Article
Chemistry, Multidisciplinary
You-Liang Zhu, Dapeng Wang, Jun-Lei Guan, Zhao-Yan Sun, Zhongyuan Lu
Summary: Nanoparticle surfactants can form elastic monolayers at the interface of immiscible liquids and structure the liquids. They perform better than Janus nanoparticles in dynamically structuring liquids due to their ability to quickly fill the interface and prevent consecutive shape changes of the liquids.
Article
Materials Science, Multidisciplinary
Caleb H. Meredith, Alexander C. Castonguay, Yu-Jen Chiu, Allan M. Brooks, Pepijn G. Moerman, Peter Torab, Pak Kin Wong, Ayusman Sen, Darrell Velegol, Lauren D. Zarzar
Summary: In this study, the chemomechanical framework underlying the self-propulsion of biphasic Janus oil droplets solubilizing in aqueous surfactant is uncovered. The influence of oil mixing, droplet shape, and oil solubilization rates on droplet propulsion is elucidated. Spatiotemporal control over droplet swimming speed and orientation is demonstrated through the application of thermal gradients.
Article
Geosciences, Multidisciplinary
G. Clark, P. Kollmann, B. H. Mauk, C. Paranicas, D. Haggerty, A. Rymer, H. T. Smith, J. Saur, F. Allegrini, S. Duling, R. W. Ebert, W. S. Kurth, R. Gladstone, T. K. Greathouse, W. Li, F. Bagenal, J. E. P. Connerney, S. Bolton, J. R. Szalay, A. H. Sulaiman, C. J. Hansen, D. L. Turner
Summary: This study presents and analyzes unique measurements of Ganymede's magnetosphere obtained by NASA's Juno mission. The study identifies distinct regions of the magnetosphere, characterizes inbound and outbound magnetospheric boundaries, a magnetotail/wake region, and Ganymede's open field line region. It also documents evidence of energy dependent electron pitch angle structuring and electron precipitation mapped to Ganymede's surface.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Vaibhav Sharma, Carlos M. Marques, Antonio Stocco
Summary: This experiment investigates the interaction between Janus colloids and giant lipid vesicles, demonstrating that external forces can force contact between the particles and the membranes, resulting in partial engulfment. The surface properties of the Janus colloids play a crucial role in this process.
Article
Chemistry, Multidisciplinary
Jiaxian Liu, Zhaoqi Tan, Xiaozhong Qu, Fuxin Liang, Zhenzhong Yang
Summary: Cross-linked epoxy resin (EP) single-hole Janus hollow spheres are prepared by cross-linking induced phase separation and selective modification. The size of the hole and cavity can be controlled by adjusting the solvent content and cross-linker concentration. Using frozen wax as the core material allows for effective protection of the sphere's interior surface, enabling selective modification.
Article
Chemistry, Multidisciplinary
Alex McGlasson, Eva Morgenthaler, Laura C. Bradley, Thomas P. Russell
Summary: This study investigates the interfacial kinetics and assembly mechanism of anisotropic amphiphilic Janus particles using dynamic pendant drop tensiometry. The results shed light on the assembly mechanism of more complex Janus particle morphologies and highlight their effectiveness as interface stabilizers.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qiangqiang Sun, Xuanming Hu, Boran Xu, Shiji Lin, Xu Deng, Shaobing Zhou
Summary: This study reports a method of manipulating droplet motion and functionalization using an invisible charge wall. The invisible charge wall can trap droplets and polarize them into charged states. Furthermore, the enrichment of proteins and nanomaterials in the manipulated charged droplets is demonstrated. This strategy provides a potential microfluidic platform with orthogonal functionalities.
Article
Polymer Science
Giovanni Russo, Marco Lattuada
Summary: Post-synthesis modifications have been used to prepare non-spherical polymer particles with Janus characteristics. By selectively dissolving one face of the Janus colloids, intriguing shapes such as mushroom-like and Janus dimpled particles can be obtained. The composition of the PMMA face and the addition of a cross-linker also affect the particles' morphology. This method provides a new approach for controlling the shape of polymer particles.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Karnika Singh, Ankit Yadav, Prateek Dwivedi, Rahul Mangal
Summary: The study investigates the motion of active SiO2-Pt Janus particles in a complex environment of passive silica tracers, revealing significant impacts of collisions on the swimmers' motion. The frequency and nature of collisions determine the overall impact of tracers on the active particles, with high-density tracers leading to novel organizational behavior of tracers around the active particles.
Article
Chemistry, Multidisciplinary
Rajarshi Roy Raju, Joachim Koetz
Summary: This study reports a modified approach for the batch scale preparation of completely engulfed core-shell emulsions or partially engulfed Janus emulsions with colorful optical properties. The in situ reduction of gold chloride at the olive oil interface leads to the formation of compartmentalized emulsion droplets in water, with time-dependent morphological transformations observed depending on the presence of chitosan or presynthesized AuNPs. The Pickering effect of AuNPs brings color effects to microdroplets and induces surprising self-assembly.
Article
Chemistry, Multidisciplinary
Lukasz Baran, Malgorzata Borowko, Wojciech Rzysko, Jakub Smolka
Summary: We use Monte Carlo simulations to investigate the behavior of Janus spheres composed of attractive and repulsive parts confined between two parallel solid surfaces. The adsorption isotherms and the impact of density on morphology are determined. Unique structures such as bilayer and three-layer structures at different distances from the walls are observed. The positional and orientational ordering in these layers are affected by selected parameters, with highly ordered hexagonal lattices formed in some cases.
Article
Chemistry, Physical
Sergii V. Siryk, Artemi Bendandi, Alberto Diaspro, Walter Rocchia
Summary: This analytical theory explores the electrostatic interactions between two spherical dielectric particles in a polarizable ionic solvent, with arbitrary charge distributions and a matrix formalism to construct asymptotic expansions in Debye screening terms. The results provide precise quantification of potential coefficients and mutual interaction energy, with applications in soft matter modeling and computational biophysics. Comprehensive numerical examples demonstrate the balance of leading and higher-order terms of the mutual interaction energy.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Xuan Ruan, Matthew T. Gorman, Shuiqing Li, Rui Ni
Summary: This paper presents a numerical method for simulating the electrostatic interaction of charged non-spherical particles during collision. The method utilizes the boundary element method (BEM) to resolve the surface charge distribution and employs the generalized minimum residual (GMRES) method with the fast multipole method (FMM) for accelerated computation. The framework is validated through different cases and successfully captures the induced higher-order multipole interaction and contact forces.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Chemistry, Physical
Hye Won Jeong, Ju Won Park, Hyang Mi Lee, Kyu Hwan Choi, Seong Jae Lee, Jin Woong Kim, Bum Jun Park
Summary: This study investigates the effects of azimuthal rotation of Janus particles at the oil-water interface on interparticle interactions using optical laser tweezers and Monte Carlo simulations. It was found that azimuthal rotation around the critical separation region can relax the capillary-induced attractive force between Janus particles, resulting in a slight increase in the scaling exponent.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Denise Chirinos-Flores, Rodrigo Sanchez, Pedro Diaz-Leyva, Anna Kozina
Summary: The study investigates the structure and dynamics of asymmetrically decorated silica-based Janus particles in a hydrophobic solvent, observing gelation of amphiphilic Janus particles with asymmetric surface decoration in the hydrophobic medium. The influence of particle asymmetry on gel structure and dynamics is discussed, revealing compact structures with contributions of asymmetric short-range attractions and cross-term repulsions to the net effective interaction potential.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)