Article
Multidisciplinary Sciences
Jan Smrek, Jonathan Garamella, Rae Robertson-Anderson, Davide Michieletto
Summary: The study reveals that larger supercoiling in dense supercoiled DNA increases the size of entangled plasmids and enhances DNA mobility. These findings suggest a way to tune DNA mobility via supercoiling, enabling topological control over the (micro)rheology of DNA-based complex fluids.
Article
Multidisciplinary Sciences
D. Michieletto, P. Neill, S. Weir, D. Evans, N. Crist, V. A. Martinez, R. M. Robertson-Anderson
Summary: The study demonstrates time-dependent rheology of DNA solutions via enzymatically-driven architectural alterations by restriction endonucleases. The rheological properties of the systems depend on the concentrations and properties of DNA and REs, showcasing tunable behaviors with potential applications in both industry and biology.
NATURE COMMUNICATIONS
(2022)
Article
Polymer Science
Tom Herschberg, Jan-Michael Y. Carrillo, Bobby G. Sumpter, Eleni Panagiotou, Rajeev Kumar
Summary: The study found that the topology of polymer chains significantly influences the order-disorder transition of AB diblock copolymer melts, with linear and ring chains remaining stretched while knot chains experience stretching and tightening in disordered melts.
Article
Materials Science, Ceramics
Yushu Hu, Zegao Liu, Kai Yang, N. M. Anoop Krishnan, Morten M. Smedskjaer, Gaurav Sant, Mathieu Bauchy
Summary: Topological constraint theory is extensively used to describe how the composition and structure of glasses and glass-forming melts control their properties. A generic method based on molecular dynamics simulations has been proposed to predict the onset temperature below which constraints become active, and the difference in onset temperatures largely governs the fictive temperature of glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Sudheer Ganisetti, Achraf Atila, Julien Guenole, Aruna Prakash, Juergen Horbach, Lothar Wondraczek, Erik Bitzek
Summary: This study provides a microscopic understanding of the topological anisotropy in silica glass, induced by mechanical loads, using novel analysis methods on glasses generated by molecular dynamics simulations. The anisotropy originates from the preferred orientation of SiO4 tetrahedra in the silica network, which can be controlled through different mechanical loading modes. The findings elucidate the relation between deformation and the resulting anisotropic structure, providing important insight for the design of oxide glasses with tailored materials properties.
Article
Polymer Science
Xiang-Yu Song, Zhen-Yue Yang, Qi-Lu Yuan, Shang-Wei Li, Zi-Qiang Tang, Yue-Tong Dong, Shi-Chun Jiang, Wen-Sheng Xu
Summary: Having highly tunable molecular topology is one of the most important characteristics of polymers. Ring polymers exhibit distinct properties from linear polymers. We compared the glass formation of ring and linear polymer melts and found that the mass dependence of glass properties is weak in ring polymers but strong in linear polymers. We also proposed a string model to describe the glass formation of ring polymers.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Giuseppe Porpora, Francesco Rusciano, Raffaele Pastore, Francesco Greco
Summary: Glass transition is an intriguing open issue in molecular liquids, and recent research has found that the relationship between macroscopic timescales and cage-jump quantities changes on approaching the glass transition.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Multidisciplinary Sciences
Andrea Bonato, Davide Marenduzzo, Davide Michieletto, Enzo Orlandini
Summary: This research investigates the cutting and reconnection operations of semiflexible polymer rings in a confined environment. The study reveals a topological gelation transition in DNA recombination systems, where increasing stiffness or concentration of the rings triggers the transition. The findings have implications for understanding the biophysics and topology of genomes undergoing DNA reconnection, as well as for designing polymeric complex fluids with desired topologies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Polymer Science
Yu-Ting Guo, Changxia Shi, Tian-Yi Du, Xiang-Yue Cheng, Fu-Sheng Du, Zi-Chen Li
Summary: The design and synthesis of closed-loop recyclable polymers using ring-opening polymerization (ROP) is a promising solution to address plastic pollution and economic loss. The resulting poly(ester-amide)s (PEAs) exhibit tunable mechanical properties, good thermal stability, and excellent recyclability.
Article
Chemistry, Physical
Xin Zhou, Junsheng Yang, Jie Yang, Panchao Yin
Summary: Topological interaction plays a dominant role in the viscoelasticity of subnanoscale polyhedral oligomeric silsesquioxane assemblies, offering broad tunability. By tailoring molecular topologies, their viscoelasticity can be widely adjusted. The assembly also exhibits unique hierarchical relaxation dynamics, which inspire the design of impact resistant materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Ceramics
Rebecca S. Welch, Kuo-Hao Lee, Collin J. Wilkinson, Madoka Ono, Caio B. Bragatto, John C. Mauro
Summary: The study shows that oxygen triclusters have a certain impact in the calcium aluminosilicate glass system, potentially increasing glass hardness. Compared to oxynitride glasses, triclusters have a similar effect to nitrogen in increasing glass hardness but are less effective in increasing Young's modulus.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Polymer Science
Xiangrui Zheng, Yafang Guo, Jack F. Douglas, Wenjie Xia
Summary: To understand the structure-property relationships of cross-linked thermosetting polymers, this study investigates the effect of cohesive energy and cross-link density on their segmental dynamics and mechanical properties. Increasing cross-link density leads to higher glass transition temperature and fragility of glass formation, while increasing cohesive energy decreases fragility. Additionally, the macroscopic mechanical properties are strongly correlated with the local molecular stiffness. These findings provide insights for the molecular design of cross-linked thermosets.
