Article
Chemistry, Applied
Katarzyna Majerczak, Joseph R. H. Manning, Zhiwei Shi, Zhanping Zhang, Zhenyu Jason Zhang
Summary: The wetting kinetics of PVA-based films were studied using various techniques. The evolution of contact angle was influenced by film composition, preparation method, plasticiser content, and relative humidity. Films with partially hydrolysed polymer showed less susceptibility to dissolution compared to fully hydrolysed counterparts. Incorporation of glycerol as a plasticiser resulted in faster wetting kinetics. Additionally, aging of PVA-based films had minimal effect, except at 100% RH.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Physical
C. A. Papakonstantinou, H. Chen, V Bertola, A. Amirfazli
Summary: The study found through experiments that the contact angle between water and different surfaces decreases over time in a condensation environment, due to the evaporation of condensed drops forming a thin film and adsorption of water vapor causing the contact angle to decrease. The change in contact angle over time has a significant impact on the shedding of droplets in drop-wise condensation processes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Construction & Building Technology
Jiayun Xu, Biao Ma, Shulin Zhou, Weijie Mao, Xiaoqing Wang
Summary: Based on the Wenzel model and Cassie model, this paper established a new wetting model for irregular rough surfaces and calculated the wetting depth and apparent contact angle. The experimental results showed significant differences in the surface texture parameters of different aggregates. The relative error between the predicted and measured contact angles was less than 15%, indicating excellent prediction effect. The wetting model analysis revealed that the surface tension of the test liquid, lithology of the solid aggregate, surface roughness, and texture structure are important control parameters affecting wetting.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
P. Xu, J. R. Bai, P. Zhou, L. L. Wang, X. N. Sun, L. Wei, Q. F. Zhou
Summary: A physical model was proposed to investigate the wettability of various microtextured surfaces, particularly superhydrophobicity. It was found that the sidewall angle restricted the contact angle of the microstructures, and re-entrant structures played a crucial role in the transition from hydrophilicity to superhydrophobicity.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Matti J. Hokkanen, Matilda Backholm, Maja Vuckovac, Quan Zhou, Robin H. A. Ras
Summary: Superhydrophobic coatings with unique properties such as self-cleaning and staying dry have recently emerged in industrial and consumer markets. The stochastic nature of coating components can affect the uniformity of water repellency, and traditional contact angle goniometry may not provide accurate quantification of wetting properties. The study demonstrates that highly sensitive force-based methods can offer advantages in quantifying microscale heterogeneity in superhydrophobic coatings.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
G. C. Savulescu, M. Rucker, A. Scanziani, R. Pini, A. Georgiadis, P. F. Luckham
Summary: This study investigates the potential of using atomic force microscopy to characterize wetting behavior at the nanoscale, successfully observing an attraction phenomenon on the water droplet surface in experiments and obtaining parameters such as contact angle and contact angle distribution.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Ai Chun-ming, Sun Ping-ping, Wu Ai-xiang, Chen Xun, Liu Chao
Summary: This study investigates the potential effect of surfactant on improving the surface wettability of copper ore through experimental and numerical analysis. The results show that the concentration of surfactant and sulfuric acid solution play a significant role in enhancing the wettability of the ore. Liquid surface tension and ore surface roughness are identified as the key factors affecting the surface wettability.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Chemistry, Physical
T. D. Blake, J-C Fernandez-Toledano, J. De Coninck
Summary: The maximum velocity of dewetting is found to encode sufficient information about the hydrodynamics of the wetting process to determine the local dynamic contact angle at the molecular scale. A model combining molecular-kinetic theory of dynamic wetting and hydrodynamic model is used to determine the value of the logarithmic parameter and the relative significance of different channels of dissipation. The proposed iterative procedure shows promising results when compared with molecular dynamics simulations and experimental studies.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yangyang Wu, Konstantinos Lazaridis, Mikhail D. Krivilyov, Sinisa Dj. Mesarovic, Dusan P. Sekulic
Summary: Understanding the effect of gravity on the capillary flow of molten metal is crucial for repair and construction in space through brazing. Our experiments demonstrate the formation of a secondary liquid flux meniscus in contact between liquid Al-Si and an alumina substrate. The equilibrium contact angle is close to 180 degrees, while the apparent contact angle depends on the brazing liquid mass. Additionally, the surface profile of the molten braze alloy on inclined AA3003 changes from a non-symmetric shape to a more symmetric shape as the inclination angle decreases.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Review
Chemistry, Physical
Xiao Wang, Cheng Fu, Chunlai Zhang, Zhengyao Qiu, Bo Wang
Summary: Superhydrophobic surfaces have been widely used in research and industry due to their self-cleaning, waterproof, and low-adhesion qualities. This review focuses on the stability of the superhydrophobic state, the role of heterogeneous microstructures in determining contact angle and wetting transition mechanisms. Various models and testing strategies are discussed, with an emphasis on future research priorities.
