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Correction: Comparative study on formic acid sensing properties of flame-made Zn2SnO4 nanoparticles and its parent metal oxides

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Physical Chemistry Chemical physics 2023年第27期25卷 18497-18498页

作者： Matawee Punginsang Kanittha Inyawilert Mameaseng Siriwalai Anurat Wisitsoraat Adisorn Tuantranont Chaikarn Liewhiran Department of Physics and Materials Science Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand PhD Program in Nanoscience and Nanotechnology (International Program/Interdisciplinary) Faculty of Science Chiang Mai University Chiang Mai Thailand Graduate School Chiang Mai University Chiang Mai Thailand Center of Excellence in Materials Science and Technology Chiang Mai University Chiang Mai 50200 Thailand National Security and Dual-Use Technology Center National Science and Technology Development Agency (NSTDA) Klong Luang Phathum Thani 12120 Thailand

Correction for ‘Comparative study on formic acid sensing properties of flame-made Zn2SnO4 nanoparticles and its parent metal oxides’ by Matawee Punginsang et al., Phys. Chem. Chem. Phys., 2023, 25, 15407–15421, htt...

Correction for ‘Comparative study on formic acid sensing properties of flame-made Zn₂SnO₄ nanoparticles and its parent metal oxides’ by Matawee Punginsang et al., Phys. Chem. Chem. Phys., 2023, 25, 15407–15421, https://***/10.1039/D3CP00845B.

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Designing the pressure-dependent shear modulus using tessellated granular metamaterials

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Physical Review E 2023年第3期108卷 034901-034901页

作者： Jerry Zhang Dong Wang Weiwei Jin Annie Xia Nidhi Pashine Rebecca Kramer-Bottiglio Mark D. Shattuck Corey S. O'Hern Department of Mechanical Engineering & Materials Science Yale University New Haven Connecticut 06520 USA Benjamin Levich Institute and Physics Department The City College of New York New York New York 10031 USA Department of Physics Yale University New Haven Connecticut 06520 USA Department of Applied Physics Yale University New Haven Connecticut 06520 USA Integrated Graduate Program in Physical and Engineering Biology Yale University New Haven Connecticut 06520 USA

Jammed packings of granular materials display complex mechanical response. For example, the ensemble-averaged shear modulus 〈G〉 increases as a power law in pressure p for static packings of soft spherical particles that can rearrange during compression. We seek to design granular materials with shear moduli that can either increase or decrease with pressure without particle rearrangements even in the large-system limit. To do this, we construct tessellated granular metamaterials by joining multiple particle-filled cells together. We focus on cells that contain a small number of bidisperse disks in two dimensions. We first study the mechanical properties of individual disk-filled cells with three types of boundaries: periodic boundary conditions (PBC), fixed-length walls (FXW), and flexible walls (FLW). Hypostatic jammed packings are found for cells with FLW, but not in cells with PBC and FXW, and they are stabilized by quartic modes of the dynamical matrix. The shear modulus of a single cell depends linearly on p. We find that the slope of the shear modulus with pressure λc<0 for all packings in single cells with PBC where the number of particles per cell N≥6. In contrast, single cells with FXW and FLW can possess λc>0, as well as λc<0, for N≤16. We show that we can force the mechanical properties of multicell granular metamaterials to possess those of single cells by constraining the end points of the outer walls and enforcing an affine shear response. These studies demonstrate that tessellated granular metamaterials provide a platform for the design of soft materials with specified mechanical properties.

关键词： Jamming Granular solids Mechanical metamaterials

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Characterizing the mechanical response of metallic glasses to uniaxial tension using a spring network model

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Physical Review Materials 2023年第7期7卷 073605-073605页

作者： Aya Nawano Weiwei Jin Jan Schroers Mark D. Shattuck Corey S. O'Hern Department of Mechanical Engineering and Materials Science Yale University New Haven Connecticut 06520 USA Benjamin Levich Institute and Physics Department The City College of New York New York New York 10031 USA Department of Physics Yale University New Haven Connecticut 06520 USA Department of Applied Physics Yale University New Haven Connecticut 06520 USA Graduate Program in Computational Biology and Bioinformatics Yale University New Haven Connecticut 06520 USA

