Article
Mathematics, Applied
Denis Serre
Summary: This study examines the motion of a finite yet large number of hard spheres in space considering elastic collisions. By applying the theory of Compensated Integrability, the researchers found that only O(N-2) collisions have significant impact on the particles' deviations.
ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS
(2021)
Article
Multidisciplinary Sciences
Sharon Rechnitz, Tal Tabachnik, Michael Shlafman, Shlomo Shlafman, Yuval E. Yaish
Summary: This article reports on the nonlinear behavior of carbon nanotube mechanical resonators, which enables high frequency tunability and snap-through bi-stability. The findings have implications for various applications including sensors, memory elements, and mechanical parametric amplification.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
T. R. O. Nogueira, Jose Rafael Bordin
Summary: In this paper, the phase diagram of a dumbbell model composed of two hard-core soft-corona beads is investigated through simulations. The transition between different stripe patterns is explored, and the significant role played by the anisotropic geometry of the dumbbell structure is demonstrated. The diffusion and density in the nematic fluid phase exhibit a water-like anomalous increase under compression.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Multidisciplinary Sciences
Sarah M. Maher, Jeffrey S. Gee, Michael J. Cheadle, Barbara E. John
Summary: The study focuses on the magnetic structure of fast-spread crust, indicating the existence of subhorizontal polarity boundaries near the dike-gabbro transition. The results suggest a broad, hot axial zone in magmatically robust fast-spread ocean crust.
Editorial Material
Chemistry, Physical
William R. Smith
Summary: This is a personal account of my PhD Adviser, Doug Henderson, and our work together on hard sphere systems.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Multidisciplinary
Weicheng Huang, Longhui Qin, Qiang Chen
Summary: A method based on discrete differential geometry is proposed to study the natural frequencies of elastic rods and gridshells in their post-buckling configurations. A numerical approach is used to characterize the linear vibration near the post-buckling equilibria, and a parameter sweep is performed to quantify the vibration frequency of pre-buckled gridshells. The study finds that the natural frequency of pre-deformed rods and gridshells decreases linearly with the enlargement of compressive distance, while the vibration frequency almost linearly rises with the number of rods in a gridshell.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Chemistry, Physical
Analisa Hill, Michio Tanaka, Kevin B. Aptowicz, Chandan K. Mishra, A. G. Yodh, Xiaoguang Ma
Summary: In this study, we investigate the effects of depletion interactions on quasi-two-dimensional buckled colloidal monolayers. The results show that depletion attraction can modify the magnitude and sign of the Ising spin coupling constant, leading to a variation in the nearest-neighbor Ising spin interactions from antiferromagnetic to para- and ferromagnetic. By using a simple theory, we calculate an effective Ising nearest-neighbor coupling constant and demonstrate experimentally the depletion-induced modification of the coupling constant, including its sign and other behaviors. Additionally, we observe a crossover from an Ising antiferromagnetic to paramagnetic phase with increasing depletion attraction, and structural arrest in different regimes of the coupling constant driven by different mechanisms.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Engineering, Mechanical
Zhenyang Chen, Fangqi Chen
Summary: This paper analytically and numerically investigates the energy harvesting with bursting regimes in a piezoelectric buckled beam system under fast-slow excitation. The study reveals pitchfork bifurcations and folds of cycle in the fast sub-system, which result in small amplitude and large amplitude buckled configurations. The numerical bifurcation diagram is consistent with the analytical results. Long-term chaotic transients are observed when the amplitude of the fast excitation is relatively large. The study also discusses the bursting patterns under low-frequency excitation, both in quasi-static and non-static cases. The averaged output power analysis suggests that introducing low-frequency excitation can broaden the output bandwidth and non-static slow excitation provides better performance in the presence of weak fast sub-system transients. However, a band exists where quasi-static slow excitation provides higher output power when the fast sub-system has strong transients.
NONLINEAR DYNAMICS
(2023)
Article
Chemistry, Physical
H. J. H. Brouwers
Summary: This paper analyzes the random packing fraction of hard disks in a plane using a geometric probabilistic approach. A simple, statistical geometric model for the random loose packing of monodisperse disks is proposed. The model provides a close approximation to the packing value and enables the calculation of the contact number at different states of compaction.
Article
Chemistry, Multidisciplinary
Kazuyuki Shigeta, Tatsuya Fukuyama, Riku Takahashi, Kazusa Beppu, Aya Tanaka, Yusuke T. Maeda
Summary: Our study investigates the collective motion of a 3D-buckled polyacrylamide (PAAm) gel that mimics the shape of folds and wrinkles of epithelial tissue to understand the geometric effects of collective motion. We found that the velocity correlation near the hydrogel boundary showed periodic changes correlated with the wrinkled folding pattern of the hydrogel. The characteristic length of the velocity correlation increased proportionally with the wavelength of the wrinkled folding.
Article
Materials Science, Multidisciplinary
M. F. C. Martins Quintela, T. Garm Pedersen
Summary: The optical properties of two-dimensional materials are exceptional, with high anisotropy and dominance of excitonic effects. Breaking vertical symmetry allows for substantial out-of-plane nonlinear response, while excitonic selection rules and dielectric screening play important roles.
Article
Physics, Multidisciplinary
Lucas L. Treffenstaedt, Matthias Schmidt
Summary: The time evolution of the van Hove dynamical pair correlation function is governed by adiabatic forces and superadiabatic forces, including drag, viscous, and structural contributions. A power functional theory has been developed for hard sphere liquids to predict these universal force fields in quantitative agreement with Brownian dynamics simulation results.
