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Molecular Insights into Striking Antibody Evasion of SARS-CoV-2 Omicron Variant

Chinese Physics Letters 2022年第10期39卷 71-78页

作者： Zeng-Shuai Yan Yao Xu Hong-Ming Ding Yu-Qiang Ma National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Center for Soft Condensed Matter Physics and Interdisciplinary Research School of Physical Science and TechnologySoochow UniversitySuzhou 215006China

The SARS-CoV-2 Omicron variant has become the dominant variant in the *** the structural basis of altered immune response and enhanced transmission of Omicron is particularly ***,taking twenty-five antibodies from four groups as examples,we comprehensively reveal the underlying mechanism of how mutations in Omicron induces the weak neutralization by using molecular ***,the binding strength of 68%antibodies is weakened in Omicron,much larger than that in Delta(40%).Specifically,the percentage of the weakened antibodies vary largely in different ***,the mutation-induced repulsion is mainly responsive for the weak neutralization in AB/CD groups but does not take effect in EF ***,we demonstrate that the disappearance of hydrophobic interaction and salt bridges due to residue deletions contributes to the decreased binding energy in NTD *** work provides unprecedented atomistic details for the distinct neutralization of WT/Delta/Omicron,which informs prospective efforts to design antibodies/vaccines against Omicron.

关键词： Antibody details bridges

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Sub-nanotesla sensitivity at the nanoscale with a single spin

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National science Review 2023年第12期10卷 164-173页

作者： Zhiyuan Zhao Xiangyu Ye Shaoyi Xu Pei Yu Zhiping Yang Xi Kong Ya Wang Tianyu Xie Fazhan Shi Jiangfeng Du CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China National Laboratory of Solid State Microstructures and Department of Physics Nanjing University Hefei National Laboratory University of Science and Technology of China School of Biomedical Engineering and Suzhou Institute for Advanced Research University of Science and Technology of China

High-sensitivity detection of the microscopic magnetic field is essential in many *** sensitivity and high spatial resolution are mutually contradictory in measurement,which is quantified by the energy resolution *** we report that a sensitivity of 0.5 nT/(Hz)(1/2) at the nanoscale is achieved experimentally by using nitrogen-vacancy defects in diamond with depths of tens of *** achieved sensitivity is substantially enhanced by integrating with multiple quantum techniques,including real-time-feedback initialization,dynamical decoupling with shaped pulses and repetitive readout via quantum *** magnetic sensors will shed new light on searching new physics beyond the standard model,investigating microscopic magnetic phenomena in condensed matters,and detection of life activities at the sub-cellular scale.

关键词： magnetic sensitivity spatial resolution quantum sensing nanoscale energy resolution limit

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Moiré heterostructures:highly tunable platforms for quantum simulation and future computing

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Journal of Semiconductors 2023年第1期44卷 10-14页

作者： Moyu Chen Fanqiang Chen Bin Cheng Shi Jun Liang Feng Miao Institute of Brain-Inspired Intelligence National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210008China Institute of Interdisciplinary Physical Sciences School of ScienceNanjing University of Science and TechnologyNanjing 210094China

Moiré heterostructures, where the constituent 2D materials are stacked vertically at a small angle, feature longwavelength interference pattern at the van der Waals interfaces. One typical example is twisted bilayer graphene. In this moiré heterostructure, the emergence of moiré superlattices can effectively reconstruct the energy bands into dispersionless flat bands at a special twisted angle(so-called ‘magic angle’).

关键词： quantum twisted constituent

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Moiré Synaptic Transistor for Homogeneous-Architecture Reservoir Computing

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Chinese Physics Letters 2023年第11期40卷 100-107页

作者：王鹏飞陈墨雨谢永勤潘晨 Kenji Watanabe Takashi Taniguchi 程斌梁世军缪峰 Institute of Brain-Inspired Intelligence National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Institute of Interdisciplinary Physical Sciences School of ScienceNanjing University of Science and TechnologyNanjing 210094China Research Center for Functional Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan International Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan

Reservoir computing has been considered as a promising intelligent computing paradigm for effectively processing complex temporal *** tunable and reproducible dynamics in the single electronic device have been desired to implement the “reservoir” and the “readout” layer of reservoir computing ***-dimensional moiré materials,with an artificial lattice constant many times larger than the atomic length scale,are one type of most studied artificial quantum materials in community of material science and condensed-matter physics over the past *** materials are featured with gate-tunable periodic potential and electronic correlation,thus varying the electric field allows the electrons in the moiré potential per unit cell to exhibit distinct and reproducible dynamics,showing great promise in robust reservoir ***,we report that a moiré synaptic transistor can be used to implement the reservoir computing system with a homogeneous reservoir-readout *** synaptic transistor is fabricated based on an h-BN/bilayer graphene/h-BN moiré heterostructure,exhibiting ferroelectricity-like hysteretic gate voltage dependence of *** the magnitude of the gate voltage enables the moiré transistor to switch between long-term memory and shortterm memory with nonlinear *** employing the short-and long-term memories as the reservoir nodes and weights of the readout layer,respectively,we construct a full-moiré physical neural network and demonstrate that the classification accuracy of 90.8% can be achieved for the MNIST(Modified National Institute of Standards and technology) handwritten digits *** work would pave the way towards the development of neuromorphic computing based on moiré materials.