A coarse-grained spring network model is proposed for the prediction of the mechanical response of metallic glasses as a function of the microstructure prior to loading. This model describes the mechanical response of metallic glasses using a network of parallel springs that can break and reform, mimicking atomic rearrangements during deformation. We compare predictions of the spring network model for stress versus strain to results from numerical simulations of athermal quasistatic, uniaxial tensile deformation of Cu50Zr50 metallic glasses using Lennard-Jones (LJ) and embedded atom method (EAM) atomic interactions. We show that both the LJ and EAM models possess qualitatively similar stress σ versus strain γ curves. By specifying five parameters [ultimate strength, strain at ultimate strength, slopes of σ(γ) at γ=0 and at large strain, and strain at fracture where σ=0], we demonstrate that the spring network model can accurately describe the form of the stress-strain curves during uniaxial tension for the computational studies of Cu50Zr50, as well as recent experimental studies of several Zr-based metallic glasses.

关键词： Alloys Amorphous materials Glasses Packing & jamming problems Molecular dynamics

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Emulating complex synapses using interlinked proton conductors

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Physical Review Applied 2025年第1期23卷 014027-014027页

作者： Lifu Zhang Ji-An Li Yang Hu Jie Jiang Rongjie Lai Marcus K. Benna Jian Shi Department of Materials Science and Engineering Rensselaer Polytechnic Institute Troy New York 12180 USA Neurosciences Graduate Program University of California San Diego La Jolla California 92093 USA Department of Mathematics Purdue University West Lafayette Indiana 47907 USA Department of Neurobiology School of Biological Sciences University of California at San Diego La Jolla California 92093 USA Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute Troy New York 12180 USA

In terms of energy efficiency and computational speed, neuromorphic electronics based on nonvolatile memory devices are expected to be one of most promising hardware candidates for future artificial intelligence (AI). However, catastrophic forgetting, networks rapidly overwriting previously learned weights when learning new tasks, remains a pivotal obstacle in either digital or analog AI chips for unleashing the true power of brainlike computing. To address catastrophic forgetting in the context of online memory storage, a complex synapse model (the Benna-Fusi model) was proposed recently [M. K. Benna and S. Fusi, Nat. Neurosci. 19, 1697 (2016)], the synaptic weight and internal variables of which evolve following diffusion dynamics. In this work, by designing a proton transistor with a series of charge-diffusion-controlled storage components, we have experimentally realized the Benna-Fusi artificial complex synapse. Memory consolidation from coupled storage components is revealed by both numerical simulations and experimental observations. Different memory timescales for the complex synapse are engineered by the diffusion length of charge carriers and the capacity and number of coupled storage components. The advantages of the demonstrated complex synapse for both memory capacity and memory consolidation are revealed by neural network simulations of face-familiarity detection. Our experimental realization of the complex synapse suggests a promising approach to enhance memory capacity and to enable continual learning.

关键词： Nonvolatile storage

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Non-Hermitian topological Fermi superfluid near the p-wave unitary limit

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Physical Review A 2023年第3期107卷 033331-033331页

作者： Hiroyuki Tajima Yuta Sekino Daisuke Inotani Akira Dohi Shigehiro Nagataki Tomoya Hayata Department of Physics Graduate School of Science University of Tokyo Tokyo 113-0033 Japan Astrophysical Big Bang Laboratory (ABBL) RIKEN Cluster for Pioneering Research Wako Saitama 351-0198 Japan Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) RIKEN Wako Saitama 351-0198 Japan Departments of Physics Keio University 4-1-1 Hiyoshi Kanagawa 223-8521 Japan Department of Physics Hiroshima University Higashi-Hiroshima 739-8526 Japan

We discuss theoretically the non-Hermitian superfluid phase transition in one-dimensional two-component Fermi gases near the p-wave Feshbach resonance accompanied by the two-body loss associated with dipolar relaxation. We point out that this system gives us an opportunity to explore the interplay among various nontrivial properties such as universal thermodynamics at divergent p-wave scattering lengths, the topological phase transition at vanishing chemical potential, and the non-Hermitian Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensate (BEC) transition, in a unified manner. In the BCS phase, the loss-induced superfluid-normal transition occurs when the exceptional point appears in the effective non-Hermitian Hamiltonian. In the BEC phase, the diffusive gapless mode can be regarded as a precursor of the instability of the superfluid state. Moreover, we show that the superfluid state is fragile against the two-body loss near the topological phase transition point.

