspensions, have various applications and possess unique properties due to capillary bridges. Understanding the influences at different length scales is crucial in tailoring their mechanical properties to specific requirements.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2022)
Article
Mechanics
Yunus Tansu Aksoy, Pinar Eneren, Erin Koos, Maria Rosaria Vetrano
Summary: In this research, the limitations of existing energy balance models in capturing the droplet spreading process were addressed. By studying the impact of droplets on a smooth sapphire surface and analyzing the data, the researchers improved the model by incorporating fluid viscosity and estimating the characteristic velocity of the viscous dissipation term. The resulting maximum droplet spreading model was shown to be more comprehensive and reliable compared to existing models, as confirmed by experimental data.
Article
Engineering, Biomedical
Lens M. Dedroog, Olivier Deschaume, Christian J. Garcia Abrego, Erin Koos, Yovan de Coene, Anja Vananroye, Wim Thielemans, Carmen Bartic, Minne P. Lettinga
Summary: This study reports a cell-compatible method based on shear stress, which allows for the fabrication of 3D uniformly aligned fibrillar collagen hydrogels. The method offers reproducibility and tunability, with minimal impact on the viability of embedded cells.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Physical
Jens Allard, Sanne Burgers, Miriam Candelaria Rodriguez Gonzalez, Yanshen Zhu, Steven De Feyter, Erin Koos
Summary: We demonstrate that particle roughness affects the formation and properties of liquid bridges in capillary suspensions, with rougher particles resulting in smaller and weaker bridges. Additionally, particle roughness also influences the formation and mechanical properties of clustered networks.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Yunus Tansu Aksoy, Lingyue Liu, Mohammad Abboud, Maria Rosaria Vetrano, Erin Koos
Summary: Splashing of liquid droplets onto a substrate is a complex fluid mechanical process, especially when using nanofluids. Even though the addition of nanoparticles to a Newtonian fluid does not change its viscosity, it significantly affects the splashing transition. While splashing is often simplified as a simple material subjected to a complex flow, the impact of nanoparticles complicates the problem. Hence, the study of the rheological properties of nanosuspensions is necessary in understanding this complex phenomenon.
Article
Pharmacology & Pharmacy
Maarten A. Mees, Fleur Boone, Thomas Bouwen, Frederik Vanaerschot, Charlotte Titeca, Hanna-Kaisa Vikkula, Leen Catrysse, Anja Vananroye, Erin Koos, Stelios Alexandris, Sabine Rosenfeldt, Samuel Eyley, Joachim Koetz, Geert van Loo, Wim Thielemans, Esther Hoste
Summary: High-mobility group box 1 (HMGB1) released during wounding delays skin regeneration. We discovered that dissolving glycyrrhizin in water forms a hydrogel with remarkable rheological properties. Glycyrrhizin-based hydrogels accelerate the closure of cutaneous wounds in normoglycemic and diabetic mice by influencing keratinocyte migration.
Article
Chemistry, Multidisciplinary
Ruben M. M. Dewes, Yanshen Zhu, Valentina Dami, Giovanni Baldi, Erin Koos, Tom Van Gerven
Summary: Ultrasound technology can significantly reduce the production time of nano-TiO2, especially when precursors with long alkoxide chains are used.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Yanshen Zhu, Johan Buitenhuis, Beate Foerster, Maria Rosaria Vetrano, Erin Koos
Summary: To address the challenges in temperature measurement for closed systems, researchers synthesized octylamine substituted CsPbBr3 perovskite quantum dots with doubled thermo-sensitivity. They developed an optical-based 2D temperature sensor using these ligand-modified quantum dots, which is applicable in microreactors and other environments where conventional thermal sensing protocols are not viable.
ACS APPLIED NANO MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
Justien Ghesquiere, Kenneth Simoens, Erin Koos, Nico Boon, Wim Teughels, Kristel Bernaerts
Summary: This study established a drip flow biofilm reactor to mimic the natural environment of the oral cavity and successfully created a complex multispecies periodontal model similar to that of a healthy individual. Using this model, the researchers validated the multifaceted effects of L-arginine on the oral biofilm, including inhibiting the growth and incorporation of pathogenic species, reducing biofilm thickness and volume, and producing specific metabolic products. This drip flow reactor setup shows promising potential for studying the spatiotemporal behavior of a multispecies periodontal community.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Editorial Material
Chemistry, Multidisciplinary
Hendrik Heinz, Yogesh M. Joshi, Hongbo Zeng, Heng-Kwong Tsao, Sissi J. A. de Beer, Erin Koos, Atsushi Takahara, Gilbert C. Walker
Article
Chemistry, Multidisciplinary
Jorik Waeterschoot, Willemien Gossele, Hojjat Alizadeh Zeinabad, Jeroen Lammertyn, Erin Koos, Xavier Casadevall Solvas
Summary: This study presents a novel method for the production of giant unilamellar vesicles (GUVs). Fluorinated silica nanoparticles (FNPs) are used to stabilize a lipid-containing aqueous droplet in a fluorinated oil, allowing the formation of GUVs. The encapsulated lipids can be released in an outer aqueous medium by a simple centrifugation process. The study demonstrates that this technique can produce contaminant-free GUVs comparable to those produced via electroformation, and it also shows the potential for incorporating transmembrane proteins.
Article
Chemistry, Physical
Kenneth Cerdan, Jesus Gandara-Loe, Giel Arnauts, Vedran Vangramberen, Anton Ginzburg, Rob Ameloot, Erin Koos, Peter Van Puyvelde
Summary: This study aims to understand the thermal polymerization mechanisms of humins from a rheological perspective for successful processing of humin-based materials. Thermal crosslinking of raw humins leads to the formation of a gel. The temperature plays an essential role in the crosslink density and the gel properties, with high temperatures delaying gel formation and low temperatures resulting in a stronger gel.
Article
Mechanics
Chen Liu, Jianzhong Lin, Zhenyu Ouyang
Summary: This study simulated the locomotion state and motion type of elliptical squirmers in a channel flow of power-law fluids. The influence of different parameters on the squirmers was explored, and it was found that coupled structures are prone to break and viscosity significantly affects the flow velocity and motion type of squirmers.
Article
Mechanics
E. E. Herrera-Valencia, M. L. Sanchez-Villavicencio, C. Soriano-Correa, O. Bautista, L. A. Ramirez-Torres, V. J. Hernandez-Abad, F. Calderas
Summary: This study investigated the electroosmotic flow of a viscoelastic fluid in a capillary system. The rheology of the fluid was characterized by a novel generalized exponential model equation, and the effect of charge density on the double-layer field and electrical forces was analyzed. Mathematical models were used to describe the rheological properties and flow performance of the fluid, and experimental data were used to make predictions. The study also examined the influence of applied forces on the structure of the fluid.
Article
Mechanics
Stefano Amadori, Giuseppe Catania
Summary: This article presents a multi-step, iterative technique for locally non-parametric identification of the standard linear solid (SLS) material model using fractional order time differential operators. Test input data consists of a set of identified material complex modulus values estimated at different frequency values obtained from input-output experimental measurements and quasi-static relaxation measurements on the same specimen. The proposed technique is based on an algebraic procedure to solve an overdetermined system of linear equations in order to obtain optimal values for the unknown parameters of the model. The procedure is non-parametric, as the order of the SLS model is initially unknown.