关键词： transistor tunable reservoir

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Highly Thermoconductive,Strong Graphene‑Based Composite Films by Eliminating Nanosheets Wrinkles

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Nano-Micro Letters 2024年第1期16卷 328-340页

作者： Guang Xiao Hao Li Zhizhou Yu Haoting Niu Yagang Yao College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNational Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China Institute of Laser Manufacturing Henan Academy of SciencesZhengzhou 450052People’s Republic of China Center for Quantum Transport and Thermal Energy Science School of Physics and TechnologyNanjing Normal UniversityNanjing 210023People’s Republic of China

Graphene-based thermally conductive composites have been proposed as effective thermal management materials for cooling high-power electronic ***,when flexible graphene nanosheets are assembled into macroscopic thermally conductive composites,capillary forces induce shrinkage of graphene nanosheets to form wrinkles during solution-based spontaneous drying,which greatly reduces the thermal conductivity of the ***,graphene nanosheets/aramid nanofiber(GNS/ANF)composite films with high thermal conductivity were prepared by in-plane stretching of GNS/ANF composite hydrogel networks with hydrogen bonds andπ-π*** in-plane mechanical stretching eliminates graphene nanosheets wrinkles by suppressing inward shrinkage due to capillary forces during drying and achieves a high in-plane orientation of graphene nanosheets,thereby creating a fast in-plane heat transfer *** composite films(GNS/ANF-60 wt%)with eliminated graphene nanosheets wrinkles showed a significant increase in thermal conductivity(146 W m^(−1)K^(−1))and tensile strength(207 MPa).The combination of these excellent properties enables the GNS/ANF composite films to be effectively used for cooling flexible LED chips and smartphones,showing promising applications in the thermal management of high-power electronic devices.

关键词： Graphene Aramid nanofiber Wrinkles elimination In-plane stretching Thermal conductivity

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Solar evaporation for simultaneous oil-water separation and electricity generation with Janus wood-based absorbers

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Frontiers of Environmental science & Engineering 2024年第2期18卷 13-23页

作者： Yue Yang Ze Fu Qi Zhang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science&TechnologyNanjing 210094China Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesKey Laboratory of Intelligent Optical Sensing and Manipulation(Ministry of Education)Jiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210093China

Oily wastewater from ocean oil spills endangers marine ecosystems and human health. Therefore, developing an effective and sustainable solution for separating oil-water mixtures is urgent. Interfacial solar photothermal evaporation is a promising approach for the complete separation of two-phase mixtures using only solar energy. Herein, we report a carbonized wood-based absorber with Janus structure of comprising a hydrophobic top-layer and an oleophobic bottom-layer for simultaneous solar-driven oil-water separation and electricity generation. Under sunlight irradiation, the rapid evaporation of seawater will induce a separation of oil-water mixtures, and cause a high salt concentration region underlying the interface, while the bottom “bulk water” maintains in a low salt concentration, thus forming a salinity gradient. Electricity can be generated by salinity gradient power. Therefore, oil-water separation efficiency of > 99% and derived extra electricity power of ~0.1 W/m2 is achieved under solar radiation, demonstrating the feasibility of oil-water separation and electricity production synchronously directly using solar energy. This work provides a green and cost-effective path for the separation of oil-water mixtures.

关键词： Oily wastewater Carbonized wood Salinity gradient Electricity generation Solar irradiation

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Multiscale structural engineering of carbon nitride for enhanced photocatalytic H2O2 production

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Nano Research 2023年第4期16卷 4524-4530页

作者： Qing He Bounxome Viengkeo Xuan Zhao Zhengyuan Qin Jie Zhang Xiaohan Yu Yongpan Hu Wei Huang Yanguang Li Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China National Laboratory of Solid State Microstructures School of Physicsand Collaborative Innovation Center for Advanced MicrostructuresNanjing UniversityNanjing 210093China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyMacao 999078China

Carbon nitride(C_(3)N_(4))holds great promise for photocatalytic H_(2)O_(2)production from oxygen *** spite of great research efforts,they still suffer from low catalytic efficiency primarily limited by the fast recombination of photogenerated charge *** this work,we report the multiscale structural engineering of C_(3)N_(4)to significantly improve its optoelectronic properties and consequently photocatalytic *** product consists of porous spheres with high surface areas,abundant nitrogen defects,and alkali metal *** visible light irradiation,our catalyst shows a remarkable H_(2)O_(2)production rate of 3,080μmol·g^(−1)·h^(−1),which is more than 10 times higher than that of bulk C_(3)N_(4)and exceeds those of most other C_(3)N_(4)-based ***,the catalyst exhibits great stability,and can continuously work for 15 h without obvious activity decay under visible light irradiation,eventually giving rise to a high H_(2)O_(2)concentration of ca.45 mM.

