Article
Physics, Fluids & Plasmas
Abhishek K. Singh, Anupam Choubey, Rajiv K. Srivastava, Supreet Singh Bahga
Summary: Electrohydrodynamic (EHD) jet printing involves the deposition of a liquid jet issued from a stretched needle under a strong electric field. Unlike the classical cone-jet observed at low flow rates and high electric fields, moderately stretched EHD jets exhibit different jetting characteristics. In this study, we describe the physics of moderately stretched EHD jets through numerical simulations and experiments, and show that our simulations accurately predict the jet shape for varying flow rates and applied potential difference. The findings provide insights for better control of the EHD jet printing process.
Article
Chemistry, Multidisciplinary
Roi Bar-On, Ofer Manor
Summary: In this study, we use classical density functional theory to investigate the contributions of colloidal forces (hydrophobic, van der Waals, and electrical double layer interactions) to the thickness of a colloidal deposit in equilibrium with an aqueous suspension. We propose a Ginzburg-Landau type energy functional by expanding the density functional theory, treating colloidal particles as clusters of molecular segments, similar to polymer statistical physics and the classic Hamaker treatment. Our approach considers the integral interaction energy between colloidal particles, which can be much larger than the characteristic molecular thermal energy kBT. This analysis emphasizes the importance of solvent molecules in determining entropy and provides physical values to the statistical coefficients in the Ginzburg-Landau type energy functional.
Article
Materials Science, Multidisciplinary
Jaehyun Lee, Ehsan Esmaili, Giho Kang, Baekhoon Seong, Hosung Kang, Jihoon Kim, Sunghwan Jung, Hyunggun Kim, Doyoung Byun
Summary: This study investigated the mechanism for the suppression of dimples by electric stress, which deforms the droplet's bottom interface to a conical shape. The electric pressure was found to be at least 108 times bigger than the air pressure at the center of coalescence, providing insight into the effect of electric stress on droplet coalescence and its application in solution-based techniques like printing and coating.
Article
Mechanics
Shubham Agrawal, Gargi Khurana, Purbarun Dhar
Summary: Experiments and theoretical investigations have shown that inertial forces dominate over surface forces in droplet impacts on V-shaped valleys or grooves with higher impact Weber numbers, while the wetting properties of the substrate play a significant role in impacts with lower Weber numbers.
Article
Agronomy
Feixiang Yuan, Chenchen Gu, Kechuan Yi, Hanjie Dou, Si Li, Shuo Yang, Wei Zou, Changyuan Zhai
Summary: This study investigated the impact of spray pressure on droplet atomization characteristics during variable-rate spraying in orchards. A mathematical model was established through experimental and regression analysis. The results showed that longitudinal distance, transverse distance, and spray pressure had a significant influence on droplet size and velocity. This study provides agricultural references for predicting droplet characteristics at different spatial positions.
Article
Crystallography
Yanpu Chao, Hao Yi, Fulai Cao, Yaohui Li, Hui Cen, Shuai Lu
Summary: A novel high-resolution micro-scale 3D printing method using high-voltage electric field-driven jet deposition technology was proposed to fabricate wax micro-structures. The effects of various process parameters on the printing process were investigated, resulting in the successful fabrication of micro-scale wax structures with controlled size deviation. This research demonstrates the feasibility of using high-voltage electric field-driven jet deposition technology for micro-scale wax structure fabrication.
Article
Mathematics, Applied
Nathan Hayford, Fudong Wang
Summary: The study provides an in-depth analysis of a 1-parameter family of electrified droplets and investigates a technique for searching for new solutions to the droplet equation. By applying this technique, a 1-parameter family of physical droplets was rederived, with speculations on extensions to droplets with multiple connected components.