Article
Materials Science, Multidisciplinary
Bingbing Yin, Miao Sun, Wang Zhu, Li Yang, Yichun Zhou
Summary: A novel device was developed to evaluate the wetting performance of molten CMAS on thermal barrier coatings, revealing that spreading distance decreases and contact angle increases on rough surfaces. The study also found that the contact angle is proportional to the square of surface roughness at the stable stage, and wettability is determined by viscosity, temperature, and reactive production of CMAS and coatings.
RESULTS IN PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Emil Korczeniewski, Pawel Bryk, Stanislaw Koter, Piotr Kowalczyk, Wojciech Kujawski, Joanna Kujawa, Artur P. Terzyk
Summary: This study investigated the wetting properties of high purity (111) copper surface, showing the relationship between surface roughness and water contact angle. It was found that surface characteristics of copper affected water droplet evaporation and freezing process. Additionally, the presence of surface hydrocarbons on copper was shown to strongly influence the wetting behavior.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Paolo Canepa, Claudio Canale, Ornella Cavalleri, Giovanni Marletta, Grazia M. L. Messina, Massimo Messori, Rubina Novelli, Simone Luca Mattioli, Lucia Apparente, Nicola Detta, Tiziana Romeo, Marcello Allegretti
Summary: A multi-technique approach was used to study the interaction of rhNGF with different pharma grade polymeric materials. It was found that copolymers showed lower crystallinity and roughness, as well as higher contact angle values compared to PP homopolymers, indicating a lower surface wettability for the protein. Thus, copolymers may offer an advantage in terms of protein interaction/adsorption. Additionally, protein adsorption was found to be a self-limiting process that passivates the surface after the deposition of roughly one molecular layer.
Article
Construction & Building Technology
Yan Meng, Jian Ouyang, Jinping Ou
Summary: This study investigates the wetting behavior of asphalt emulsion on aggregate by analyzing the dynamic contact angle. Quantitative indicators for evaluating the wetting behavior are proposed, and factors such as emulsifier dosage, asphalt dosage, wetting agent dosage, aggregate type, and surface roughness are analyzed. The primary factor affecting the wetting behavior is identified using the grey correlation method. The findings suggest that the wetting process of asphalt emulsion on the aggregate surface can be divided into two stages, and the equilibrium contact angle and wetting velocity are recommended as quantitative indicators.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Sarah Marie Loesslein, Frank Mucklich, Philipp G. Gruetzmacher
Summary: The wetting characterization and production of engineered surfaces with distinct contact angles or spreading behavior have significant importance in various industrial and scientific applications. The wetting behavior and droplet spreading on anisotropic surface patterns are highly dependent on both surface topography and chemistry. The study demonstrated that the combination of surface chemistry and directional patterns can result in anisotropic wetting behavior.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Charlie Gilbert, Tzu-Chieh Tang, Wolfgang Ott, Brandon A. Dorr, William M. Shaw, George L. Sun, Timothy K. Lu, Tom Ellis
Summary: A symbiotic culture of bacteria and yeast is utilized to create bacterial cellulose-based living materials that can respond to external stimuli and adjust their structural and functional properties, with potential implications for biosensing and biocatalysis applications.
