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Colorimetric detection of fluoroquinolones via MOF inhibition and thiol-response oxidase-mimicking reactions

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Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy 2025年 340卷 126347页

作者： Zhang, Wenzhi Liu, Song Wang, Henggang Wang, Zhe Cui, Linfeng Fu, Nian Wang, Zhenguang Hebei Technology Innovation Center for Energy Conversion Materials and Devices Hebei Key Laboratory of Inorganic Nanomaterials Engineering Research Center of Thin Film Solar Cell Materials and Devices College of Chemistry and Material Science Hebei Normal University No. 20Rd. East of 2nd Ring South Yuhua District Hebei Shijiazhuang050024 China Key Laboratory of Medicinal Chemistry and Molecular Diagnosis Ministry of Education College of Chemistry & Materials Science Hebei University Baoding071002 China Hebei Key Laboratory of Photo-Electricity Information and Materials Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College of Physics Science and Technology Hebei University Baoding071002 China

Developing a selective colorimetric assay for fluoroquinolones (FQs) that show visible color response is highly desired, which is challenging because FQs show extremely similarity in structure and inherently absorb light in the UV color range. In this work, a selective colorimetric assay for pefloxacin (PEF) was fabricated through integrating two rection systems: the inhibition effects of PEF on the AChE-like activities of Al3+ decorated MOF-808 (MOF-808-Al) and the thiol-response oxidase-mimicking reaction of MnO2 nanosheets. The MnO2 nanosheets, due to their oxidase-mimicking properties, can oxidize the colorless 3, 3′, 5, 5′-tetramethylbenzidine (TMB) into its blue-colored oxidized form, TMB+. Assisted by the synergistic action of metal–OH and Lewis acid sites, MOF-808-Al exhibits AChE-like activities. These activities catalyze the decomposition of acetylthiocholine into thiocholine. Thiocholine has a stronger reactivity compared to TMB;it can reduce the MnO2 nanosheets, which in turn prevents the color response. In addition, PEF inhibits the AChE-like activities of MOF-808-Al by blocking its active sites. The quantitative detection of PEF is accomplished by recording the blue color response of the system, both in buffer solutions and in commercial meat samples. This assay demonstrates excellent tolerance and selectivity against various interfering substances, antibiotics, and pesticides. © 2025 Elsevier B.V.

关键词： Nanosheets

Charge instability of topological Fermi arcs in chiral crystal CoSi

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arXiv 2021年

作者： Rao, Zhicheng Hu, Quanxin Tian, Shangjie Gao, Shunye Yuan, Zhenyu Tang, Cenyao Fan, Wenhui Huang, Jierui Huang, Yaobo Wang, Li Zhang, Lu Li, Fangsen Yang, Huaixin Weng, Hongming Qian, Tian Xu, Jinpeng Jiang, Kun Lei, Hechang Sun, Yu-Jie Ding, Hong Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Department of Physics Beijing Key Laboratory of Opto-Electronic Functional Materials & Micronano Devices Renmin University of China Beijing100872 China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai201204 China Suzhou215123 China Songshan Lake Materials Laboratory Guangdong Dongguan523808 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing100190 China Department of Physics Southern University of Science and Technology Shenzhen518055 China

Topological boundary states, emerged at the spatial boundary between topological non-trivial and trivial phases, are usually gapless, or commonly referred as metallic states. For example, the surface state of a topological insulator is a gapless Dirac state1-3. These metallic topological boundary states are typically well described by non-interacting fermions1-5. However, the behavior of topological boundary states with significant electron-electron interactions, which could turn the gapless boundary states into gapped ordered states, e.g., density wave states or superconducting states, is of great interest theoretically, but is still lacking evidence experimentally14-18. Here, we report the observation of incommensurable charge density wave (CDW) formed on the topological boundary states driven by the electron-electron interactions on the (001) surface of CoSi. The wavevector of CDW varies as the temperature changes, which coincides with the evolution of topological surface Fermi arcs with temperature. The orientation of CDW phase is determined by the chirality of the Fermi arcs, which indicates direct association between CDW and Fermi arcs. Our finding will stimulate the search of more interactions-driven ordered states, such as superconductivity and magnetism, on the boundaries of topological materials. Copyright © 2021, The Authors. All rights reserved.