COMPUTATIONAL METHODS AND FUNCTION THEORY
(2022)
Article
Chemistry, Multidisciplinary
Rui-Feng Guo, Li Zhang, Dong-Ming Mo, Chun-Mei Wu, You-Rong Li
Summary: In the process of water evaporation in its own pure vapor at low pressures, the interface temperature on the vapor side is higher than that on the liquid side, and there is a temperature discontinuity across the interface. The magnitude of the temperature discontinuity is strongly affected by the vapor pressure. Additionally, a uniform temperature layer is formed below the evaporating interface due to the coupling effect of evaporation cooling and thermocapillary convection, which mainly transfers the energy required for evaporation.
Article
Materials Science, Multidisciplinary
Xingshuang Zhang, Lei Xie, Xungai Wang, Zhengzhong Shao, Biao Kong
Summary: This article summarizes different methods for electrospinning ultrathin fibers and introduces the development of multi-Taylor cone electrospinning, pointing out that it can increase production efficiency and achieve large-scale industrial production.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Analytical
Ravleen Kaur Kohli, Gary J. Van Berkel, James F. Davies
Summary: Studies have shown that PS ionization can track the chemical evolution of levitated particles, but requires the use of an internal standard to correct variability. The OPSI method, combining electrospray and particle levitation technologies, offers more advantages and demonstrates stability in long-term measurements.
ANALYTICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Alessandra Serva, Mathieu Salanne, Martina Havenith, Simone Pezzotti
Summary: Hydrophobic hydration at the metal/water interface is studied using constant applied potential molecular dynamics in this work. The study proposes an adaptation of the Lum-Chandler-Weeks theory to describe the free energy of hydrophobic hydration at the interface, showing a preference for outer-sphere adsorption of small hydrophobic solutes at the gold surface and higher free energy cost for hydrating larger hydrophobes at the interface compared to the bulk.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Thermodynamics
Marco Tancon, Riccardo Parin, Stefano Bortolin, Alessandro Martucci, Davide Del Col
Summary: Dropwise condensation is a complex phenomenon involving droplet nucleation, coalescence and motion. Limited studies have investigated the effect of vapor velocity on heat transfer coefficient and droplet departing radius during DWC.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Review
Chemistry, Multidisciplinary
Bhavana Joshi, Edmund Samuel, Yong-il Kim, Alexander L. Yarin, Mark T. Swihart, Sam S. Yoon
Summary: The electrostatic spray method is a promising nonvacuum technique for efficient deposition of thin films from solutions or dispersions, offering versatility in morphological engineering of nanostructured films. Current advances in electrostatic spraying can produce exceptional morphologies, notably useful in enhancing performance in electrochemical applications. Interesting morphologies of metal oxides and their composites produced by electrostatic spraying highlight enhanced energy conversion and storage performance.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Biochemical Research Methods
Jeremie Gouyon, Ariane Boudier, Arnaud Pallotta, Celia Boukoufi, Igor Clarot
Summary: Taylor dispersion analysis (TDA) is a technique for determining the molecular diffusion coefficient of species by analyzing the band broadening of analytes in laminar flow. This study introduces a new method called cross-frontal mode, which combines two crossed sample fronts to accurately determine the diffusion coefficient of various substances. The cross-frontal mode shows good correlation with the usual frontal mode, and offers improved sensitivity and alternative mathematical treatment compared to regular TDA modes.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Physics, Condensed Matter
Amanda J. Carr, Sang Soo Lee, Ahmet Uysal
Summary: In this paper, the electrical double layer (EDL) formed near graphene in dilute aqueous YCl3 solution is characterized using in situ high resolution x-ray reflectivity and resonant anomalous x-ray reflectivity techniques. The study reveals that yttrium ions (Y3+) readily adsorb to the negatively charged graphene surface to form an ion profile, and a molecular-scale gap is observed in the adsorbed Y3+ profile. Controlled adsorption and increasing cation coverage with increasing negative potential are also demonstrated. This experimental description provides important insights into the application of graphene-based systems for enhanced and selective ion separations.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Mechanics
