Article
Chemistry, Multidisciplinary
Marco Rocca, Maxime Dufresne, Marie Salva, Christof M. Niemeyer, Emmanuel Delamarche
Summary: A new method is introduced for in situ formation of hydrogels with precise geometries using interfacial polymerization in a sealed microfluidic chip. The characteristics of the hydrogel can be easily adjusted, the method is fast and does not require specific laboratory equipment.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Mechanics
M. G. Cabezas, N. Rebollo-Munoz, M. Rubio, M. A. Herrada, J. M. Montanero
Summary: In this study, the stability of steady jetting tip streaming generated by focusing liquid streams through an axisymmetric nozzle was analyzed using numerical and experimental methods. The critical conditions leading to instability and the classification of unstable perturbations were determined. Experimental results were compared with numerical stability limits, showing reasonable agreement and confirming the predicted instability mechanisms.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Chemical
Wasif Razzaq, Christophe A. Serra, Leandro Jacomine, Delphine Chan-Seng
Summary: The study focuses on the application of microfluidic spinning in the production of microfibers. Microfibers were produced by in-situ photoirradiation using a capillary-based microfluidic device and a miscible sheath phase of various viscosity. The effects of flow rate, viscosity, capillary dimensions, and monomer volume fraction were thoroughly studied.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Engineering, Environmental
Wei -Yi Chu, Yi-Ru Chiou, Ren-Hao Luo, Tzu-Heng Chen, Cheng-Ju Yu, Yi-Ju Chou, Huan-Tsung Chang, Chien-Fu Chen
Summary: This article introduces a new technique for the synthesis of colloidosomes using a microfluidic droplet device and partially miscible liquids. By dissolving liquids within droplets, hydrophilic nanoparticles can be close-packed at the liquid interface to form colloidosomes. This method also enables colloidosomes to be synthesized within a narrow range of sizes. The close-packing of nanoparticles is confirmed by modifying colloidosomes into signal-enhanced lateral flow assays, which demonstrates their potential application in bacterial detection platforms, drug encapsulation, and biosensing.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Caiyun Cheng, Chao Yuan, Bo Cui, Lu Lu, Jianpeng Li, Haojie Sha
Summary: By studying the interfacial behavior of cyclodextrins and the physico-chemical properties of emulsions, it was found that Pickering emulsions stabilized by alpha-CD and 8-CD had better stability and rheological properties, while emulsions stabilized by HP-CD derivatives were prone to delamination and sedimentation.
FOOD HYDROCOLLOIDS
(2023)
Article
Mechanics
J. S. Smink, C. H. Venner, C. W. Visser, R. Hagmeijer
Summary: Power minimisation in fluid transport is crucial for microfluidics, additive manufacturing, and hierarchical functional materials. The traditional Murray's theory is extended to include non-Newtonian and yield-stress fluids, providing a graphical approach for determining optimal radii and angles in branching networks. The study reveals a uniform wall shear stress and self-similar velocity profile. The impact of non-optimal channel radii on power consumption is investigated, and the approach is demonstrated using various examples.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Physical
Chunhong Nie, Yupeng Zhang, Huan Du, Guoqiang Han, Jiangrui Yang, Lili Li, Hongjun Wu, Baohui Wang, Xirui Wang
Summary: This study investigated the adsorption and intermolecular interactions of surfactant and polymer at the oil-water interface in solar thermal demulsification of oil/water emulsion. It was found that solar thermal field changed the configuration and motion behavior of surfactant and polymer, weakening their interaction energy and promoting surfactant extension into the oil phase. This increased interfacial tension and decreased the rigidity and strength of the interface, facilitating coalescence and eventual oil-water separation.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Iurii Alekseevich Babkin, Aniket Pradip Udepurkar, Hannes Van Avermaet, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens, Guy van den Mooter, Simon Kuhn, Christian Clasen
Summary: Quantum dots (QDs) are semiconductor nanocrystals used in optoelectronic applications. Most modern QDs are based on toxic metals and do not comply with EU regulations. However, there are promising developments in safer QD alternatives based on elements from the III-V group. This study focuses on encapsulating InP-based QDs in polymer microbeads for improved photostability.
