Article
Chemistry, Physical
Chongyang Mai, Chengcheng Lv, Li Yang, Lielun Zhao, Yawen Guo, Yan Jiang, Hongwen Zhang
Summary: In this article, a raspberry-like particle-assisted breath figures method was introduced to fabricate superhydrophobic surfaces. SiO2 particles were generated on the surface of microspheres and then separated according to their structures. The superhydrophobic surface was prepared using the breath figures method. The adhesion of the surface could be transformed by changing the amount of microspheres added. The contact mode and the height to width ratio of the pores were also found to be key factors affecting the surface adhesion.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Hui-Ping Lin, Li-Jen Chen
Summary: The study demonstrates that a surface with certain roughness on single micro-scale structures can exhibit petal effect, where water drops can be pinned by infiltrating into spaces between micro-pillars. Experimental observations reveal the evolution of wetting behavior of water droplets on surfaces with varying roughness, including the Cassie-Wenzel transition during ACA measurement.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
William S. Y. Wong, Doris Vollmer
Summary: This study presents the concept of passive on-demand recovery of the plastron through a chemical reaction (effervescence), offering a new approach for intervention-free and immersion-durable superhydrophobic/superamphiphobic surfaces.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Khaloud Moosa Al Balushi, Khellil Sefiane, Daniel Orejon
Summary: This study investigates the effects of liquid surface tension and solid structure on the wetting and non-wetting behavior of droplets on solid substrates. The results show that the wetting behavior and droplet asymmetry are influenced by the liquid composition and structure spacing. A wetting regime map for a wide range of surface tension fluids and solid fractions is proposed.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
K. Maghsoudi, G. Momen, R. Jafari
Summary: We fabricated hierarchical superhydrophobic silicone rubber surfaces using a direct replication method. Surface roughness ratios and equilibrium contact angles were calculated, and the contribution of submicrostructures on wettability properties was considered. Comparison between theoretical predictions and experimental measurements showed good agreement, providing valuable insights for the design and fabrication of superhydrophobic surfaces.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Youhua Jiang, Zhijia Xu, Bin Li, Juan Li, Dongshi Guan
Summary: This study reveals that the receding contact angles of droplets decrease with the decrease in the pillar spring constant. Surprisingly, densely packed pillar arrays may result in larger receding contact angles than sparsely packed pillars, which is contrary to the understanding of rigid pillar arrays.
Article
Chemistry, Physical
Eunsang Lee, Florian Mueller-Plathe
Summary: The Cassie-Baxter state of wetting can explain the behavior of water droplets on superhydrophobic rough surfaces, including the equilibrium contact angle and the slippery dynamics. This study provides a deeper understanding of the contact line dynamics on rough surfaces using the molecular kinetic theory. The findings demonstrate the importance of additional friction forces and shed light on the origin of contact angle hysteresis.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jun Han Park, Bo Sung Shin, Ahmad Jabbarzadeh
Summary: Large-scale molecular dynamic simulations were conducted to study anisotropic wettability on one-dimensional nanopatterned surfaces with different intrinsic wettability and surface morphology. Results showed that anisotropic wettability strongly depends on intrinsic surface wettability and becomes more evident for oleophilic surfaces. Anisotropy was also found to be related to surface morphology and the degree of oleophilicity.
Article
Chemistry, Physical
Iara Patricia da Silva Ramos, Cristina Gavazzoni, Davi Lazzari, Carolina Brito
Summary: The relationship between wetting properties and geometric parameters of fractal surfaces is studied. A simple theoretical model is proposed to describe the wetting properties of a droplet on a hierarchical structured surface. Simulation results show that the auto-similarity level of the hierarchy does not significantly affect the stable wetting state of the droplet, but increases its contact angle. The study also reveals the existence of metastable states and the limited predictive power of fractal dimension in determining the contact angle.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Mohamadreza Beitollahpoor, Melika Farzam, Noshir S. Pesika
Summary: Dynamic friction measurements provide a more accurate characterization of the wetting properties of superhydrophobic surfaces compared to contact angle and sliding angle measurements. The force-based technique reduces standard deviations and provides higher accuracy in determining sliding angles and stability transitions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Bo Hou, Chunya Wu, Xiguang Li, Junjie Huang, Mingjun Chen
Summary: This study analyzed the forces and critical conditions on static sessile droplets deposited on hydrophobic micropillar-structured surfaces, proposing a new force-balance model which showed better agreement with experimental results compared to classical models. Integration of depinning mechanisms into the model allows for reliable estimations of critical conditions for the C-W transition during evaporation, providing appropriate geometric parameters for achieving high hydrophobic stability.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Paper & Wood
N. P. Klochko, V. A. Barbash, K. S. Klepikova, V. R. Kopach, O. V. Yashchenko, D. O. Zhadan, S. I. Petrushenko, S. V. Dukarov, V. M. Sukhov, A. L. Khrypunova
Summary: This study developed an inexpensive, biodegradable, and biocompatible material using nanocellulose to achieve rose petal-effect surfaces, which were further coated with CuI films to enhance hydrophobicity and water droplet adhesion. The hierarchical structures created by the CuI films on NCp and NCm surfaces demonstrated high water contact angles and wetting hysteresis, making them suitable for lab-on-a-chip microfluidic devices.
