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科学通报（英文版）
科学通报（英文版）

周光召

旬刊

1001-6538

csb@scichina.com

010-64036120

100717

北京东黄城根北街16号

科学通报（英文版）/Journal Chinese Science BulletinEISCI
查看更多>>《科学通报》创刊于1950年，是中国科学院主办、中国科学杂志社承办的自然科学综合性学术刊物，报道自然科学各学科基础理论和应用研究方面具有创新性和和高水平的、具有重要意义的最新研究成果，要求文章的可读性强，能在一个比较宽范的学术领域产生深刻的影响。我们的目标是：成为国内外读者了解中国乃至世界范围的自然科学各研究领域最新成果的主要窗口之一。《科学通报》进入了国际上主要检索系统，如CA，EI，日本《科技速报》和美国科学信息研究所（ISI）的以下系统：Science Citation Index(SCI-CDE)，SCISearch，Current Contents(PC&E)和Research Alert。
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    Tunable vortex bound states in multiband CsV3Sb5-derived kagome superconductors

    Zihao HuangXianghe HanZhen ZhaoJinjin Liu...
    885-892页
    查看更多>>摘要：Vortices and bound states offer an effective means of comprehending the electronic properties of super-conductors.Recently,surface-dependent vortex core states have been observed in the newly discovered kagome superconductors CsV3Sb5.Although the spatial distribution of the sharp zero energy conductance peak appears similar to Majorana bound states arising from the superconducting Dirac surface states,its origin remains elusive.In this study,we present observations of tunable vortex bound states(VBSs)in two chemically-doped kagome superconductors Cs(V1-xTrx)3Sb5(Tr=Ta or Ti),using low-temperature scanning tunneling microscopy/spectroscopy.The CsV3Sb5-derived kagome superconductors exhibit full-gap-pairing superconductivity accompanied by the absence of long-range charge orders,in contrast to pristine CsV3Sb5.Zero-energy conductance maps demonstrate a field-driven continuous reorientation transition of the vortex lattice,suggesting multiband superconductivity.The Ta-doped CsV3Sb5 displays the conventional cross-shaped spatial evolution of Caroli-de Gennes-Matricon bound states,while theTi-doped CsV3Sb5 exhibits a sharp,non-split zero-bias conductance peak(ZBCP)that persists over a long dis-tance across the vortex.The spatial evolution of the non-split ZBCP is robust against surface effects and external magnetic field but is related to the doping concentrations.Our study reveals the tunable VBSs in multiband chemically-doped CsV3Sb5 system and offers fresh insights into previously reported Y-shaped ZBCP in a non-quantum-limit condition at the surface of kagome superconductor.
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    Observation of D-class topology in an acoustic metamaterial

    Shi-Qiao WuWenting ChengXiao-Yu LiuBing-Quan Wu...
    893-900页
    查看更多>>摘要：Topological materials and metamaterials opened new paradigms to create and manipulate phases of mat-ter with unconventional properties.Topological D-class phases(TDPs)are archetypes of the ten-fold clas-sification of topological phases with particle-hole symmetry.In two dimensions,TDPs support propagating topological edge modes that simulate the elusive Majorana elementary particles.Furthermore,a piercing of π-flux Dirac-solenoids in TDPs stabilizes localized Majorana excitations that can be braided for the purpose of topological quantum computation.Such two-dimensional(2D)TDPs have been a focus in the research frontier,but their experimental realizations are still under debate.Here,with a novel design scheme,we realize 2D TDPs in an acoustic crystal by synthesizing both the particle-hole and fermion-like time reversal symmetries for a wide range of frequencies.The design scheme leverages an enriched unit cell structure with real-valued couplings that emulate the targeted Hamiltonian of TDPs with complex hoppings:A technique that could unlock the realization of all topo-logical classes with passive metamaterials.In our experiments,we realize a pair of TDPs with opposite Chern numbers in two independent sectors that are connected by an intrinsic fermion-like time-reversal symmetry built in the system.We measure the acoustic Majorana-like helical edge modes and visualize their robust topological transport,thus revealing the unprecedented D and DⅢ class topologies with direct evidence.Our study opens up a new pathway for the experimental realization of two funda-mental classes of topological phases and may offer new insights in fundamental physics,materials science,and phononic information processing.
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    Ligand-mediated exciton dissociation and interparticle energy transfer on CsPbBr3 perovskite quantum dots for efficient CO2-to-CO photoreduction