Article
Energy & Fuels
Marcelo D. D. Benitez, Qi Liu, J. Carlos Santamarina
Summary: The accumulation of amphiphilic molecules, nanoparticles, or microorganisms at interfaces has significant effects on multiphase flow in porous media. By optimizing the composition of stable organo-bentonite suspensions, we enhance particle adsorption onto the oil-water interface. We investigate the time-dependent effects on surface tension and observe the development of a shell-like interface during droplet contraction, which experiences buckling and wrinkle formation.
Article
Mechanics
X. Guan, J-M Vanden-Broeck, Z. Wang
Summary: This paper investigates progressive capillary waves on the interface between two homogeneous fluids. Through numerical methods and numerical continuation, the global bifurcation of periodic travelling waves is explored, resulting in self-intersecting and boundary-touching limiting profiles. Theoretical investigation predicts the limiting configurations for most parameter sets and is in good agreement with numerical results.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Engineering, Environmental
Hongye Li, Xunli Zhang, Qingqiang Wang, Nan Jin, Haisheng Wei, Yuchao Zhao
Summary: This study employed Pickering emulsion to enhance the oxidation of benzyl alcohol catalyzed by Pd/SiO2 nanoparticles in a microchannel reactor. The experimental results showed that the O/W Pickering emulsion system was superior to the W/O system for the catalytic oxidation reaction. The optimized reaction conditions included a reaction temperature of 403 K, a CB of 5 wt%, an O2/BNOH ratio of 0.76, and a tube length of 8 m. Under these conditions, the conversion of BNOH and the selectivity of benzaldehyde were found to be 86.53% and 99.79%, respectively. The study provides important insights for effectively performing multiphase catalytic reactions involving solid catalyst particles in microchannel reactors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Food Science & Technology
Yuanhang Yao, Jiaxing Jansen Lin, Xin Yi Jolene Chee, Mei Hui Liu, Saif A. Khan, Jung Eun Kim
Summary: The study demonstrates that microfluidic technology can effectively encapsulate lutein in food products, and both the type of oil and device do not affect the bioaccessibility of lutein.
Article
Mechanics
Fangjing Luo, Jianxin Yang, Ruixue Zhou, Yao Li, Tianyang Luan, Zongbao Li, Jiayin Wu, Qian Shou, Xiaobo Xing
Summary: This study presents a novel micromixer for efficient and controllable mixing based on photothermal vortices. The vortices, generated from an array of linear heat sources excited by a laser, provide stable disturbance to fluid interfaces and enhance the mixing efficiency. The study reveals the interactions between vortices and the mixing mechanism of fluids, and explores the effects of various factors on the mixing performance.
Article
Water Resources
Mahdi Mansouri-Boroujeni, Cyprien Soulaine, Mohamed Azaroual, Sophie Roman
Summary: Immiscible two-phase flow through porous media is composed of a series of pore invasions. The consequences of pore-scale processes on macroscopic fluid front behavior are investigated. Different invasion mechanisms and front behaviors are characterized and correlated for various flow conditions. A new crossover flow regime is identified, showing mixed behavior between capillary and viscous dominated regimes. The global front behavior is predicted based on numerical simulations and experimental results for all flow regimes.
ADVANCES IN WATER RESOURCES
(2023)
Article
Chemistry, Physical
Xiaoyang Yu, Ke Qiu, Huan Li, Xuyang Miao, Jiyun Wang, Qian Li, Shouxiang Lu
Summary: Transition-metal coordination complexes have the potential to be used in advanced structural materials due to their ability to regenerate after rupture. The integration of these complexes in foam materials has been rarely reported. In this study, hydrolyzed rice proteins (HRP) were used to create long-lived foams with high yield stress, and the presence of transition metal ions resulted in a mechanically strong film.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Surgery
Emily Lenart, Dina Filiberto, Peter Fischer, Isaac Howley, Saskya Byerly
Summary: Isolated facial fractures (IFF) are often overtriaged and can be managed without surgery. However, they are frequently transferred between hospitals, suggesting the potential for outpatient follow-up or telehealth consultation to decrease resource utilization.