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
Engineering, Chemical
Donovan Chaffart, Luis A. Ricardez-Sandoval
Summary: This study develops a Moving Front kinetic Monte Carlo (MFkMC) algorithm to study the behaviour of droplets on pillared superhydrophobic surfaces (SHSs). The model captures the stochastic evolution of droplets on an SHS based on the balance of forces along the droplet interface length. The proposed SHS-MFkMC model incorporates novel features to accommodate for the geometry and physics of SHS-based droplet spreading.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Junxian Pei, Yutian Liao, Qian Li, Kui Shi, Jia Fu, Xuejiao Hu, Zhi Huang, Longjian Xue, Xu Xiao, Kang Liu
Summary: The study demonstrates that coating a layer of graphene on structured hydrophobic surfaces can achieve stable Cassie-state wetting, preventing wetting failure caused by trapped water in structure gaps. Graphene maintains the transparency of wettability and keeps moisture away from the gaps. The results provide an effective strategy to prevent Cassie-wetting failure and promote its further application in more complex conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Mark Frenkel, Alexander A. Fedorets, Leonid A. Dombrovsky, Michael Nosonovsky, Irina Legchenkova, Edward Bormashenko
Summary: Symmetry and orderliness of two-dimensional levitating microdroplet clusters were quantified using Voronoi entropy and continuous symmetry measure. The correlation between the two measures was investigated, with the maximum correlation found for clusters enabling the formation of hexagons. However, in certain cases, the maxima of symmetry and orderliness measures may not be well correlated.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Pritam Kumar Roy, Irina Legchenkova, Shraga Shoval, Edward Bormashenko
Summary: The study shows that interfacial crystallization occurs in Janus saline marbles, which is in line with the theory of heterogeneous nucleation. The energetic barrier of heterogeneous nucleation is smaller for the saline/carbon black hemisphere, leading to crystal formation. In the case of half-coated marbles, crystallization starts from the equatorial contact line separating the coated and naked hemispheres.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Edward Bormashenko
Summary: This study addresses minimal rotating thermodynamic systems and examines the conditions for recording and erasing information as well as the role of symmetry.
Article
Physics, Multidisciplinary
Edward Bormashenko
Summary: The study explores the temperature-dependent entropic force between a matrix of magnets and direct current, finding that the entropic force acts as repulsion at a large distance and scales with temperature.
Article
Chemistry, Multidisciplinary
Edward Bormashenko, Irina Legchenkova, Mark Frenkel, Nir Shvalb, Shraga Shoval
Summary: In this paper, informational (Shannon) measures of symmetry for patterns built of 1D and 2D shapes are introduced and analyzed. These measures characterize the uncertainty and appearance of symmetry elements in a pattern, are independent of pattern size and shape quantity, and are robust to long-range order. Additionally, the paper discusses the measures' applications in fractal patterns, mixed patterns, time evolution, and chemical reaction analysis.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Anfisa Ayalon, Alexander Rubowitz, Pritam Kumar Roy, Shraga Shoval, Irina Legchenkova, Edward Bormashenko
Summary: This paper focuses on the behavior, migration, and distribution of commonly injected ophthalmic drugs in eyes filled with medical-grade silicone oil. The results from in vitro and ex vivo models show that the drugs quickly sink in the silicone oil and spread over the retinal surface, suggesting their effective use in eyes with silicone oil tamponade.
SURFACE INNOVATIONS
(2022)
Review
Physics, Multidisciplinary
Irina Legchenkova, Mark Frenkel, Nir Shvalb, Shraga Shoval, Oleg V. Gendelman, Edward Bormashenko
Summary: This study reports the properties of Voronoi tessellations generated from random 2D distribution points. By applying an iterative procedure, order can be introduced into an initially disordered system. However, the Shannon entropy is not an accurate measure of the level of order in the patterns.