Review
Nanoscience & Nanotechnology
Tzu-Chieh Tang, Bolin An, Yuanyuan Huang, Sangita Vasikaran, Yanyi Wang, Xiaoyu Jiang, Timothy K. Lu, Chao Zhong
Summary: Synthetic biology utilizes genetic tools to engineer living cells and organisms, similar to machine programming; materials synthetic biology integrates principles from synthetic biology and materials science to redesign living systems into dynamic and responsive materials.
NATURE REVIEWS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ahmed E. Salih, Mohamed Elsherif, Fahad Alam, Matteo Chiesa, Haider Butt
Summary: In this study, gold nanoparticles (GNPs) were functionalized with 3-mercaptopropionic acid (GNPs-MPA) and doped into hydrogel materials using the breathing-in/breathing-out (BI-BO) method. The pH-responsive optical and colorimetric properties of the GNPs-MPA solutions and gels were investigated through UV-Vis spectroscopy and microscopy. The results showed that the color of the solutions and gels changed from red to indigo with a decrease in pH, indicating their potential as pH-triggered sensors.
Article
Physics, Applied
Tuza Olukan, Jekaterina Sydorenko, Atanas Katerski, Mariam Al Mahri, Chia-Yun Lai, Abdulrahman Al-Hagri, Sergio Santos, Matteo Chiesa
Summary: The synthesis of TiO2 thin films using chemical spray pyrolysis method with different ratios of titanium isopropoxide (TTIP) to acetylacetone (AcacH) has demonstrated the highest photodegradation at a ratio of 1:8. These films show promise in indoor pollution treatment. The incorporation of carbon into the surface and TiO2 lattice may contribute to the observed performance, but the mechanism is still unclear. Here, the correlation between contact potential difference (CPD) contrast maps and functionality dependence on the TTIP to AcacH ratio is reported, suggesting a faster transfer of charge carriers to the surface.
APPLIED PHYSICS LETTERS
(2022)
Article
Energy & Fuels
Mohammed Bin Afif, Abdulla Bin Afif, Harry Apostoleris, Krishiv Gandhi, Anup Dadlani, Amal Al Ghaferi, Jan Torgersen, Matteo Chiesa
Summary: The rapidly declining costs of renewable energy technologies have made solar and wind the cheapest sources of energy in many parts of the world. This not only enables the rapid decarbonization of the electricity sector but also reduces the costs of energy-intensive decarbonization efforts in other areas.
Review
Chemistry, Multidisciplinary
Bolin An, Yanyi Wang, Yuanyuan Huang, Xinyu Wang, Yuzhu Liu, Dongmin Xun, George M. Church, Zhuojun Dai, Xiao Yi, Tzu-Chieh Tang, Chao Zhong
Summary: Engineered living materials (ELMs) are a new form of materials composed of living matter or cell communities embedded in self-regenerating matrices or artificial scaffolds. Similar to natural materials like bone and skin, ELMs possess the functional capabilities of living organisms, including the ability to grow, self-organize, self-repair, and perform programmed biological functions upon sensing external cues. ELMs show promise in areas such as green energy production, bioremediation, disease treatment, and fabricating advanced smart materials.
Article
Engineering, Electrical & Electronic
Srinivasa Reddy Tamalampudi, Ghada Dushaq, Nitul S. Rajput, Matteo Chiesa, Mahmoud S. Rasras
Summary: In this study, 50 nm thick amorphous indium telluride films were fabricated using RF sputtering technique on a silicon substrate. These films were then used to create back-gated field-effect photodetectors. The detectors exhibited a broad wavelength response, high photo responsivity, and good frequency response. They also showed excellent stability under ambient conditions.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Psychology, Biological
Fengyuan Liu, Petter Holme, Matteo Chiesa, Bedoor AlShebli, Talal Rahwan
Summary: Using algorithmic tools, researchers found pervasive gender inequalities among academic editors, with only 8% of editors-in-chief being women. Men editors were more likely to self-publish in the journal they edit. Career length explains the gender gap among editors, but not editors-in-chief.
