Article
Chemistry, Physical
Justin Engstler, Nicolas Giovambattista
Summary: Water-mediated interactions play important roles in aqueous solutions, affecting processes such as protein folding and nanoparticle aggregation. This study investigates the impact of temperature and pressure on different types of interactions between graphene-based surfaces. The results show that hydrophobic, hydrophilic, and hybrid interactions are all sensitive to pressure, while only hydrophobic interactions are significantly affected by temperature variations. The findings have implications for understanding protein denaturation and biomolecular interactions, as well as for the design of water models for molecular and nanoparticle systems under different thermodynamic conditions.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Diling Yang, Lei Xie, Xiaohui Mao, Lu Gong, Xuwen Peng, Qiongyao Peng, Tao Wang, Qi Liu, Hongbo Zeng, Hao Zhang
Summary: The study found that the hydrophobic interaction of low molecular weight polystyrene with air bubbles or oil droplets is slightly weaker, and the interaction in aqueous solutions with alcohol additives is weaker than in pure aqueous solutions. The addition of surface-active species in the medium can suppress the attachment of hydrophobic polymers to air bubbles or oil droplets.
Article
Chemistry, Physical
Fabio Staniscia, Horacio Guzman, Matej Kanduc
Summary: This study investigates the adsorption behavior of short-chained alcohols to water-vapor interfaces and solid surfaces with different polarities using molecular dynamics simulations. The researchers derive an equation for the adsorption coefficient, which shows exponential dependence on both molecular surface area and surface wetting coefficient. The findings suggest that the influence of surfactants on sessile droplets is strongest on highly hydrophilic and hydrophobic surfaces, while moderately hydrophilic surfaces are less affected.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Olivera Drecun, Cecilia Bernardini, Misbah Sarwar, Alberto Striolo
Summary: This study investigates the interactions and agglomeration of γ-alumina nanoparticles in water and salt solutions. Molecular dynamics simulations are used to characterize surface effects, and dynamic light scattering experiments are conducted to study agglomeration at the macroscale. The results highlight the capability of molecular simulations to explain macroscopic observations.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
E. Nakouzi, S. Kerisit, B. A. Legg, S. Yadav, D. Li, A. G. Stack, C. J. Mundy, J. Chun, G. K. Schenter, J. J. De Yoreo
Summary: Solid-liquid interfaces play a crucial role in various phenomena such as colloidal aggregation, crystallization, catalysis, nucleation, water desalination, and biomolecular assembly. This study investigates the influence of hydrophilic and hydrophobic probes on interfacial solution structure using three-dimensional atomic force microscopy (3D AFM). The results show that hydrophilic probes exhibit good agreement with molecular dynamics simulations, while hydrophobic probes detect vertical oscillatory features without matching the underlying lattice. It is also found that the repulsive hydration force between the probe and mica depends on the nature and concentration of ions in the solution. Based on these findings, a scheme for controlling particle aggregation and attachment outcomes by tuning hydration force is proposed.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Bekir Sami Yilbas, Abba Abdulhamid Abubakar, Johnny Ebaika Adukwu, Ghassan Hassan, Hussain Al-Qahtani, Abdullah Al-Sharafi, Muhammet Unal, Ammar Alzaydi
Summary: This paper introduces an innovative method for dust mitigation from a hydrophobic surface using a sessile water droplet. The study analyzes the behavior of the droplet and its effectiveness in dust removal under different plate spacings and droplet sizes. The findings show that reducing the plate spacing increases the droplet size and enhances the dust removal rate.
Article
Engineering, Chemical
Luyi Lu, Lida Zhu, Xueqing Liu, Jianlan Li
Summary: This study investigates the self-cleaning characteristics of hydrophobic and hydrophilic surfaces on solar photovoltaic (PV) glass through experimental and theoretical research. It reveals that these surfaces go through different self-cleaning stages under the influence of various forces and that the cleaning time can be affected by the contact angle and the properties of liquid droplets and particles. The findings demonstrate the potential for improving the self-cleaning abilities of PV glass.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Polymer Science
Haohui Huo, Jie Liu, Senthil Kannan, Long Chen, Yimin Zhao, Lei Zhang, Gang Chang, Qilu Zhang, Feng Liu
Summary: This study presents the first example of protein-like multicompartment nanoparticles formed via self-assembly of a specifically designed 21-arm star polymer, PEG(PAA-b-PS)(20). The morphology of the MCNs is determined by the volume ratio of PS to PAA, and unique string structures composed of one-dimensional alignment of single-star polymers were observed for the first time. A new mechanism for the assembly of star polymers was proposed based on investigations under different conditions, suggesting potential applications in drug delivery and catalysis.