关键词： BEC-BCS crossover Fermi gases Topological phase transition Topological superconductors p-wave Non-Hermitean systems

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Dielectric properties of a ferroelectric nematic material: quantitative test of the polarization-capacitance Goldstone mode

arXiv

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arXiv 2024年

作者： Adaka, Alex Rajabi, Mojtaba Haputhantrige, Nilanthi Sprunt, S. Lavrentovich, O.D. Jakli, A. Materials Science Graduate Program Kent State University KentOH44242 United States Department of Physics Kent State University KentOH44242 United States Advanced Materials and Liquid Crystal Institute Kent State University KentOH44242 United States

The recently discovered ferroelectric nematic (NF) liquid crystals (LC) have been reported to show an extraordinarily large value of the real part of the dielectric constant (ϵ' >103) at low frequencies. However, it was argued by Clark et al in Physical Review Research 6, 013195 (2024) that what was measured was the capacitance of the insulating layer at LC/electrode surface and not that of the liquid crystal. Here we describe the results of dielectric spectroscopy measurements of an NF material in cells with variable thickness of the insulating layers. Our measurements quantitatively verify the model by Clark et al. Additionally, our measurements in cells with bare conducting indium tin oxide surface provide a crude estimate of ϵ⊥∼102in the NF phase. © 2024, CC BY-NC-ND.

关键词： Ferroelectricity

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Dynamical evolution of critical fluctuations with second-order baryon diffusion coupled to chiral condensate

arXiv

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arXiv 2025年

作者： Sakai, Azumi Murase, Koichi Fujii, Hirotsugu Hirano, Tetsufumi Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima Higashi-Hiroshima739-8526 Japan Department of Physics Sophia University Chiyoda Tokyo102-8554 Japan Department of Physics Tokyo Metropolitan University Hachioji Tokyo192-0397 Japan Yukawa Institute for Theoretical Physics Kyoto University Sakyo Kyoto606-8502 Japan International Politics and Economics Nishogakusha University Chiyoda Tokyo102-8336 Japan Institute of Physics Unviversity of Tokyo Meguro Tokyo153-8902 Japan

We develop a dynamical model to describe critical fluctuations in heavy-ion collisions, incorporating the baryon diffusion current and chiral condensate as dynamical degrees of freedom, to address their nontrivial scale separation. The model couples fluctuations of the chiral condensate σ with baryon density fluctuations n and the diffusion current ν based on a second-order diffusion equation with a finite relaxation time of the baryon diffusion τR. We analyze the spacetime evolution and these correlation functions of the fluctuations in one-dimensionally expanding background. We confirm that an appropriate relaxation time τR ensures causality. We show that propagating waves with finite τR split into two modes at the critical temperature due to a rapid change of kinetic coefficients. In the correlation functions, we find that dynamical σ blurs the structure and peak around the critical temperature. With finite τR, the effect of the critical fluctuations persists longer into the later stages of the evolution. These findings suggest importance of dynamical effects of the chiral condensate and baryon diffusion current in identifying critical-point signals in heavy-ion collisions, where the scale separation is nontrivial. Copyright © 2025, The Authors. All rights reserved.

关键词： Heavy ions

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Confinement and magnetic field effect on chiral ferroelectric nematic in Grandjean-Cano wedge cells

arXiv

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arXiv 2024年

作者： Thapa, Kamal Iadlovska, Olena S. Basnet, Bijaya Wang, Hao Paul, Ayusha Gleeson, James T. Lavrentovich, Oleg D. Advanced Materials and Liquid Crystal Institute Kent State University KentOH44242 United States Department of Physics Kent State University KentOH44242 United States Materials Science Graduate Program Kent State University KentOH44242 United States

