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Observation of high ionic conductivity of polyelectrolyte microgels in salt-free solutions

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Chinese Chemical Letters 2024年第4期35卷 255-259页

作者： Qiangwei Wang Huijiao Liu Mengjie Wang Haojie Zhang Jianda Xie Xuanwei Hu Shiming Zhou Weitai Wu State Key Laboratory for physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsThe Key Laboratory for Chemical Biology of Fujian Provinceand Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Materials Science and Engineering Xiamen University of TechnologyXiamen 361024China hefei national Laboratory for physical sciences at the microscale University of Science and Technology of ChinaHefei 230026China School of Chemistry and Chemical Engineering Ningxia UniversityYinchuan 750021China

Here, we report an observation that illustrate the potential of polyelectrolyte microgels in salt-free solutions to display a high ionic conductivity. Laser light scattering and ionic conductivity tests on very dilute aqueous dispersions of the microgels indicate that both small size and swollen state of gel particles play vital roles, which should favor the counterions to freely penetrate and leave gel particles, and thus can contribute to the ion-conducting property. Upon discovering this on microgels that are composed of imidazolium-based poly(ionic liquid), we also illustrate the generality of the finding to single lithium-ion polyelectrolyte microgels that are of more technically relevant features for applications, for instance, as injectable liquid “microgel-in-solution” electrolytes of high conductivity(ca. 8.2 × 10^(-2)S/m at 25.0 ℃ for1.0 × 10^(-2)g/m L of microgels in a LiNO_(3)-free 1:1 v/v mixture of 1,2-dioxolane and dimethoxymethane) and high lithium-ion transference number(0.87) for use in the rechargeable lithium-sulfur battery.

关键词： Polyelectrolhyte Stimuli-responsive Single-ion conducting Liquid electrolyte Lithium metal battery

Boson star superradiance

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 69-78页

作者： He-Yu Gao Paul M.Saffin Yi-Jie Wang Qi-Xin Xie Shuang-Yong Zhou School of physical sciences University of Science and Technology of ChinaHefei 230026China School of Physics and Astronomy University of NottinghamUniversity ParkNottingham NG72RDUK Interdisciplinary center for Theoretical Study University of Science and Technology of ChinaHefei 230026China Peng Huanwu center for Fundamental Theory Hefei 230026China

Recently,it has been realized that in some systems internal space rotation can induce energy amplification for scattered waves,similar to rotation in real *** particularly,it has been shown that energy extraction is possible for a Q-ball,a stationary non-topological soliton that is coherently rotating in its field *** this paper,we generalize the analysis to the case of boson stars,and show that the same energy extraction mechanism still works for boson stars.

关键词： superradiance boson star field space rotation

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二维碱金属金化物双金属烯半导体

Science China Materials 2024年第4期67卷 1209-1216页

作者：张凯吕海峰武晓君杨金龙 School of Chemistry and Materials sciences CAS Key Lab of Materials for Energy ConversionKey Laboratory of Precision and Intelligent ChemistryCollaborative Innovation Center of Chemistry for Energy Material(iChEM)and CAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230026China hefei national research center of physical sciences at the microscale University of Science and Technology of ChinaHefei 230026China

将不同金属元素通过合金化形成二维材料(金属烯)对基础研究和纳米电子器件的实际应用具有重要意义,但目前鲜有金属烯材料是具有本征带隙的半导体.受离子晶体成键特征的启发,通过结构搜索、成键分析和高通量第一性原理计算,本文从2500多... 详细信息

将不同金属元素通过合金化形成二维材料(金属烯)对基础研究和纳米电子器件的实际应用具有重要意义,但目前鲜有金属烯材料是具有本征带隙的半导体.受离子晶体成键特征的启发,通过结构搜索、成键分析和高通量第一性原理计算,本文从2500多个双金属烯中筛选出一系列具有晶格动力学稳定和碱金属-金离子键的二维碱金属金化物双金属烯半导体.由于碱金属和金之间的大电负性差,其中32个碱金属金化物双金属烯是带隙范围为0.97~5.20 eV的半导体材料,而锂金双金属烯由于电负性差减小呈现出金属性.Bohn-Oppenheimer分子动力学模拟表明19个双金属烯在室温下结构稳定有利于实际应用.这项研究为设计双金属烯半导体提供了指导,并揭示了二维金属合金中成键行为和电子结构性质间的关联.

