Article
Mechanics
Brian E. McKenzie, Henry C. W. Chu, Stephen Garoff, Robert D. Tilton, Aditya S. Khair
Summary: Diffusiophoresis refers to the motion of a colloidal particle in a solute concentration gradient. In this study, the diffusiophoretic motion of a viscous drop in a gradient of neutral solute is theoretically analyzed. It is found that in a spatially uniform gradient, the spherical drop experiences no tendency to deform. However, in a non-uniform gradient, the drop shape can be deformed depending on the attractive or repulsive solute-drop interaction.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Jose Martin-Roca, Francisco Ortega, Chantal Valeriani, Ramon Gonzalez Rubio, Fernando Martinez-Pedrero
Summary: The self-assembly capacity of magnetic colloids is utilized to construct pathways for the transport of magnetic micro/nanoparticles under low Reynolds number conditions. This approach has wide-ranging applications in drug delivery and microcargo guidance in biological environments and microfluidic platforms.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Mechanics
Julia Gerber, Thomas M. Schutzius, Dimos Poulikakos
Summary: The study shows that the topography of deposit on soft materials can be controlled by changing the environmental humidity, affecting the coffee ring effect. By regulating the evaporative flux, bifurcation of lines can be triggered on soft substrates.
JOURNAL OF FLUID MECHANICS
(2021)
Review
Chemistry, Multidisciplinary
Ke Wang, Seong Hun Park, Jintao Zhu, Jung Kyu Kim, Lianbin Zhang, Gi-Ra Yi
Summary: 2D nanoscale patterns are widely studied for various applications, with gold nanoparticles demonstrating unnaturally high refractive index as optical meta-materials. Recent advances in colloidal chemistry allow for the fabrication of non-periodic colloidal nanostructures, potentially useful for optical meta-surfaces. The article provides a brief overview of optical meta-materials, reviews progress in high-index and negative-index meta-materials, and discusses experimental progress in high-precision self-assembly for meta-surface fabrication.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Qingqing Huo, Yue Gao, Wenbo Wu, Shuai Hu, Zifan Zhang, Zhi Li, Yuling Tian, Peng Quan, Wen Li, Dongfei Liu
Summary: In this study, a simple, versatile, and robust method was developed to control the phase-transfer of cargo colloids using interfacial self-assembled amphiphilic polymer molecules. By increasing the concentration of amphiphilic polymers, a thick three-dimensional polymer layer was formed at the oil-water interface, effectively preventing the phase-transfer of cargo colloids. The method showed high encapsulation efficiency for proteins and peptides and could be used for treating diabetes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Multidisciplinary
Fanan Wei, Tianliang Zhong, Ziheng Zhan, Ligang Yao
Summary: The fabrication of micro-nanorobots through self-assembly not only addresses the challenge of large-scale manufacturing, but also enhances the reconfigurability of structure and adaptability to the environment. This promises further development as microsurgeons and applications in fields such as environmental restoration and micro-manipulation.
Review
Chemistry, Multidisciplinary
Yating Bai, Xing Wang, Xinru Wang, Xujie Yang, Xinke Li, Hanwen Xin, Dayin Sun, Jinghui Zhou
Summary: Lignin, as the most abundant source of renewable aromatic compounds on the planet, has the potential to replace petroleum-based chemicals and products, attracting increasing scholarly attention. However, its heterogeneity at different levels prevents its full utilization. Finding a general preparation method to achieve the integrated utilization of lignin molecules at all levels is the key to solving this problem. Therefore, a comprehensive understanding of the assembly behavior of lignin in different solvents is of great scientific importance.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Mohammed Elismaili, Lydiane Becu, Hong Xu, David Gonzalez-Rodriguez
Summary: This study experimentally and theoretically investigates the dynamics of two-dimensional clusters of paramagnetic colloids under a time-varying magnetic field, revealing collective viscoelastic properties and rapid cluster disassembly dynamics. A theoretical model is developed to explain these phenomena, capturing the observed dependence on particle, cluster, and field characteristics, and providing estimates of cluster viscoelasticity. The findings highlight physical mechanisms that may be relevant to biological aggregates with similar dynamic behaviors.
Article
Multidisciplinary Sciences
Angus McMullen, Sascha Hilgenfeldt, Jasna Brujic
Summary: This research demonstrates that by controlling the number of bonds between particles and selecting the appropriate molecular properties of linkers, programmed microscale self-organization can be achieved to form specific structures.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Polymer Science
Xin Guan, Jingjing Wei, Yufei Xia, To Ngai
Summary: In this study, a direct approach for the fabrication of noncovalent raspberry-shaped microgels was developed. This approach utilizes electrostatically driven heterocoagulation of binary microgels with complementary functional groups at the oil-water interface. The results show that the addition of hexanoic acid improves the hydrophobicity and interfacial activity of microgels, and raspberry-shaped microgels achieve high coverage on the droplet surface, resulting in an elastic interface and excellent stability of emulsions.
Article
Computer Science, Artificial Intelligence
Zijian Chao, Shuli Cheng, Yongming Li
Summary: This paper proposes a deep internally connected Transformer hashing (DICTH) approach to address the issue of limited global dependency information in image retrieval using convolutional neural networks (CNN). By introducing the internally connected Transformer block (ICT) and an improved cross-entropy loss function, DICTH demonstrates improved performance on multiple datasets.
KNOWLEDGE-BASED SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Eduard O. Bobylev, David A. Poole, Bas de Bruin, Joost N. H. Reek
Summary: Supramolecular coordination-based self-assembled nanostructures have been widely studied, with a focus on designing kinetically stable Pt12L24 nanospheres. It was found that the rigidity of the ditopic ligand is a key parameter in the controlled formation of these nanospheres. Coordination additives are needed to selectively form Pt12L24 assemblies, which are stable in the presence of chloride, amines and acids unlike their palladium analogues.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Multidisciplinary Sciences
Carl P. Goodrich, Ella M. King, Samuel S. Schoenholz, Ekin D. Cubuk, Michael P. Brenner
Summary: The text discusses the importance of the inverse problem of designing component interactions to target emergent structure and kinetics in various fields such as biotechnology, materials science, and statistical physics. By utilizing automatic differentiation, precise kinetic pathways can be designed and manipulated to control the rate of specific structure formation in systems. This approach can also provide insights into the high-dimensional design space and predict the control of multiple kinetic features simultaneously and independently.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Physical
Muhammad Arsalan, Noor-Ul-Ain Babar, Ayesha Sadiqa, Shakeela Mansha, Nadeem Baig, Laraib Nisar, Muhammad Naeem Ashiq, Tawfik A. Saleh, Khurram Saleem Joya
Summary: This study presents a simple preparative method for high efficiency water oxidation using surface-assembled Fe(OH)(x)/FeOx type colloidal catalytic thin-films, with or without post annealing. The catalyst annealed at 250 degrees Celsius shows remarkable stability and lower overpotential for water oxidation, making it a potential enduring, inexpensive and competent candidate for catalyzing water oxidation reaction under begin conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Polymer Science
Wen-Yu Guo, Bo Peng
Summary: The study found that ultrasonic oscillations can improve the performance of water-bentonite drilling fluids, including reducing fluid loss, mud cake thickness, and rheological values, while increasing the adsorption of the terpolymer on bentonite, and improving particle size and distribution.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.