PHYSICAL REVIEW LETTERS
(2021)
Article
Thermodynamics
Mohammad Malikan, Victor A. Eremeyev
Summary: This research work explores and addresses the flexomagnetic property in a shear deformable piezomagnetic structure for the first time, revealing that flexomagneticity evolves at small scale and is dominant in micro/nanosize structures.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2022)
Article
Chemistry, Multidisciplinary
Willem Gispen, Gabriele M. Coli, Robin van Damme, C. Patrick Royall, Marjolein Dijkstra
Summary: Nucleation is crucial for crystal formation and is involved in various phenomena, yet many aspects of the nucleation process remain poorly understood. In this study, the excess of particles in a face-centered-cubic (fcc)-like environment compared to a hexagonal-close-packed (hcp)-like environment in a crystal nucleus of hard spheres is explained by the higher order structure in the fluid phase. Pentagonal bipyramids, known as inhibitors of crystal nucleation, transform into Siamese dodecahedra, which are closely similar to an fcc subunit, explaining the higher propensity for fcc growth in hard spheres. This crystallization and polymorph selection mechanism is generic for crystal nucleation from a dense, strongly correlated fluid phase.
Article
Chemistry, Physical
Gianmarco Munao, Dino Costa, Gianpietro Malescio, Jean-Marc Bomont, Santi Prestipino
Summary: In this study, a novel mechanism for the formation of striped structures has been proposed. By introducing a long-range attraction between like particles in a binary mixture of hard spheres, stripes can be formed. This finding opens up new possibilities for synthesizing colloidal particles with stripe-modulated structures.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Anne S. Meeussen, Erdal C. Oguz, Yair Shokef, Martin van Hecke
Article
Physics, Multidisciplinary
A. S. Meeussen, E. C. Oguz, M. van Hecke, Y. Shokef
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Erdal C. Oguz, Antonio Ortiz-Ambriz, Hadas Shem-Tov, Eric Babia-Soler, Pietro Tierno, Yair Shokef
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
David Gomez, Eial Teomy, Ayelet Lesman, Yair Shokef
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Lea Sirota, Roni Ilan, Yair Shokef, Yoav Lahini
PHYSICAL REVIEW LETTERS
(2020)
Article
Engineering, Mechanical
Lea Sirota, Daniel Sabsovich, Yoav Lahini, Roni Ilan, Yair Shokef
Summary: The study introduces the concept of a feedback-based topological acoustic metamaterial for autonomously guiding sound beams along arbitrary curved paths in free two-dimensional space. By creating a desired dispersion profile in closed-loop, the metamaterial can exhibit analogies of quantum topological wave phenomena, enabling unconventional and robust sound beam guiding. The feedback-based design allows for arbitrary physical interactions in the metamaterial, paving the way for unconventional acoustic wave guiding on the same reprogrammable platform.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Physics, Multidisciplinary
Ben Pisanty, Erdal C. Oguz, Cristiano Nisoli, Yair Shokef
Summary: Mechanical metamaterials provide a promising platform for seemingly impossible mechanics. By analogizing to ferromagnetic and antiferromagnetic binary spin interactions, identifying and analyzing topological mechanical defects for arbitrary building blocks becomes possible. These topological defects can steer stresses and strains in a controlled and nontrivial manner, inspiring the design of materials with complex mechanical response.
Article
Chemistry, Physical
Camilla Sammartino, Yair Shokef, Bat-El Pinchasik
Summary: Liquid diodes are surface structures that enable the spontaneous flow of liquids in a specific direction. By simulating, designing, and 3D printing liquid diode networks, the researchers provide guidelines for directional liquid transport and introduce percolation theory to identify the threshold between connected and disconnected networks. Through constructing well-defined networks with uni- and bidirectional pathways, they experimentally demonstrate the applicability of models describing isotropically directed percolation and accurately predict network permeability and liquid final state. These guidelines show great promise for the development of structures for spontaneous, yet predictable, directional liquid transport.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Fluids & Plasmas
Chaviva Sirote, Yair Shokef
Summary: Living cells respond to mechanical changes in the matrix surrounding them by applying contractile forces that are transmitted to distant cells. The mechanical work and energy changes of cells are calculated and studied based on the spatial arrangement and properties of the cells. Cells can be attracted or repelled by each other, depending on their behavior and properties, with different effects observed in different geometries.
Article
Physics, Multidisciplinary
Carl Merrigan, Cristiano Nisoli, Yair Shokef
Summary: Competing ground states can lead to topologically constrained excitations like domain walls or quasipartides, which govern metastable states and their dynamics. This study proposes a mechanical spin ice system with bistable unit cells, and shows new behaviors emerging in this overdamped mechanical system. By controlling the ratios of internal elements, the morphology and propagation speed of internal domain walls can be manipulated, and different steady cycles are produced by textured forcing, suggesting the system could be useful for studying multistability, glassiness, and memory in materials.
PHYSICAL REVIEW RESEARCH
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
L. Sirota, Y. Lahini, R. Ilan, Y. Shokef
2020 FOURTEENTH INTERNATIONAL CONGRESS ON ARTIFICIAL MATERIALS FOR NOVEL WAVE PHENOMENA (METAMATERIALS)
(2020)
Article
Physics, Fluids & Plasmas
Eial Teomy, Yair Shokef
Article
Physics, Multidisciplinary
Carl Merrigan, Kabir Ramola, Rakesh Chatterjee, Nimrod Segall, Yair Shokef, Bulbul Chakraborty
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Biomaterials
David Gomez, Sari Natan, Yair Shokef, Ayelet Lesman
ADVANCED BIOSYSTEMS
(2019)
Article
Physics, Fluids & Plasmas
Gregory Bolshak, Rakesh Chatterjee, Rotem Lieberman, Yair Shokef