B. Vajdi Hokmabad, S. Ghaemi
Article
Thermodynamics
Jianfeng Hou, Babak Vajdi Hokmabad, Sina Ghaemi
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2017)
Article
Thermodynamics
S. Faraji, B. Sadri, B. Vajdi Hokmabad, N. Jadidoleslam, E. Esmaeilzadeh
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2017)
Article
Physics, Condensed Matter
Chenyu Jin, Babak V. Hokmabad, Kyle A. Baldwin, Corinna C. Maass
JOURNAL OF PHYSICS-CONDENSED MATTER
(2018)
Article
Acoustics
Zayed Almansoori, Behnam Khorshidi, Behnam Sadri, Mohtada Sadrzadeh
ULTRASONICS SONOCHEMISTRY
(2018)
Article
Mechanics
B. Vajdi Hokmabad, S. Faraji, T. Ghaznavi Dizajyekan, B. Sadri, E. Esmaeilzadeh
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2014)
Article
Multidisciplinary Sciences
Babak Vajdi Hokmabad, Sina Ghaemi
SCIENTIFIC REPORTS
(2017)
Article
Physics, Multidisciplinary
Babak Vajdi Hokmabad, Kyle A. Baldwin, Carsten Krueger, Christian Bahr, Corinna C. Maass
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Babak Vajdi Hokmabad, Ranabir Dey, Maziyar Jalaal, Devaditya Mohanty, Madina Almukambetova, Kyle A. Baldwin, Detlef Lohse, Corinna C. Maass
Summary: This research demonstrates that autophoretic droplet swimmers can transition from quasiballistic to bimodal chaotic propulsion by controlling the viscosity of the environment. The physical mechanism behind this transition involves the droplet recurrently switching between two dominant modes due to interactions with self-generated chemical gradients, promoting self-avoiding walks.
Article
Multidisciplinary Sciences
Babak Vajdi Hokmabad, Jaime Agudo-Canalejo, Suropriya Saha, Ramin Golestanian, Corinna C. Maass
Summary: Communication through chemical signaling is a common feature in biological self-organization. In this study, self-propelling droplets are used as a model to investigate how chemically active particles modify their environment and communicate with each other. The findings show how this communication mechanism leads to a transient dynamical arrest in active emulsions and provide insights into the navigation strategy shaped by negative autochemotaxis.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Ranabir Dey, Carola M. Buness, Babak Vajdi Hokmabad, Chenyu Jin, Corinna C. Maass
Summary: Researchers demonstrate the regular, controllable, and reproducible oscillatory rheotaxis in artificial microswimmers. The oscillatory rheotaxis of a self-propelling droplet in a microchannel is primarily governed by shear flow characteristics and the interaction of the finite-sized microswimmer with microchannel walls. These findings provide a realistic understanding of the behavior of active particles in confined microflows, which is relevant in many biotechnology applications.
NATURE COMMUNICATIONS
(2022)
Article
Mechanics
Prashanth Ramesh, Babak Vajdi Hokmabad, Dmitri O. Pushkin, Arnold J. T. M. Mathijssen, Corinna C. Maass
Summary: Active emulsions can form self-propelled droplets or phoretic micropumps. They interact with their self-generated chemical fields, leading to emergent chemodynamic phenomena and multistable interfacial flows. By measuring flow and chemical concentration fields, we observe migration of vortices, bistability between different flows, and transition to multipolar modes in active micropumps. These dynamics are controlled by the saturation of the surface due to local build-up of chemical products.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Chemistry, Physical
Babak Vajdi Hokmabad, Akinori Nishide, Prashanth Ramesh, Carsten Krueger, Corinna C. Maass
Summary: We report on the emergence of spontaneously rotating clusters in active emulsions. The self-propelling droplets sediment and self-organise into planar, hexagonally ordered clusters that rotate around the plane normal. This effect is observed for both symmetric and asymmetric arrangements of isotropic droplets, ruling out geometric asymmetry as a cause. Individual droplets exhibit a helical swimming mode in a small range of intermediate activity, and by forming an ordered cluster, they suppress chaotic dynamics and achieve a steady rotational state. The stable collective rotation in the cluster is proposed to be caused by cooperative coupling between the rotational modes of individual droplets.