Article
Environmental Sciences
Xueqing Liu, Xiaodong Zhao, Luyi Lu, Jianlan Li
Summary: Photovoltaic power generation technology is an important method for achieving carbon neutralization. This study investigates the effects of liquid bridges formed on the surfaces of hydrophobic and hydrophilic PV glass and their self-cleaning abilities. The results show that liquid bridges enhance the self-cleaning forces and contribute to the prevention and reduction of dust accumulation on glass.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Luis Humberto Robledo-Taboada, Javier Francisco Jimenez-Jarquin, Fernando Chinas-Castillo, Antonio Mendez-Blas, Santiago Camacho-Lopez, Laura Elvira Serrano-de La Rosa, Magdaleno Caballero-Caballero, Rafael Alavez-Ramirez, Martha Hilaria Bartolo-Aleman, Efren Normando Enriquez-Porras
Summary: This study investigated the effects of surface texturing on friction and wear using different current levels to anodize p-type silicon samples. The results showed that low currents generated mesoporous silicon surfaces with low friction, while high currents generated macroporous silicon surfaces with high friction. The study also revealed a direct correlation between pore size and wear volume, as well as scar diameter.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Review
Polymer Science
Peter H. Santschi, Wei-Chun Chin, Antonietta Quigg, Chen Xu, Manoj Kamalanathan, Peng Lin, Ruei-Feng Shiu
Summary: Microgels play critical roles in various ocean processes, with exopolymeric substances from marine microbes being a major source. Many types of pollutants, especially hydrophobic ones, have been found to preferentially associate with marine microgels, impacting their transport and fate in the ocean. This review focuses on the interactions between gel-forming EPS and pollutants in the ocean.
Article
Polymer Science
Monica Brachi, Paulo Henrique M. Buzzetti, Karine Gorgy, Dan Shan, Pierre Audebert, Alan le Goff, Hong Li, Redouane Borsali, Serge Cosnier
Summary: In this study, fluorescent organic 2,5,8-tris((adamantan-1-yl)-methoxy)-heptazine (HTZ-Ad) was solubilized in water by inclusion of adamantane groups into free beta-cyclodextrins or a cyclodextrin shell of glyconanoparticles. The modified nanoparticles showed fluorescence emission both in aqueous media and in their adsorbed state, providing the first spectroscopic characterization of a trialkoxyheptazine in aqueous medium. The binding of the glyconanoparticles to a surface was achieved through host-guest interactions with an electrochemically generated poly(pyrrole-adamantane) film, resulting in spatially controlled fluorescence.
Article
Chemistry, Multidisciplinary
Manuel R. Uhlig, Simone Benaglia, Ravindra Thakkar, Jeffrey Comer, Ricardo Garcia
Summary: Hydration layers form on hydrophilic and hydrophobic crystalline surfaces, but on hydrophobic surfaces, water molecules are expelled and replaced by hydrocarbon molecules near the surface, creating a new interfacial layer.
Article
Nanoscience & Nanotechnology
Yihan Song, Michaela Dunleavy, Lei Li
Summary: Researchers have developed a simple and effective method to make plastic surfaces hydrophilic/oleophobic by coating them with a perfluoropolyether and irradiating them with UV/Ozone. The treated plastics exhibit both hydrophilicity and oleophobicity, as confirmed by contact angle measurements and FTIR results. These functionalized plastics show superior antifogging performance and detergent-free cleaning capability, and do not degrade in aging tests.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Samuel Stenberg, Clifford E. Woodward, Jan Forsman
Summary: The study demonstrates quantitative and qualitative differences in interactions between two perfectly conducting surfaces in a salt solution compared to those between equally charged non-conducting surfaces. Despite these differences, there are also similarities in behaviors. The dependence of the free energy barrier height on salt concentration displays a non-monotonic relationship, reaching a minimum when a flat profile of apparent surface charge density is achieved, outside the Stern layer.