NATURE HUMAN BEHAVIOUR
(2023)
Article
Engineering, Biomedical
Heechul Park, Alan F. Schwartzman, Tzu-Chieh Tang, Lei Wang, Timothy K. Lu
Summary: Natural materials like bone, wood, and bamboo can inspire the creation of stiff and lightweight structural materials. Biofilms, one of nature's most dominant life forms, have been found to possess physical properties suitable for structural materials. In this study, an Escherichia coli biofilm with a Young's modulus close to 10 GPa and ultra-low density was discovered, suggesting its potential as a high-performance structural material. By engineering E. coli, carbon nanotubes were incorporated into the biofilm, increasing its stiffness to over 30 GPa, and the biofilm was also able to detect heavy metals as environmental toxins. These findings open up new possibilities for developing responsive living structural materials for various real-world applications.
MATERIALS TODAY BIO
(2023)
Article
Physics, Applied
Sergio Santos, Karim Gadelrab, Tuza Olukan, Josep Font, Victor Barcons, Matteo Chiesa
Summary: Quantifying conservative forces in multifrequency atomic force microscopy involves solving the general equations expressed in terms of interaction energies. Power law expressions are commonly used for electrostatic, ferroelectric, magnetic, or long range forces. This study discusses long range forces modeled using power laws with exponent values ranging from 2-5, and applies multifrequency theory to explore the relevant parameter space. Numerical integration of motion equations shows a narrow range of operational parameters for valid approximations during imaging, with errors as low as 10% for all explored exponents.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Sergio Santos, Karim Gadelrab, Lamiaa Elsherbiny, Xaver Drexler, Tuza Olukan, Josep Font, Victor Barcons, Matteo Chiesa
Summary: The multifrequency formalism is generalized and exploited in bimodal and trimodal atomic force microscopy (AFM) to quantify van der Waals interactions with small forces. The use of higher modes in the multifrequency force spectroscopy formalism, including trimodal AFM, improves material property quantification compared to bimodal AFM. Bimodal AFM with the second mode is valid when the drive amplitude of the first mode is significantly larger. The present approach allows for robust quantification of weak long range forces and extends the available channels for high resolution.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Engineering, Biomedical
Charles Jo, Jing Zhang, Jenny M. Tam, George M. Church, Ahmad S. Khalil, Daniel Segre, Tzu-Chieh Tang
Summary: Filamentous fungi play a crucial role in carbon and nutrient cycling in ecosystems and have industrial potential in areas such as enzyme and bioactive compound production, decarbonization, and environmental remediation. However, they have not yet been extensively studied or applied in synthetic biology compared to other cell factories. In this review, the authors summarize the use of synthetic biology and computational tools to optimize filamentous fungi as a bioproduction chassis, addressing key challenges such as slow growth rate and low production yields.
MATERIALS TODAY BIO
(2023)
Article
Engineering, Biomedical
Isabella M. Goodchild-Michelman, George M. Church, Max G. Schubert, Tzu-Chieh Tang
Summary: Cyanobacteria are promising for developing carbon neutral and carbon negative technologies due to their efficient photosynthesis and easy genetic manipulation. Although researchers have demonstrated their ability to produce sustainable biomaterials, industrial application is still in its early stages.
MATERIALS TODAY BIO
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Odin Foldvik Eikeland, Filippo Maria Bianchi, Inga Setsa Holmstrand, Sigurd Bakkejord, Matteo Chiesa
Summary: In this study, we focused on a power grid in the Arctic region of Northern Norway to detect power disturbances and identify significant variables using machine learning techniques. The results showed that linear models achieved the highest performance in fault detection, with flicker amount and gust wind speed being identified as important factors in explaining the disturbances.
INTELLIGENT TECHNOLOGIES AND APPLICATIONS
(2022)
Review
Green & Sustainable Science & Technology
Hannah Schweitzer, Nerea J. Aalto, Wolfgang Busch, Dennis Tin Chat Chan, Matteo Chiesa, Edel O. Elvevoll, Robin Gerlach, Kirsten Krause, Karel Mocaer, James J. Moran, Joseph P. Noel, Shalaka Kiran Patil, Yannick Schwab, Rene H. Wijffels, Angela Wulff, Lise Ovreas, Hans C. Bernstein
Summary: The article discusses next-generation biotechnologies inspired by ecological processes to achieve carbon capture, sequestration, and utilization, focusing on identifying and utilizing control points for CO2 and CH4 to drive innovation in carbon capture technologies.