Article
Physics, Multidisciplinary
Edward Bormashenko, Irina Legchenkova, Mark Frenkel, Nir Shvalb, Shraga Shoval
Summary: We used a complete set of convex pentagons to achieve a plane filling without any overlaps or gaps using Voronoi tessellations. The Shannon entropy of the tessellations was calculated and it varied widely. We found that the most abundant Voronoi tessellations are made up of pentagons, hexagons, and heptagons, with pentagons and hexagons being the most common polygons.
Article
Chemistry, Physical
Anton Starostin, Vladimir Strelnikov, Leonid A. Dombrovsky, Shraga Shoval, Oleg Gendelman, Edward Bormashenko
Summary: The freezing of water droplets on bare and superhydrophobic surfaces of polymer wedges was investigated both experimentally and computationally. Numerical calculations revealed that the direction of heat flux from the droplet through the thermal contact region with the wedge differs significantly from the normal to the wedge surface. A new computational model was proposed to account for the variable area of the water freezing front in the droplet, which accurately predicted the faster freezing on bare surface. The experimental results showed that the direction of the freezing cone axis was noticeably different for bare and superhydrophobic wedge surfaces due to the influence of the local heat flux direction.
SURFACE INNOVATIONS
(2023)
Article
Multidisciplinary Sciences
Mark Frenkel, Irina Legchenkova, Nir Shvalb, Shraga Shoval, Edward Bormashenko
Summary: This study reports on Voronoi mosaics inspired by seed points placed on the Archimedes Spirals. Voronoi (Shannon) entropy was calculated for these patterns. Equidistant and non-equidistant patterns were examined. The Voronoi tessellations generated by the seeds located on the Archimedes spiral demonstrated a switch in their chirality with linearly growing radial distance. The study also discusses the aesthetic attraction of the Voronoi mosaics arising from seed points placed on the Archimedes Spirals.
Article
Mathematics
Nir Shvalb, Mark Frenkel, Shraga Shoval, Edward Bormashenko
Summary: In this paper, we use the Ramsey theory to study the geometrical characteristics of closed contours. By examining a set of six points arranged on a closed contour and connected as a complete graph, we find that the curve must contain at least one monochromatic triangle. This finding has practical applications in dynamical billiards. We also discuss Ramsey constructions arising from differential geometry and the applications of the Ramsey theory.
Article
Physics, Multidisciplinary
Mark Frenkel, Shraga Shoval, Edward Bormashenko
Summary: This paper introduces and calculates Shannon entropy for bi-colored Ramsey complete graphs, with up to six vertices. The graphs considered are complete graphs with two types of links, alpha-links and beta-links. The Shannon entropy is introduced to describe the uncertainty of monochromatic polygons in the given complete graph, and it is insensitive to the exact shape of the polygons but sensitive to their distribution. The suggested Shannon entropies, S alpha and S beta, are interpreted as the average uncertainty of finding specific colored polygons in the graph.
Article
Chemistry, Multidisciplinary
Abhishek Kaushal, Shraga Shoval, Bernard P. Binks, Edward Bormashenko
Summary: The impact of liquid marbles coated with different hydrophobic powders on various solid substrates was investigated. The contact time of the bouncing marbles was studied and a scaling behavior of the contact time as a function of Weber number was established. The spreading time and retraction time of the marbles were found to be weakly dependent on the Weber number. The scaling law changed at a threshold Weber number, which was attributed to the breaking of the Leidenfrost regime.
Article
Chemistry, Physical
Pritam Kumar Roy, Shraga Shoval, Nir Shvalb, Leonid A. Dombrovsky, Oleg Gendelman, Edward Bormashenko
Summary: In this paper, the deformation of a paraffin wax droplet during solidification is studied through experiments and numerical simulations. It is found that the droplet's upper surface becomes nearly flat and a dimple is formed in the center, resembling the shape of a fruit. The formation of the dimple is attributed to the presence of the mushy zone between the liquidus and solidus of the paraffin wax. These findings contribute to a better understanding of the deformation mechanism of paraffin wax droplets.
Article
Physics, Fluids & Plasmas
Mark Frenkel, Alexander A. Fedorets, Dmitry V. Shcherbakov, Leonid A. Dombrovsky, Michael Nosonovsky, Edward Bormashenko
Summary: In this study, scaling laws for polymer chains in two-dimensional levitating microdroplet clusters were examined. The results confirmed the predicted power exponent for 2D polymer chains and demonstrated the applicability of the Kramers theorem for branched droplet chains.
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