关键词：电负性差晶格动力学金属性成键特征双金属第一性原理计算离子晶体半导体材料

NIR-II fluorescence imaging in liver tumor surgery: A narrative review

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Journal of Innovative Optical Health sciences 2024年第1期17卷 29-44页

作者： Zihao Liu Lifeng Yan Qingsong Hu Dalong Yin Department of General Surgery Anhui Provincial Hospital Anhui Medical UniversityHefei 230001P.R.China Department of Hepatobiliary Surgery and Centre for Leading Medicine and Advanced Technologies of IHM The First A±liated Hospital of USTC Division of Life sciences and Medicine University of Science and Technology of China hefei Anhui 230001P.R.China hefei national Laboratory for physical sciences at the microscale CAS Key Laboratory of Soft Matter Chemistry and Department of Chemical Physics University of Science and Technology of China Hefei 230026P.R.China Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery The First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of ChinaHefei 230001P.R.China

In liver tumor surgery,the recognition of tumor margin and radical resection of microcancer focis have always been the crucial points to reduce postoperative recurrence of ***,naked-eye inspection and palpation have limited effectiveness in identifying tumor boundaries,and traditional imaging techniques cannot consistently locate tumors in real *** an intraoperative real-time navigation imaging method,NIRfluorescence imaging has been extensively studied for its simplicity,reliable safety,and superior sensitivity,and is expected to improve the accuracy of liver tumor *** recent years,the research focus of NIRfluorescence has gradually shifted from the-rst near-infrared window(NIR-I,700–900 nm)to the second near-infrared window(NIR-II,1000–1700 nm).Fluorescence imaging in NIR-II reduces the scattering effect of deep tissue,providing a preferable detection depth and spatial resolution while signi-cantly eliminating liver autofluorescence background to clarify tumor *** combined with tumor antibodies will further improve the precision offluorescence-guided surgical *** the development of a bunch offluorophores with phototherapy ability,NIR-II can integrate tumor detection and treatment to explore a new therapeutic strategy for liver ***,we review the recent progress of NIR-IIfluorescence technology in liver tumor surgery and discuss its challenges and potential development direction.

关键词： Fluorescence guided-surgery liver cancer near infrared-II optical imaging

通过从头算非绝热分子动力学研究1T-VSe_(2)中的光激发诱导自旋动力学

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Science China Materials 2024年第4期67卷 1253-1259页

作者：陈林杰郑镇法郑奇靖李群祥赵瑾 Department of Chemical Physics School of ChemistryUniversity of Science and Technology of ChinaHefei 230026China Department of Physics and ICQD/hefei national research center for physical sciences at the microscale University of Science and Technology of ChinaHefei 230026China hefei national Laboratory University of Science and Technology of ChinaHefei 230088China Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of ChinaHefei 230026China

利用光激发来操控二维材料中的磁矩是实现光自旋电子学器件的基础.本工作中,我们利用从头算非绝热分子动力学模拟,研究了光激发如何改变二维铁磁金属VSe_(2)中的磁矩.我们发现自旋-轨道耦合作用和声子激发导致了自旋向上和自旋向下电子... 详细信息

利用光激发来操控二维材料中的磁矩是实现光自旋电子学器件的基础.本工作中,我们利用从头算非绝热分子动力学模拟,研究了光激发如何改变二维铁磁金属VSe_(2)中的磁矩.我们发现自旋-轨道耦合作用和声子激发导致了自旋向上和自旋向下电子态发生混合,并在费米能级以上1.0 eV附近形成了一个自旋混合区.当自旋向上或向下的电子在弛豫过程中经过这个混合区时,它们会丢失原有的自旋方向.当电子从费米面以上2.0 eV左右向下弛豫时,自旋向下的电子发生带内弛豫,而自旋向上的电子发生带间弛豫.因此,自旋向下电子的弛豫速度比自旋向上电子高出约一个数量级.这种自旋向上和自旋向下电子的动态行为差异导致了VSe_(2)的磁矩在光激发后10 fs内先增大,这对应了自旋向下电子失去了原始的自旋方向;随后,磁矩在100 fs内减小,这对应了自旋向上电子失去了原始自旋的方向;最后,系统的总磁矩在皮秒的时间尺度内逐渐恢复到光激发前的水平.这项工作为我们了解光激发如何操控二维材料的磁性提供了理论依据.