Article
Computer Science, Interdisciplinary Applications
Tom Herschberg, Kyle Pifer, Eleni Panagiotou
Summary: Introduces a software called TEPPP (Topological Entanglement in Polymers, Proteins and Periodic systems) that measures the topological complexity of entangled systems. The software calculates the Writhe, Gauss linking integral, and Jones polynomial of each filament or pair of filaments in the system. It also measures self and pairwise entanglement at different length scales along the chains.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Ondrej Gedeon
Summary: The study modeled vitreous silica using molecular dynamics and suggested the Debye relaxation model to simulate the evolution of entropy during system cooling. It found that the relaxation of configurational entropy of MD mimics the glass transition near T-g and explains the observed phenomena during the MD evolution.
Article
Physics, Fluids & Plasmas
Harveen Kaur, Mark A. Berg
Summary: A study reveals the presence of a crossover temperature in supercooled liquids, separating regions of diffusive and activated dynamics. The dynamic crossover involves phenomena such as the development of heterogeneity, increasing jump size, emergence of a jump-precursor state, and lengthening exchange time.
Article
Physics, Multidisciplinary
S. Alex Rautu, George Rowlands, Matthew S. Turner
Article
Multidisciplinary Sciences
Henry J. Charlesworth, Matthew S. Turner
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
Article
Polymer Science
Angelo Rosa, Jan Smrek, Matthew S. Turner, Davide Michieletto
Article
Physics, Multidisciplinary
Sami C. Al-Izzi, Pierre Sens, Matthew S. Turner
PHYSICAL REVIEW LETTERS
(2020)
Article
Polymer Science
Davide Michieletto, Enzo Orlandini, Matthew S. Turner, Cristian Micheletti
Article
Business, Finance
A. K. Karlis, G. Galanis, S. Terovitis, M. S. Turner
Summary: This study finds that when the degree of heterogeneity among hedge funds' demand orders is sufficiently high, the possibility of clustered defaults increases. Poorly performing hedge funds are able to obtain a higher market share, leading to an extension of their survival time and an increased probability of collective defaults.
QUANTITATIVE FINANCE
(2021)
Article
Multidisciplinary Sciences
Arthur E. B. T. King, Matthew S. Turner
Summary: The collective motion of animal groups often shows velocity-velocity correlations between nearest neighbours, with the strongest correlations observed at the shortest inter-animal spacings. This study found that even when interactions are non-local, the strongest velocity correlations still emerge at the shortest distances.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Article
Physics, Multidisciplinary
Jintao Li, Simon K. Schnyder, Matthew S. Turner, Ryoichi Yamamoto
Summary: Cells coexist in colonies or tissues, their behavior is controlled by intercellular forces and biochemical regulation. Researchers develop a simple model of the cell cycle and couple it with physical forces within the cell collective, analyzing it through computer simulations and a continuum theory. The study focuses on 2D colonies confined in a channel, showing the relationship between substrate friction and cell-cycle parameters in measuring these parameters experimentally.
Article
Robotics
C. C. Lakey, M. S. Turner
Summary: This study investigates the interactions and dynamical phases of self-propelled agents, specifically motile particles embedded in a smectic liquid crystal. The findings show that different phases emerge based on the stiffness of the liquid crystal and the reorientation time of the particles, including ballistic motion, clustering, and collective motion. The addition of angular noise also leads to an order-to-disorder transition.
ARTIFICIAL LIFE AND ROBOTICS
(2022)
Article
Multidisciplinary Sciences
Shun Imamura, Kohei Sawaki, John J. Molina, Matthew S. Turner, Ryoichi Yamamoto
Summary: This study uses numerical simulations to investigate the influence of hydrodynamic interactions on the collective behavior of wet active matter systems. Quincke rollers, which are artificial microswimmers, are used as the model system. The study reveals that far-field hydrodynamic effects drive ordered collective motion, while near-field hydrodynamic effects drive disordered collective behavior. The simulations are able to capture the role of hydrodynamic effects between rollers without resorting to previous approximations.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Physics, Multidisciplinary
Chao Feng, Matthew S. Turner, Ryoichi Yamamoto
Summary: In this paper, we present numerical simulations that investigate the hydrodynamic flows associated with a single microswimmer near a deformable interface. We find that the microswimmer can either penetrate, move parallel to, or bounce back off the interface. The trajectory depends on the swimmer type (pusher/puller) and the angle of incidence with respect to the interface.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Multidisciplinary
Jintao Li, Simon K. Schnyder, Matthew S. Turner, Ryoichi Yamamoto
Summary: Competition between different cell types is crucial in bacterial ecology, developmental biology, and tumor growth. Synchronization in cell division/apoptosis events can lead to oscillations in pressure and cell-cycle activity. Additionally, the pressure at the colony interface can affect the coexistence and invasion of cell types.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Multidisciplinary Sciences
Harvey L. Devereux, Colin R. Twomey, Matthew S. Turner, Shashi Thutupalli
Summary: The study on collective dynamics of whirligig beetles swimming on water surface revealed density-dependent speed scaling, inertial delay for velocity alignment, and coexisting high and low-density phases, consistent with motility-induced phase separation theory. By modifying a model, the researchers successfully explained the co-occurrence of high- and low-density phases observed in the data.
JOURNAL OF THE ROYAL SOCIETY INTERFACE
(2021)
Article
Chemistry, Physical
Sami C. Al-Izzi, Pierre Sens, Matthew S. Turner, Shigeyuki Komura
Article
Physics, Multidisciplinary
Piermarco Fonda, Sami C. Al-Izzi, Luca Giomi, Matthew S. Turner
PHYSICAL REVIEW LETTERS
(2020)