Article
Chemistry, Physical
Behnam Sadri, David Pernitsky, Mohtada Sadrzadeh
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2017)
Article
Chemistry, Physical
Panpan Zhang, Xu Wang, Yangyang Yang, Haifeng Yang, Chunsheng Lu, Mingru Su, Yu Zhou, Aichun Dou, Xiaowei Li, Xiaochuan Hou, Yunjian Liu
Summary: In this study, the influence of transition metal doping on the electronic and mechanical properties and electrochemical performance of 2HMoS2/NC was investigated using Cobalt (Co) as an example. Co doping was found to effectively improve the electronic conductivity and active site areas of 2H-MoS2/NC at different positions, optimizing the adsorption and diffusion capability of potassium ions. Furthermore, the study revealed the optimal roles of different types of nitrogen atoms in kinetic adsorption, diffusion, and interfacial stability of potassium ions. These findings provide guidance for the experimental design of high rate 2H-MoS2/NC electrode materials and the optimal design of other functional composite materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zeeshan Ajmal, Mahmood Ul Haq, Shahid Zaman, M. K. Al-Muhanna, Anuj Kumar, Mohammed M. Fadhali, Siwar Ben Hadj Hassine, Muhammas Qasim, K. F. Alshammari, Ghulam Abbas Ashraf, Abdul Qadeer, Adil Murtaza, Sulaiman Al-Sulaimi, Huaqiang Zeng
Summary: This study presents a novel heterojunction structure (SrTiO3/CN-TAL10.0) for enhanced photocatalytic water splitting (PWS). The incorporation of thiophenedicarboxaldehyde (TAL) through copolymerization significantly improves the photocatalytic activity of carbon nitride (CN) while maintaining its photostability performance. The optimized composition allows efficient isolation of photoinduced charge carriers and enhanced charge transport, resulting in a remarkable increase in overall photocatalytic efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Angela Arnosa-Prieto, Patricia Diaz-Rodriguez, Manuel A. Gonzalez-Gomez, Pelayo Garcia-Acevedo, Lisandra de Castro-Alves, Yolanda Pineiro, Jose Rivas
Summary: Macrophages can exhibit different phenotypes depending on the microenvironment and the characteristics of magnetic iron oxide nanoparticles (MNPs). This study demonstrates that the concentration and morphology of MNPs can influence the polarization of macrophages. The findings have implications for therapeutics targeting tissue regeneration and tumor progression.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yu Fang, Cheng-Ye Zhu, Hao-Cheng Yang, Chao Zhang, Zhi-Kang Xu
Summary: This study demonstrates the advantages of vacuum-assisted interfacial polymerization (VAIP) in fabricating polyimide nanofiltration membranes. By using vacuum filtration, aqueous solutions of PIP can be evenly distributed on different microfiltration substrates, leading to the fabrication of uniform and ultra-thin polyamide layers with excellent performance. The membranes exhibit high rejection rates and water permeance, as well as satisfactory long-term stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Isaac J. Gresham, Edwin C. Johnson, Hayden Robertson, Joshua D. Willott, Grant B. Webber, Erica J. Wanless, Andrew R. J. Nelson, Stuart W. Prescott
Summary: Understanding the interactions between polymers and surfactants is crucial for optimizing commercial systems. This study tested the behavior of polymer-surfactant systems, revealing that they do not behave like polyelectrolytes in the presence of salt. Additionally, the structure of polymer-surfactant complexes under confinement differs from that of polyelectrolytes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yunxiao Xie, Cui Liu, Jie Zhang, Yan Li, Bin Li, Shilin Liu
Summary: This study aimed to improve the microstructure and rheological properties of W/W Pickering emulsions by crosslinking sodium alginate at the water-water interface, thereby enhancing the activity of encapsulated probiotics in simulated gastrointestinal digestion.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Sang Ho Lee, Yige Sun, Patrick S. Grant
Summary: This research developed an effective approach to enhance the charging rates of lithium ion batteries (LIBs) by strategically incorporating carbon nanotube (CNT) conductivity boosters into Li4Ti5O12 (LTO) electrodes. Multi-layer architectures comprising CNT-rich and CNT-free LTO electrode layers were manufactured using a layer-by-layer spray coating method to promote charge transfer kinetics of high mass loading electrodes. The best performing multi-layer was paired with a spray-coated LiFePO4 (LFP) positive electrode, resulting in attractive power performance that outperformed conventional LTO || LFP combinations.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jingwei Liang, Shaobin Li, Fengbo Li, Li Zhang, Yufeng Jiang, Huiyuan Ma, Kun Cheng, Liang Qing