AMERICAN JOURNAL OF SURGERY
(2023)
Article
Chemistry, Physical
Kim Mishra, Nico Kummer, Jotam Bergfreund, Fabian Kampf, Pascal Bertsch, Robin Pauer, Gustav Nystrom, Peter Fischer, Erich J. Windhab
Summary: The crystallization behavior of lipids, especially triacylglycerols, has been studied using various microscopy techniques. It has been found that the shear rate during crystallization affects the structure and growth of crystalline particles. The aggregation of crystallites and the formation of clusters are rate limiting steps in the process. The findings of this study have potential implications in adipose tissue regeneration, microbial lipid crystalline network formation, and energy-efficient chocolate production.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Diego Milian, Nak Heon Choi, Misgina Tilahun Tsehaye, Peter Fischer, Jens Tuebke, Cristina Iojoiu, Denis C. D. Roux, Nadia El Kissi
Summary: This study presents rheometry as an optimization tool to increase discharge performance of a zinc slurry-air redox flow battery. By investigating the incorporation of electrode suspension slurry to metal-air batteries, the optimal concentration of polyacrylic acid (PAA) for the zinc slurry system was determined, leading to improved performance in the battery.
JOURNAL OF POWER SOURCES
(2023)
Article
Multidisciplinary Sciences
Hamed Almohammadi, Sandra Martinek, Ye Yuan, Peter Fischer, Raffaele Mezzenga
Summary: In the process of nucleation and growth, thermodynamics and kinetics play crucial roles in determining the composition, shape, structure and physical properties of heterogeneous colloidal systems. By selectively choosing colloidal systems and controlling phase separation, we can separate the effects of kinetics from thermodynamics and discover new physical phenomena. This approach enables the on-demand fabrication of multicomponent heterogeneous liquid crystals and opens up new research directions in multicomponent structured fluids.
NATURE COMMUNICATIONS
(2023)
Article
Anesthesiology
Stephan Felder, Peter Fischer, Klaus Boehler, Stefan Angermair, Sascha Treskatsch, Wilfried Witte
Summary: For many years, organ transplantation from postmortem donors has been a crucial therapy for patients with irreversible organ failure. However, in Germany, there has been a disparity between the number of organ donations and the number of patients on the waiting list. The management of anesthesia during multiple organ harvesting from postmortem donors is challenging due to various factors, including limited practical expertise, complex physiological changes, and the absence of guidelines. This paper reviews existing literature to determine evidence-based recommendations for anesthesia management in this context.
ANASTHESIOLOGIE INTENSIVMEDIZIN NOTFALLMEDIZIN SCHMERZTHERAPIE
(2023)
Article
Biochemistry & Molecular Biology
Lea Andree, Pascal Bertsch, Rong Wang, Malin Becker, Jeroen Leijten, Peter Fischer, Fang Yang, Sander C. G. Leeuwenburgh
Summary: We developed a versatile hydrogel platform using modular building blocks, allowing for the design of customized hydrogels with specific physical architecture and mechanical properties. By assembling different combinations of gelatin methacryloyl (Gel-MA) and gelatin nanoparticles, we demonstrated the versatility of the platform. The incorporation of particles resulted in softer hydrogels with enhanced stress relaxation, and the stiffness of the hydrogels influenced cell behavior.
Article
Chemistry, Applied
Pascal Bertsch, Lukas Bocker, Ann-Sophie Palm, Jotam Bergfreund, Peter Fischer, Alexander Mathys
Summary: Proteins from microalgae have the potential to replace animal-based proteins in the human diet or as functional ingredients. Understanding the effect of physicochemical conditions on their adsorption behavior and interfacial network formation is crucial.
FOOD HYDROCOLLOIDS
(2023)
Review
Surgery
Lynley Matthews, Emma Kelly, Andrew Fleming, Saskya Byerly, Peter Fischer, Ian Molyneaux, Andrew Kerwin, Isaac Howley
Summary: This review evaluates the research on outcomes based on field triage to a Level 1 trauma center (L1TC) compared to other levels of hospitals and non-trauma centers. The findings show that the survival benefit of L1TC care is largest for patients with the most severe injuries.