We explore the structure and magnetic field response of edge dislocations in Grandjean-Cano wedge cells filled with chiral mixtures of the ferroelectric nematic mesogen DIO. Upon cooling, the ordering changes from paraelectric in the cholesteric phase N*to antiferroelectric in the smectic SmZA*and to ferroelectric in the cholesteric NF*. Dislocations of the Burgers vector b equal the helicoidal pitch P are stable in all three phases, while dislocations with b=P/2 exist only in the N*and SmZA*. The b=P/2 dislocations split into pairs of τ-12λ+12 disclinations, while the thick dislocations b=P are pairs of nonsingular λ-12λ+12 disclinations. The polar order makes the τ-12 disclinations unstable in the NF*phase, as they should be connected to singular walls in the polarization field. We propose a model of transformation of the composite τ-12 line-wall defect into a nonsingular λ-12 disclination, which is paired up with a λ+12 line to form a b=P dislocation. The SmZA*behavior in the in-plane magnetic field is different from that of the NF*and N*: the dislocations show no zigzag instability, and the pitch remains unchanged in the magnetic fields up to 1 T. The behavior is associated with the finite compressibility of smectic layers. © 2024, CC BY.

关键词： Liquid crystals

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From food toxins to biomarkers: Multiplexed detection of aflatoxin B1 and aflatoxin M1 in milk and human serum using PEGylated ternary transition metal sulfides

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Sensors and Actuators Reports 2023年 5卷

作者： Yadav, Kanchan Moovendaran, Kalimuthu Dhenadhayalan, Namasivayam Lee, Shang-Fan Leung, Man-Kit Sankar, Raman Department of Chemistry National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei106 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei Taiwan Institute of Physics Academia Sinica Taipei11529 Taiwan

Aflatoxins (AF) are fungal toxins which not only contaminate food, but also adversely impact human health if consumed and serve as biomarkers for deadly diseases like liver cancer. Therefore, there is a strong need to develop ultra-sensitive AF detection method in physiological environments. In the present study, ternary transition metal sulfides single crystals (Mn0.02Ta3S6 and Fe0.65Ta3S6) were grown, exfoliated to thin layered nanosheets (NSs) followed by polyethylene-glycol modification (PEG@NSs). High fluorescence quenching abilities towards the aptamers for AF biosensing were demonstrated using PEGylated NSs. It has been observed that PEGylated NSs improves the detection sensitivity ∼ 248 times better than non-PEGylated NSs. Subsequently, multiplexed detections of aflatoxin B1 (AFB1) and M1 (AFM1) in diverse mediums including PBS buffer (1 ×), milk and human serum were performed by employing PEG@Mn0.02Ta3S6 NSs with TAMRA dye-labelled AFB1 aptamer and FAM dye-labelled AFM1 aptamer, respectively. The fluorescence intensity of designed sensor exhibited ultrasensitive detections (∼ pM) and a wide linear range (≥ 5 orders). Hence, the present study can serve as a unique platform for facile, ultra-sensitive, selective, cost-effective and quick multiplexed detection of food toxins and disease biomarkers in complex-matrix. © 2023

关键词： Polyethylene glycols

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Wavefront-selective Fano resonant metasurfaces

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Advanced Photonics 2021年第2期3卷 78-88页

作者： Adam Overvig Andrea Alù City University of New York Advanced Science Research CenterPhotonics InitiativeNew YorkUnited States City University of New York Graduate CenterPhysics ProgramNew YorkUnited States

Fano resonances are conventionally understood as sharp spectral features with selectivity in the momentum-frequency domain,implying that they can be excited only by plane waves with specific frequencies and incident *** demonstrate that Fano resonances can be made generally selective in the spacefrequency *** can be tailored to resonate only when excited by a frequency,polarization,and wavefront of *** generalization reveals that Fano systems are characterized by eigenwaves that scatter to their time-reversed image upon *** in conventional Fano systems this trivially occurs for normally incident plane waves,we show that,in general,the selected wavefront is locally retroreflected everywhere across the *** results show that conventional Fano resonances are a subset of a broader dichroic phenomenon with spin,spatial,and spectral *** demonstrate these concepts with nonlocal metasurfaces whose governing principles are deeply rooted in the symmetry features of quasi-bound states in the *** light–matter interactions and symmetry-protection make these phenomena uniquely suited for enriching applications in quantum optics,non-linear optics,augmented reality,and secure optical communications,laying the groundwork for a range of novel compact optical sources and devices.

关键词： nonlocal metasurface Fano resonance spatial selectivity quasi-bound states in the continuum

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