Summary: A molybdenum-regulated self-supporting electrode material with rich vacancy defects has been successfully synthesized and shows exceptional catalytic activities and stability for electrocatalytic overall water splitting. This study provides a new perspective for the design and synthesis of non-precious metal bifunctional electrocatalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jonas Blahnik, Jennifer Schuster, Rainer Mueller, Eva Mueller, Werner Kunz
Summary: This study investigates the relationship between the morphology of PMMA monopolymers and PMMA-PHEMA copolymers with the expected nature of surfactant-free microemulsions (SFMEs) before polymerization. It is found that previously mesostructured, surfactant-free mixtures can produce porous polymers of different morphologies, while unstructured, oil-rich regions lead to solid, transparent polymers without nanostructured morphologies. Additionally, a surfactant-based reference system shows similar phase behavior and polymer morphologies as the comparable surfactant-free system, indicating the importance of the hydrotropic behavior of HEMA in this system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zheng-Fen Pu, Wen-Zhi She, Rong Sheng Li, Qiu-Lin Wen, Bi-Chao Wu, Chun-Hua Li, Jian Ling, Qiue Cao
Summary: This study synthesized two framework-isomeric covalent organic frameworks (COFs) and discovered that the light scattering signal of COFs can be used for the analytical detection of lead ions. By controlling synthesis conditions and introducing regulators, the morphology of COFs could be controlled and framework-isomeric COFs could be precisely synthesized.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yuchen Weng, Ying Hong, Jingyu Deng, Sicheng Cao, Li-Juan Fan
Summary: This paper reports the preparation of dynamic color-changing fluorescent polymer nanoparticles (PNPs) by constructing a fluorescence resonance energy transfer (FRET) pair. The PNPs show excellent anti-counterfeiting effects and reproducibility. The study demonstrates a promising encryption strategy that can achieve multiple outputs with simple operation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Guodong Liu, Zijian Wang, Jianing Wang, Hanbin Liu, Zhijian Li
Summary: This study investigates the combination of multicolor switchable polyaniline (PANI) electrode and 1-methyl-4,4'-bipyridyl iodide (MBI), which demonstrates superior optical properties in visible and near-infrared light modulation, as well as excellent electrochemical performances. This combination can be used to develop novel electrochromic devices for applications in smart packaging, smart labels, and flexible smart windows.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Huying Yan, Yang Guo, Xingzhi Bai, Jiawei Qi, Haipeng Lu
Summary: By modifying Ti3C2Tx through heterogeneous interface engineering, optimized impedance matching is achieved, leading to enhanced electromagnetic wave absorption performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Kehu Zhang, Yang Zhou, Silvia Moreno, Simona Schwarz, Susanne Boye, Brigitte Voit, Dietmar Appelhans
Summary: This article presents an advanced crosslinking strategy to fabricate clustered polymersomes using host-guest interactions. By controlling the input of crosslinker and environmental conditions, reversible aggregation and disassembly of these polymersomes can be achieved. The size and structure of these clustered polymersomes can be regulated and visualized through a fluorescent enzymatic cascade reaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Physical
Junjie Xu, Weixiong Huang, Ruiling Li, Li Li, Jinjin Ma, Jiaou Qi, Haiyan Ma, Min Ruan, Lilin Lu
Summary: In this study, a potassium doped palladium catalyst was developed for acetylene hydrogenation, showing excellent catalytic performance and durability. The doping of potassium effectively weakened the adsorption of ethylene, improved ethylene selectivity, and lowered the barriers of hydrogen activation and transfer reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