关键词： photocatalytic H_(2)O_(2)production oxygen reduction carbon nitride multiscale structural engineering

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Effective CO_(2)activation of enriched oxygen vacancies for photothermal CO_(2)methanation

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Journal of Materials science & technology 2024年第22期189卷 203-210页

作者： Peipei Du Guoqiang Deng Zhonghua Li Junchuan Sun Lu Wang Yongqiang Yang Jun Wang Yaguang Li Xiaoming Xu Yuanming Zhang Wangxi Liu Gang Liu Zhigang Zou Zhaosheng Li Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Jiangsu Key Laboratory of Nano Technology Nanjing UniversityNanjing 210093China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Research Center for Solar Driven Carbon Neutrality Engineering Research Center of Zero-carbon Energy Buildings and Measurement TechniquesMinistry of EducationThe College of Physics Science and TechnologyInstitute of Life Science and Green DevelopmentHebei UniversityBaoding 071002China

Oxygen vacancies have been widely concerned with the facilitation effects of CO_(2)activation for CO_(2)***,little attention has been paid to the generation of active intermediate species induced by enriched oxygen ***,we discovered that CeNiO_(3−δ)catalyst enriched oxygen vacancies can efficiently activate CO_(2)and realize high activity for photothermal CO_(2)*** situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)proved that oxygen vacancies are beneficial to the formation of reactive intermediate species of polydentate carbonate over CeNiO_(3−δ),which is crucial for efficient CO_(2)*** results revealed mechanistic insights into how effective CO_(2)activation induced by oxygen vacancies can be manipulated by adjusting the adsorption intermediate species.

关键词： Oxygen vacancies CO_(2)activation Active intermediate species Photo-thermal CO_(2)methanation CeNiO_(3)

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A spin-based magnetic scanning microscope for in-situ strain tuning of soft matter

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Chinese Physics B 2023年第5期32卷 102-107页

作者：丁哲孙豫蒙王孟祺余佩郑宁冲臧一鹏王鹏飞王亚聂越峰石发展杜江峰 CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing UniversityNanjing 210093China College of Engineering and Applied Science Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China School of Biomedical Engineering and Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China

We present a magnetic scanning microscope equipped with a nitrogen-vacancy(NV) center scanning probe that has the ability to mechanically tune the strain of soft matter in-situ. The construction of the microscope and a continuous straintuning sample holder are discussed. An optically detected magnetic resonance protocol utilized in the imaging is *** order to show the reliability of this microscope, the strain conduction is estimated with finite element simulation, and xray diffraction is required for calibration when freestanding crystal films are under consideration. A magnetic imaging result is displayed to demonstrate the nano-scale imaging capability. The microscope presented in this work is helpful in studying strain-coupled magnetic physics such as magnetic phase transition under strain and strain-tuned cycloidal orientation tilting.

关键词： nitrogen-vacancy(NV)center antiferromagnetism strain tuning soft matter

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Enhanced visible-light photocatalytic hydrogen evolution using two-dimensional carbon nitride sheets with the removal of amine groups

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Chinese Chemical Letters 2024年第2期35卷 446-450页

作者： Yu Zhang Liting Wu Shaopeng Wang Dingyi Yang Huan Liang Yizhang Wu Jian Hao Youqing Wang Jianke Liu Yong Wang Department of Physics Shaanxi University of Science and TechnologyXi'an 710021China School of Advanced Materials and Nanotechnology Academy of Advanced Interdisciplinary ResearchXidian UniversityXi'an 710126China The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Xidian UniversityXi'an 710126China Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

Two-dimensional(2D)carbon nitride sheets(CNs)with atomically thin structures are regarded as one of the most promising materials for solar energy ***,due to their substantially enlarged bandgap caused by the strong quantum size effect and their incomplete polymerisation with a large number of non-condensed surface amino groups,the practical applicability of CNs in photocatalysis is *** this study,CNs with broad visible-light absorption were synthesised using a 5-min fast thermal *** removal of uncondensed amine groups reduces the bandgap of CNs from 3.06 eV to 2.60 eV,increasing their absorption of visible ***,the CNs were distorted after annealing,which can differentiate the spatial positions of electrons and holes,enhancing the visible-light absorption *** a result,when exposed to visible light,the photocatalytic hydrogen production activity of atomically thin 2D CNs rose by 8.38 *** research presents a dependable and speedy method for creating highly effective visible-light photocatalysts with narrowed bandgaps and improved visible-light absorption.

关键词： 2D carbon nitride sheets Rapid thermal annealing DFT calculations Visible-light absorption visible-light photocatalysis

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