关键词： Charge density waves

Intriguing magnetism of the topological kagome magnet TbMn6Sn6

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arXiv 2021年

作者： Mielke, C. Ma, W. Pomjakushin, V. Zaharko, O. Sturniolo, S. Liu, X. Ukleev, V. White, J.S. Yin, J.-X. Tsirkin, S.S. Larsen, C.B. Cochran, T.A. Medarde, M. Porée, V. Das, D. Gupta, R. Wang, C.N. Chang, J. Wang, Z.Q. Khasanov, R. Neupert, T. Amato, A. Liborio, L. Jia, S. Hasan, M.Z. Luetkens, H. Guguchia, Zurab Laboratory for Muon Spin Spectroscopy Paul Scherrer Institute PSI Villigen CH-5232 Switzerland Department of Physics University of Zürich Winterthurerstrasse 190 Zurich Switzerland International Center for Quantum Materials School of Physics Peking University Beijing China Laboratory for Neutron Scattering and Imaging Paul Scherrer Institut PSI Villigen CH-5232 Switzerland Scientific Computing Department Science & Technology Facilities Council Rutherford Appleton Laboratory DidcotOX11 0QX United Kingdom Laboratory for Topological Quantum Matter and Spectroscopy Department of Physics Princeton University PrincetonNJ08544 United States Laboratory for Multiscale Materials Experiments Paul Scherrer Institut PSI Villigen CH-5232 Switzerland Department of Physics Boston College Chestnut HillMA United States CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Science Beijing China

Magnetic topological phases of quantum matter are an emerging frontier in physics and material science1-10. Along these lines, several kagome magnets have appeared as the most promising platforms. Here, we explore magnetic correlations in the transition-metal-based kagome magnet TbMn6Sn6 using muon spin rotation, combined with local field analysis and neutron diffraction17. Our results show that the system exhibits an out-of-plane ferrimagnetic structure P6/mm'm' (comprised by Tb and Mn moments) with slow magnetic fluctuations below (Equation presented). These fluctuations exhibit a slowing down below (Equation presented). K, and we see the formation of static patches with ideal out-of-plane order below (Equation presented). which grow in a volume with decreasing temperature. The appearance of the static patches has a similar onset to the interesting phenomenon such as spin-polarized Dirac dispersion with a large Chern gap and topological edge states. We further show that the temperature evolution of the anomalous Hall conductivity (AHC) is strongly influenced by the low temperature magnetic crossover. Our presented experimental results show that the onset of the topological electronic properties tied to the Dirac band is promoted only by true static out-of-plane ferrimagnetic order in TbMn6Sn6 and is washed out by the slow magnetic fluctuations above (Equation presented). Remarkably, hydrostatic pressure of 2.1 GPa stabilises static out-of-plane topological ferrimagnetic ground state in the whole volume of the sample. Therefore the exciting perspective arises of a magnetic system in which the topological response can be controlled, and thus explored, over a wide range of parameters. Copyright © 2021, The Authors. All rights reserved.

关键词： Manganese alloys

Generalization of group-theoretic coherent states for variational calculations

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Physical Review Research 2021年第2期3卷 023090-023090页

作者： Tommaso Guaita Lucas Hackl Tao Shi Eugene Demler J. Ignacio Cirac Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1 85748 Garching Germany Munich Center for Quantum Science and Technology Schellingstr. 4 80799 Munich Germany School of Mathematics and Statistics & School of Physics The University of Melbourne Parkville VIC 3010 Australia QMATH Department of Mathematical Sciences University of Copenhagen Universitetsparken 5 2100 Copenhagen Denmark CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100049 China Lyman Laboratory Department of Physics Harvard University 17 Oxford St. Cambridge Massachusetts 02138 USA

We introduce families of pure quantum states that are constructed on top of the well-known Gilmore-Perelomov group-theoretic coherent states. We do this by constructing unitaries as the exponential of operators quadratic in Cartan subalgebra elements and by applying these unitaries to regular group-theoretic coherent states. This enables us to generate entanglement not found in the coherent states themselves, while retaining many of their desirable properties. Most importantly, we explain how the expectation values of physical observables can be evaluated efficiently. Examples include generalized spin-coherent states and generalized Gaussian states, but our construction can be applied to any Lie group represented on the Hilbert space of a quantum system. We comment on their applicability as variational families in condensed matter physics and quantum information.