JOURNAL OF SURGICAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Tobias Lojewski, Mohamed F. Elhanoty, Loic Le Guyader, Oscar Granaes, Naman Agarwal, Christine Boeglin, Robert Carley, Andrea Castoldi, Christian David, Carsten Deiter, Florian Doering, RobinY Engel, Florian Erdinger, Hans Fangohr, Carlo Fiorini, Peter Fischer, Natalia Gerasimova, Rafael Gort, Frank deGroot, Karsten Hansen, Steffen Hauf, David Hickin, Manuel Izquierdo, Benjamin E. Van Kuiken, Yaroslav Kvashnin, Charles-Henri Lambert, David Lomidze, Stefano Maffessanti, Laurent Mercadier, Giuseppe Mercurio, Piter S. Miedema, Katharina Ollefs, Matthias Pace, Matteo Porro, Javad Rezvani, Benedikt Roesner, Nico Rothenbach, Andrey Samartsev, Andreas Scherz, Justina Schlappa, Christian Stamm, Martin Teichmann, Patrik Thunstrom, Monica Turcato, Alexander Yaroslavtsev, Jun Zhu, Martin Beye, Heiko Wende, Uwe Bovensiepen, Olle Eriksson, Andrea Eschenlohr
Summary: By combining femtosecond time-resolved X-ray absorption spectroscopy with ab initio time-dependent density functional theory, we analyze the electronic structure of fcc Ni on a femtosecond time scale. We observe transient broadening and energy shifts in the absorption spectra, which are explained by electron repopulation and correlation-induced modifications of the electronic structure, accounting for the local Coulomb interaction.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Nico Kummer, Caroline E. Giacomin, Peter Fischer, Silvia Campioni, Gustav Nystrom
Summary: Amyloid fibrils from inexpensive food proteins and nanocellulose have diverse applications and their hybrid materials have improved mechanical properties due to electrostatic interactions. These interactions increase the elasticity of the amyloid network by cross-linking individual fibrils. The combination of nanocellulose morphology contributes differently to the elasticity, with cellulose nanocrystals inducing bundling and network formation, and cellulose nanofibrils forming a second network. The gained knowledge on colloidal interactions provides a basis for designing functional biohybrid materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Caroline E. Giacomin, Rebecca Yun Chen, Erwin Hack, Peter Fischer
Summary: This study investigates the formation and properties of tea film, also known as tea scum, on the surface of tea infusions. The composition of water, tea varieties, and tea additives are found to impact the strength and structure of the film. Green tea forms more visible layers than black tea in soft and moderate water, while black tea demonstrates greater surface strength. In hard water, green tea has greater surface strength than black tea. Rooibos tea does not form visible layers or strengthen the surface. Adding β-casein, a protein found in milk, increases the resilience of black tea film.
Article
Biochemical Research Methods
Xiaobao Cao, Tomas Buryska, Tianjin Yang, Jing Wang, Peter Fischer, Aaron Streets, Stavros Stavrakis, Andrew deMello
Summary: Droplet-based microfluidic systems have become popular in high throughput screening due to their flexibility, high-throughput capabilities, and efficient processing of small volumes. However, the challenges of performing customized operations on user-defined droplets have limited their use in complex screening applications. To address this, the integration of droplet- and valve-based microfluidic technologies provides a solution for controlling droplet manipulations while maintaining analytical throughput. This article presents a microfluidic platform that combines microvalve technology with droplet-based compartmentalization to achieve programmable fluid handling. The platform allows for the execution of user-defined reaction protocols within storage chambers by merging droplets containing specified reagents.
Meeting Abstract
Critical Care Medicine
Allison McLeod, Alison Stonecipher, Whitney Holmes, Saskya Byerly, Dina Filiberto, Peter Fischer, Roland Dickerson
CRITICAL CARE MEDICINE
(2023)
Article
Chemistry, Multidisciplinary
Ashutosh Sinha, Nico Kummer, Tingting Wu, Kevin J. De France, Dorothea Pinotsi, Janine L. Thoma, Peter Fischer, Silvia Campioni, Gustav Nystrom
Summary: Proteins tend to coat solid surfaces and form amyloid-like structures upon exposure. In this research, aerogels created from TEMPO-oxidized cellulose nanofibers are used as bio-based templates to induce and accelerate protein aggregation, showing the significance of this study.
Article
Chemistry, Multidisciplinary
Nico Kummer, Luc Huguenin-Elie, Adrian Zeller, Yashoda Chandorkar, Jean Schoeller, Flavia Zuber, Qun Ren, Ashutosh Sinha, Kevin De France, Peter Fischer, Silvia Campioni, Gustav Nystrom
Summary: Amyloid fibrils made from hen egg white lysozyme can be used to create 2D foam films with broad-spectrum antimicrobial properties, offering a potential alternative to small-molecule antibiotics. These films can be deposited on various substrates, creating a homogenous coating layer with antimicrobial effects against clinically relevant pathogens. This method presents a new approach for continuous production and could be used in the biomedical sector for wound dressings.
NANOSCALE ADVANCES
(2023)