关键词：从头算弛豫过程费米面费米能级电子态自旋动力学二维材料非绝热

Larger in-plane upper critical field and superconducting diode effect observed in topological superconductor candidate InNbS_(2)nanoribbons

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Nano research 2024年第7期17卷 6686-6694页

作者： Bo Zheng Changlong Wang Xukun Feng Xiaozhen Sun Shasha Wang Dawei Qiu Xiang Ma Ruimin Li Guanglei Cheng Lan Wang Yalin Lu Peng Li Shengyuan A.Yang Bin Xiang Department of Materials Science and Engineering CAS Key Lab of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China research Laboratory for Quantum Materials Singapore University of Technology and DesignSingapore 487372Singapore School of Microelectronics University of Science and Technology of ChinaHefei 230052China CAS Key Laboratory of microscale Magnetic Resonance and School of physical sciences University of Science and Technology of ChinaHefei 230026China Lab of Low Dimensional Magnetism and Spintronic Devices School of PhysicsHefei University of TechnologyHefei 230009China research Laboratory for Quantum Materials IAPMEUniversity of MacaoMacaoChina

Recently,the coexistence of topology and superconductivity has garnered considerable ***,the dimensionality of these materials is crucial for the realization of topological quantum ***,the naturally grown materials,especially with one-dimensional feature that exhibits the coexistence of topology and superconductivity,still face challenges in terms of experimental realization and scalability,which hinders the fundamental research development and the potential to revolutionize quantum ***,we report the first experimental synthesis of quasi-one-dimensional InNbS_(2)nanoribbons that exhibit the coexistence of topological order and superconductivity via a chemical vapor transport ***,the inplane upper critical field of InNbS_(2)nanoribbons exceeds the Pauli paramagnetic limit by more than 2.2 times,which can be attributed to the enhanced spin-orbit coupling and the weakened interlayer interaction between the NbS_(2)layers induced by the insertion of In atoms,making InNbS_(2)exhibit spin-momentum locking similar to that of monolayer NbS_(2).Moreover,for the first time,we report the superconducting diode effect in a quasi-one-dimensional superconductor system without any inherent geometric *** measured maximum efficiency is manifested as 14%,observed atμ0H≈±60 mT,and we propose that the superconducting diode effect can potentially be attributed to the presence of the nontrivial topological *** work provides a platform for studying exotic phenomena in condensed matter physics and potential applications in quantum computing and quantum information processing.

关键词： topological order superconductivity nanoribbon superconducting anisotropy superconducting diode

CSPP1 stabilizes microtubules by capping both plus and minus ends

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Journal of Molecular Cell Biology 2024年第2期16卷 36-46页

作者： Zhikai Wang Wenwen Wang Shuaiyu Liu Fengrui Yang Xu Liu Shasha Hua Lĳuan Zhu Aoqing Xu Donald LHill Dongmei Wang Kai Jiang Jennifer Lippincott-Schwartz Xing Liu Xuebiao Yao MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics Center for Advanced Interdisciplinary Science and Biomedicine of IHMUniversity of Science and Technology of China School of Life SciencesHefei 230027China Anhui Key Laboratory for Cellular Dynamics and Chemical Biology Hefei National Research Center for Interdisciplinary Sciences at the MicroscaleHefei 230027China Frontier Science center for Immunology and Metabolism Medical Research InstituteWuhan UniversityWuhan 430071China Comprehensive Cancer center University of AlabamaBirminghamAL 35233USA Janelia research Campus Howard Hughes Medical InstituteAshburnVA 20147USA

Although the dynamic instability of microtubules(MTs)is fundamental to many cellular functions,quiescent MTs with unattached free distal ends are commonly present and play important roles in various events to power cellular ***,how these free MT tips are stabilized remains poorly ***,we report that centrosome and spindle pole protein 1(CSPP1)caps and stabilizes both plus and minus ends of static ***-time imaging of laser-ablated MTs in live cells showed deposition of CSPP1 at the newly generated MT ends,whose dynamic instability was concomitantly ***,MT ends in CSPP1-overexpressing cells were hyper-stabilized,while those in CSPP1-depleted cells were much more *** CSPP1-elicited stabilization of MTs was demonstrated to be achieved by suppressing intrinsic MT catastrophe and restricting ***,CSPP1-bound MTs were resistant to mitotic centromere-associated kinesin-mediated *** findings delineate a previously uncharacterized CSPP1 activity that integrates MT end capping to orchestrate quiescent MTs.