关键词： Mean field theory Nonperturbative methods Semiclassical methods Variational approach

Precisely Manipulating Molecular Packing via Tuning Alkyl Side-Chain Topology Enabling High-Performance Nonfused-Ring Electron Acceptors

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Angewandte Chemie 2024年第10期136卷

作者： Ziyang Han Cai'e Zhang Tengfei He Jinhua Gao Yuqi Hou Xiaobin Gu Jikai Lv Na Yu Jiawei Qiao Sixuan Wang Congqi Li Prof. Jianqi Zhang Prof. Zhixiang Wei Prof. Qian Peng Prof. Zheng Tang Prof. Xiaotao Hao Prof. Guankui Long Prof. Yunhao Cai Prof. Xin Zhang Prof. Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics Engineering CAS Center for Excellence in Topological Quantum Computation CAS Key Laboratory of Vacuum Physics University of Chinese Academy of Sciences Beijing 100049 China School of Materials Science and Engineering National Institute for Advanced Materials Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300350 China Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China School of Physics School of Physics Shandong University Jinan Shandong 250100 China Center for Excellence in Nanoscience (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS) National Center for Nanoscience and Technology Beijing 100190 China School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China

In the development of high-performance organic solar cells (OSCs), the self-organization of organic semiconductors plays a crucial role. This study focuses on the precisely manipulation of molecular assemble via tuning alkyl side-chain topology in a series of low-cost nonfused-ring electron acceptors (NFREAs). Among the three NFREAs investigated, DPA-4, which possesses an asymmetric alkyl side-chain length, exhibits a tight packing in the crystal and high crystallinity in the film, contributing to improved electron mobility and favorable film morphology for DPA-4. As a result, the OSC device based on DPA-4 achieves an excellent power conversion efficiency of 16.67 %, ranking among the highest efficiencies for NFREA-based OSCs.

关键词： Alkyl Side-Chains Molecular Packing Nonfused-Ring Electron Acceptors Solar Cells

Visualizing Van der Waals Epitaxial Growth of Two-Dimensional Heterostructures

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arXiv 2021年

作者： Zhang, Kenan Ding, Changchun Pan, Baojun Wu, Zhen Marga, Austin Zhang, Lijie Zeng, Hao Huang, Shaoming Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices School of Materials and Energy Guangdong University of Technology Guangzhou510006 China Department of Physics University of Buffalo BuffaloNY14260 United States Key Laboratory of Carbon Materials of Zhejiang Province Institute of New Materials and Industrial Technologies College of Chemistry and Materials Engineering Wenzhou University Wenzhou325035 China Key Laboratory of High-Performance Scientific Computation School of Science Xihua University Chengdu610039 China

Understanding the growth mechanisms of two-dimensional (2D) van der Waals (vdW) heterostructures is of great importance in exploring their functionalities and device applications. A custom-built system integrating physical vapor deposition and optical microscopy/Raman spectroscopy was employed to study the dynamic growth processes of 2D vdW heterostructures in situ. This allows us to identify a new growth mode with a distinctly different growth rate and morphology from those of the conventional linear growth mode. We propose a model that explains the difference in morphologies and quantifies the growth rates of the two modes by taking the role of surface diffusion into account. We have systematically investigated a range of material combinations including CdI2/WS2, CdI2/MoS2, CdI2/WSe2, PbI2/WS2, PbI2/MoS2, PbI2/WSe2 and Bi2Se3/WS2. These findings may be generalized to the synthesis of many other 2D heterostructures with controlled morphologies and physical properties, benefiting future device applications. © 2021, CC BY.

关键词： Van der Waals forces

Spectroscopic evidence for the realization of a genuine topological nodal-line semimetal in LaSbTe

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Physical Review B 2021年第12期103卷 125131-125131页

作者： Yang Wang Yuting Qian Meng Yang Hongxiang Chen Cong Li Zhiyun Tan Yongqing Cai Wenjuan Zhao Shunye Gao Ya Feng Shiv Kumar Eike F. Schwier Lin Zhao Hongming Weng Youguo Shi Gang Wang Youting Song Yaobo Huang Kenya Shimada Zuyan Xu X. J. Zhou Guodong Liu Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China School of Materials Science and Engineering Fujian University of Technology Fuzhou 350118 China School of Physics and Electronic Science Zunyi Normal College Zunyi 563006 China Beijing Academy of Quantum Information Sciences Beijing 100193 China Hiroshima Synchrotron Radiation Center Hiroshima University Higashi-Hiroshima Hiroshima 739-0046 Japan Experimentelle Physik VII Universität Würzburg Am Hubland D-97074 Würzburg Germany European Union Songshan Lake Materials Laboratory Dongguan 523808 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Science Beijing 100190 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 China Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China