Article
Engineering, Biomedical
Shiva Taheri, Zahra Sadat Ghazali, Leila Montazeri, Fatemeh Ale Ebrahim, Jafar Javadpour, Khorshid Kamguyan, Esben Thormann, Philippe Renaud, Shahin Bonakdar
Summary: The effect of cell imprinted substrates on the differentiation of ADSCs was investigated. The results showed that cell imprinted substrates can induce differentiation signals better than engineered lithographic substrates. Therefore, the patterns must include nano-topographies to have reliable and reproducible engineered substrates.
BIOMEDICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Frederik Hegaard, Robert Biro, Koosha Ehtiati, Esben Thormann
Summary: In this study, the interactions between mobile ions and immobile charges within a sulfobetaine-based polyzwitterionic film were systematically investigated. The swelling behavior of the film in the presence of different salts was compared, and it was found that specific types of anions significantly influenced the swelling of the polycationic films. Furthermore, it was observed that the degree of swelling of the zwitterionic films depended on the anion type and increased with increasing ionic strength.
Article
Biophysics
Ali Asghar Hakami Zanjani, Anna Mularski, Anne Sofie Busk Heitmann, Catarina Dias, Michelle Ege Moller, Kenji Maeda, Jesper Nylandsted, Adam Cohen Simonsen, Himanshu Khandelia
Summary: Using molecular dynamics simulations, the study reverse engineered an ANXA3-mutant that can trimerize on the membrane surface and induce high curvature, similar to ANXA4. However, despite its trimer-forming and curvature-inducing properties, the engineered ANXA3 does not accumulate near a membrane lesion and is unable to repair the lesion. These findings provide insights into the factors driving annexin-mediated membrane repair and highlight the importance of high membrane binding affinity in addition to trimer formation and induction of negative membrane curvature.
BIOPHYSICAL JOURNAL
(2023)
Article
Chemistry, Applied
Ruifen Li, Morten Frendo Ebbesen, Zachary J. Glover, Tanja Christine Jaeger, Tijs A. M. Rovers, Birte Svensson, Jonathan R. Brewer, Adam Cohen Simonsen, Richard Ipsen, Anni Bygvra Hougaard
Summary: Super-resolution microscopy combined with quantitative image analysis and rheology was used to study acidified milk gels with different types of whey protein ingredients. The study showed that nano-particulated whey protein and whey protein concentrate were able to self-aggregate and attach to casein assemblies by inter-chain crosslinking. Micro-particulated whey protein did not interact with other proteins and scattered particles were visible in the mixed gels. The system containing only endogenous proteins showed the highest spatial colocalization of casein and whey protein fluorescence emission.
FOOD HYDROCOLLOIDS
(2023)
Review
Biotechnology & Applied Microbiology
J. L. Perez-Llorens, A. T. Critchley, M. L. Cornish, O. G. Mouritsen
Summary: The benefits of various seaweeds have long been recognized by humans, especially by coastal dwellers and those who use seaweeds as food and medicine. Their positive effects are likely due to the presence of hydrocolloids and bioactive compounds. This compilation of excerpts from major medical publications and esteemed writers provides a rich background supporting the positive applications of seaweeds for various human ailments.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Frederik Hegaard, Esben Thormann
Summary: In this study, the effects of composition, salt concentration, and ion specificity on the pH responsiveness of covalently crosslinked chitosan and alginate dialdehyde multilayer films were systematically investigated. The results showed that the swelling responses of the films varied with the multilayer composition, pH, and ion specificity, and were consistent with those observed for other types of polyelectrolyte films. Additionally, it was demonstrated that the pH responsiveness of the multilayer films strongly depended on the ionic condition under which the responses were measured.
Article
Clinical Neurology
Rasmus Holmboe Dahl, Rene Wugt Larsen, Esben Thormann, Goetz Benndorf
Summary: During endovascular therapy, backloading of polymer-coated microguidewires can cause damage to the coating, resulting in the formation of small polymer fragments. Therefore, it is recommended to minimize the use of backloaded polymer-coated microguidewires and opt for more stable hydrophilic coatings and less traumatic insertion tools.