关键词： CSPP1 microtubule plus end minus end capping

The interaction between KIF21A and KANK1 regulates dendritic morphology and synapse plasticity in neurons

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Neural Regeneration research 2025年第1期20卷 209-223页

作者： Shi-Yan Sun Lingyun Nie Jing Zhang Xue Fang Hongmei Luo Chuanhai Fu Zhiyi Wei Ai-Hui Tang hefei national research center for physical sciences at the microscale CAS Key Laboratory of Brain Function and DiseaseMinistry of Education Key Laboratory for Membrane-less Organelles and Cellular DynamicsDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina CAS center for Excellence in Molecular Cell sciences Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Neurobiology School of Life SciencesSouthern University of Science and TechnologyShenzhenGuangdong ProvinceChina Brain research center Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina

Morphological alterations in dendritic spines have been linked to changes in functional communication between neurons that affect learning and ***-4 KIF21A helps organize the microtubule-actin network at the cell cortex by interacting with KANK1;however,whether KIF21A modulates dendritic structure and function in neurons remains *** this study,we found that KIF21A was distributed in a subset of dendritic spines,and that these KIF21A-positive spines were larger and more structurally plastic than KIF21A-negative ***,the interaction between KIF21A and KANK1 was found to be critical for dendritic spine morphogenesis and synaptic *** of either KIF21A or KANK1 inhibited dendritic spine morphogenesis and dendritic branching,and these deficits were fully rescued by coexpressing full-length KIF21A or KANK1,but not by proteins with mutations disrupting direct binding between KIF21A and KANK1 or binding between KANK1 and *** down KIF21A in the hippocampus of rats inhibited the amplitudes of long-term potentiation induced by high-frequency stimulation and negatively impacted the animals’cognitive *** together,our findings demonstrate the function of KIF21A in modulating spine morphology and provide insight into its role in synaptic function.

关键词： actin cytoskeleton dendrite KANK1 KIF21A microtubule spine morphology spine synaptic plasticity talin1

碱金属阳离子对硝酸根还原产氨反应的元素依赖性影响

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Science Bulletin 2024年第8期69卷 1100-1108页

作者：张意达马镇涛杨绍康王青雨刘利民柏彧饶德伟王功名李洪良郑旭升 national Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China hefei national research center for physical sciences at the microscale University of Science and Technology of ChinaHefei 230026China College of Chemistry and Materials Science Experimental Center of Engineering and Material ScienceUniversity of Science and Technology of ChinaHefei 230026China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

Catalytic conversion of nitrate(NO_(3)^(-))pollutants into ammonia(NH_(3))offers a sustainable and promising route for both wastewater treatment and NH_(3)*** cations are prevalent in nitrate solutions,but their roles beyond charge balance in catalytic NO_(3)^(-)conversion have been generally ***,we report the promotion effect of K^(+)cations in KNO_(3)solution for NO_(3)^(-)reduction over a TiO_(2)-supported Ni single-atom catalyst(Ni_(1)/TiO_(2)).For photocatalytic NO_(3)^(-)reduction reaction,Ni_(1)/TiO_(2)exhibited a 1.9-fold NH_(3)yield rate with nearly 100%selectivity in KNO_(3)solution relative to that in NaNO_(3)*** studies reveal that the K^(+)cations from KNO_(3)gradually bonded with the surface of Ni_(1)/TiO_(2),in situ forming a K-O-Ni moiety during reaction,whereas the Na^(+)ions were unable to interact with the catalyst in NaNO_(3)*** charge accumulation on the Ni sites induced by the incorporation of K atom promoted the adsorption and activation of NO_(3)^(-).Furthermore,the K-O-Ni moiety facilitated the multiple proton-electron coupling of NO_(3)^(-)into NH_(3)by stabilizing the intermediates.

关键词： Nitrate reduction Alkali cations Potassium Ni single-atom catalyst Ammonia