The nodal line semimetals have attracted much attention due to their unique topological electronic structure and exotic physical properties. A genuine nodal-line semimetal is qualified by the presence of Dirac nodes along a line in the momentum space that are protected against the spin-orbit coupling. In addition, it requires that the Dirac points lie close to the Fermi level, allowing one to dictate the macroscopic physical properties. Although the material realization of nodal-line semimetals have been theoretically predicted in numerous compounds, only a few of them have been experimentally verified and the realization of a genuine nodal-line semimetal is particularly rare. Here we report the realization of a genuine nodal-line semimetal in LaSbTe. We investigated the electronic structure of LaSbTe by band structure calculations and angle-resolved photoemission (ARPES) measurements. Taking spin-orbit coupling into account, our band structure calculations predict that a nodal line is formed in the boundary surface of the Brillouin zone, which is robust and lies close to the Fermi level. The Dirac nodes along the X-R line in momentum space are directly observed in our ARPES measurements, and the energies of these Dirac nodes are all close to the Fermi level. These results constitute clear evidence that LaSbTe is a genuine nodal-line semimetal, providing a platform to explore for novel phenomena and possible applications associated with the nodal-line semimetals.

关键词： First-principles calculations Symmetry protected topological states Node-line semimetals Angle-resolved photoemission spectroscopy

Sensitive single-photon test of extended quantum theory with two-dimensional hexagonal boron nitride

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Physical Review Research 2021年第1期3卷 013296-013296页

作者： Tobias Vogl Heiko Knopf Maximilian Weissflog Ping Koy Lam Falk Eilenberger Institute of Applied Physics Abbe Center of Photonics Friedrich-Schiller-Universität Jena 07745 Jena Germany Cavendish Laboratory University of Cambridge JJ Thomson Avenue Cambridge CB3 0HE United Kingdom Fraunhofer-Institute for Applied Optics and Precision Engineering IOF 07745 Jena Germany Max Planck School of Photonics 07745 Jena Germany Centre for Quantum Computation and Communication Technology Department of Quantum Science Research School of Physics and Engineering The Australian National University Acton ACT 2601 Australia

Quantum theory is the foundation of modern physics. Some of its basic principles, such as Born's rule, however, are based on postulates which require experimental testing. Any deviation from Born's rule would result in higher-order interference and can thus be tested in an experiment. Here, we report on such a test with a quantum light source based on a color center in hexagonal boron nitride (hBN) coupled to a microcavity. Our room-temperature photon source features a narrow-linewidth, high-efficiency, high-purity, and on-demand single-photon generation. With the single-photon source we can increase the interferometric sensitivity of our three-path interferometer compared to conventional laser-based light sources by fully suppressing the detector nonlinearity. We thereby obtain a tight bound on the third-order interference term of 3.96(523)×10−4. We also measure an interference visibility of 98.58% for our single photons emitted from hBN at room temperature, which provides a promising route for using the hBN platform as light source for phase-encoding schemes in quantum key distribution.

关键词： Optical tests of quantum theory Optics & lasers Quantum communication Optical microcavities

Omg Blueprint for trapped ion quantum computing with metastable states

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arXiv 2021年

作者： Allcock, D.T.C. Campbell, Wesley C. Chiaverini, J. Chuang, I.L. Hudson, E.R. Moore, I.D. Ransford, A. Roman, C. Sage, J.M. Wineland, D.J. Department of Physics University of Oregon EugeneOR United States Department of Physics and Astronomy University of California Los Angeles Los AngelesCA United States Center for Quantum Science and Engineering University of California Los Angeles Los AngelesCA United States Challenge Institute for Quantum Computation University of California Los Angeles Los AngelesCA United States Lincoln Laboratory Massachusetts Institute of Technology LexingtonMA United States Massachusetts Institute of Technology CambridgeMA United States Center for Ultracold Atoms Department of Electrical Engineering and Computer Science Department of Physics Massachusetts Institute of Technology CambridgeMA United States Honeywell Quantum Solutions BroomfieldCO United States

Quantum computers, much like their classical counterparts, will likely benefit from flexible qubit encodings that can be matched to different tasks. For trapped ion quantum processors, a common way to access multiple encodings is to use multiple, co-trapped atomic species. Here, we outline an alternative approach that allows flexible encoding capabilities in single-species systems through the use of long-lived metastable states as an effective, programmable second species. We describe the set of additional trapped ion primitives needed to enable this protocol and show that they are compatible with large-scale systems that are already in operation. © 2021, CC BY.

关键词： Trapped ions