CLINICAL NEURORADIOLOGY
(2023)
Article
Food Science & Technology
Ole G. Mouritsen
Summary: Roe refers to the eggs or whole gonads of fish, crustaceans, mollusks, and echinoderms. It is not only a source of nutrients for animals in the sea, but also a popular food among humans. From cod roe to caviar, roe is consumed in various forms and holds a rich gastronomic history. With its high omega-3 fatty acid content and unique taste, roe is valued for its nutrition and culinary uses. This article explores the diverse types of roe beyond sturgeon, such as flat fish, codfish, mullet, smelt, trout, herring, crab, shrimp, and octopus, as well as caviar substitutes made from fish meat and seaweeds. It argues for the sustainable and creative use of roe, including enhancing the umami flavor of vegetable and green dishes.
INTERNATIONAL JOURNAL OF GASTRONOMY AND FOOD SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Runtian Qie, Saeed Zajforoushan Moghaddam, Esben Thormann
Summary: Coacervation of poly(propylene oxide) and tannic acid, driven by hydrogen bonding, creates a tacky viscous material with strong underwater adhesion on various surfaces. By designing a two-component system, this adhesive can cure underwater through amine-epoxide reactions, providing both commercial competitiveness and waterproof bonding.
ACS APPLIED POLYMER MATERIALS
(2023)
Letter
Food Science & Technology
Ole G. Mouritsen
Article
Chemistry, Multidisciplinary
Junjie Kang, Saeed Zajforoushan Moghaddam, Esben Thormann
Summary: In this study, mussel-inspired chemistry was used to develop self-cross-linkable chitosan-alginate complexes. The addition of catechol groups enhanced the self-cross-linking property and cohesive properties of the complexes.
Article
Materials Science, Multidisciplinary
Junjie Kang, Saeed Zajforoushan Moghaddam, Rene Wugt Larsen, Esben Thormann
Summary: This study investigates the potential of combining epsilon-polylysine and tannic acid to develop bio-based adhesives with enhanced water resistance. The complexes formed at different pH values showed different adhesion strength and water resistance.
ACS APPLIED POLYMER MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Koosha Ehtiati, Johannes Eiler, Agnieszka Bochynska, Louis Lech Nissen, Esben Strobech, Lene Feldskov Nielsen, Esben Thormann
Summary: Skin electrical properties are important for recording biopotentials with electrophysiological sensors. Artificial skin models, which mimic the electrochemical properties of skin, are commonly used for testing sensor systems due to complications with testing on living tissues. This Review aims to provide a systematic understanding of the relation between skin structure and electrochemical behavior, as well as review artificial skin models and suggest future studies based on a comparison with real skin behavior.
ACS APPLIED BIO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Achebe N. O. Nzulumike, Esben Thormann
Summary: Medical devices inserted in blood vessels carry the risk of thrombosis, making surface properties crucial. Fibrinogen protein adsorption on biomaterial surfaces and subsequent polymerization into an insoluble fibrin clot is the key step in surface-induced coagulation. This study characterizes the thrombogenic properties of cardiovascular biomaterials and devices, identifying stainless steel and amorphous fluoropolymer as preferable options with low fibrinogen recruitment. Morphological analysis reveals fiber structures on metallic surfaces and fractal branched structures on polymeric surfaces. The study also explores fibrin adsorption on vascular guidewires and its correlation with uncoated guidewire morphology and raw stainless-steel biomaterials.
ACS APPLIED BIO MATERIALS
(2023)
Article
Chemistry, Physical
Achebe N. O. Nzulumike, Robert A. Biro, Esben Thormann
Summary: Biomaterial-associated thrombosis is a persistent challenge in medical device implantation, and antithrombogenic coatings are developed to prevent blood clot formation. Charged polymers show potential as coating materials, and we investigate these polymer coatings in the context of biomaterial-associated thrombosis. Our findings indicate that different polymer interfaces lead to different fibrin structures, with surface-induced fibrin formation dominating for anionic polymers and bulk-formed fibrin dominating for cationic polymers. Coatings containing zwitterionic sulfobetaine groups are identified as promising candidates for antithrombogenic biomaterials.