    Fengyi ZhongJianping ShengChenyu DuYe He...
    901-912页
    查看更多>>摘要：Perovskite quantum dots(PQDs)hold immense potential as photocatalysts for CO2 reduction due to their remarkable quantum properties,which facilitates the generation of multiple excitons,providing the nec-essary high-energy electrons for CO2 photoreduction.However,harnessing multi-excitons in PQDs for superior photocatalysis remains challenging,as achieving the concurrent dissociation of excitons and interparticle energy transfer proves elusive.This study introduces a ligand density-controlled strategy to enhance both exciton dissociation and interparticle energy transfer in CsPbBr3 PQDs.Optimized CsPbBr3 PQDs with the regulated ligand density exhibit efficient photocatalytic conversion of CO2 to CO,achieving a 2.26-fold improvement over unoptimized counterparts while maintaining chemical integrity.Multiple analytical techniques,including Kelvin probe force microscopy,temperature-dependent photoluminescence,femtosecond transient absorption spectroscopy,and density functional theory calculations,collectively affirm that the proper ligand termination promotes the charge separation and the interparticle transfer through ligand-mediated interfacial electron coupling and electronic inter-actions.This work reveals ligand density-dependent variations in the gas-solid photocatalytic CO2 reduc-tion performance of CsPbBr3 PQDs,underscoring the importance of ligand engineering for enhancing quantum dot photocatalysis.
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    Sustainable liquid metal-induced conductive nacre

    Jia YanTianzhu ZhouJingsong PengHuagao Wang...
    913-921页
    查看更多>>摘要：Nacre has inspired research to fabricate tough bulk composites for practical applications using inorganic nanomaterials as building blocks.However,with the considerable pressure to reduce global carbon emis-sions,preparing nacre-inspired composites remains a significant challenge using more economical and environmentally friendly building blocks.Here we demonstrate tough and conductive nacre by assem-bling aragonite platelets exfoliated from natural nacre,with liquid metal and sodium alginate used as the"mortar".The formation of Ga-O-C coordination bonding between the gallium ions and sodium algi-nate molecules reduces the voids and improves compactness.The resultant conductive nacre exhibits much higher mechanical properties than natural nacre.It also shows excellent impact resistance attrib-uted to the synergistic strengthening and toughening fracture mechanisms induced by liquid metal and sodium alginate.Furthermore,our conductive nacre exhibits exceptional self-monitoring sensitivity for maintaining structural integrity.The proposed strategy provides a novel avenue for turning natural nacre into a valuable green composite.
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    Hit-and-run vaccine system that overcomes limited neoantigen epitopes for efficient broad antitumor response

    Hongyu ChenZichao HuangJiaxuan LiSi Dong...
    922-932页
    查看更多>>摘要：Neoantigen cancer vaccines have been envisioned as one of the most promising means for cancer thera-pies.However,identifying neoantigens for tumor types with low tumor mutation burdens continues to limit the effectiveness of neoantigen vaccines.Herein,we proposed a"hit-and-run"vaccine strategy which primes T cells to attack tumor cells decorated with exogenous"neo-antigens".This vaccine strat-egy utilizes a peptide nanovaccine to elicit antigen-specific T cell responses after tumor-specific decora-tion with a nanocarrier containing the same peptide antigens.We demonstrated that a poly(2-oxazoline)s(POx)conjugated with OVA257-264 peptide through a matrix metalloprotease 2(MMP-2)sensitive linker could efficiently and selectively decorate tumor cells with OVA peptides in vivo.Then,a POx-based nanovaccine containing OVA257-264 peptides to elicit OVA-specific T cell responses was designed.In com-bination with this hit-and-run vaccine system,an effective vaccine therapy was demonstrated across tumor types even without OVA antigen expression.This approach provides a promising and uniform vac-cine strategy against tumors with a low tumor mutation burden.
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    Bioinspired cytomembrane coating besieges tumor for blocking metabolite transportation

    Qingyan JiaZilin YueYuanying LiYunxiu Zhang...
    933-948页
    查看更多>>摘要：The metabolite transport inhibition of tumor cells holds promise to achieve anti-tumor efficacy.Herein,we presented an innovative strategy to hinder the delivery of metabolites through the in-situ besieging tumor cells with polyphenolic polymers that strongly adhere to the cytomembrane of tumor cells.Simultaneously,these polymers underwent self-crosslinking under the induction of tumor oxidative stress microenvironment to form an adhesive coating on the surface of the tumor cells.This polyphenol coating effectively obstructed glucose uptake,reducing metabolic products such as lactic acid,glu-tathione,and adenosine triphosphate,while also causing reactive oxygen species to accumulate in the tumor cells.The investigation of various tumor models,including 2D cells,3D multicellular tumor spher-oids,and xenograft tumors,demonstrated that the polyphenolic polymers effectively inhibited the growth of tumor cells by blocking key metabolite transport processes.Moreover,this highly adhesive coating could bind tumor cells to suppress their metastasis and invasion.This work identified polyphe-nolic polymers as a promising anticancer candidate with a mechanism by impeding the mass transport of tumor cells.
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    Single-cell profile reveals the landscape of cardiac immunity and identifies a cardio-protective Ym-1hi neutrophil in myocardial ischemia-reperfusion injury

    Yalan DongZhenyu KangZili ZhangYongqiang Zhang...
    949-967页
    查看更多>>摘要：Myocardial ischemia-reperfusion injury(MIRI)is a major hindrance to the success of cardiac reperfusion therapy.Although increased neutrophil infiltration is a hallmark of MIRI,the subtypes and alterations of neutrophils in this process remain unclear.Here,we performed single-cell sequencing of cardiac CD45+cells isolated from the murine myocardium subjected to MIRI at six-time points.We identified diverse types of infiltrating immune cells and their dynamic changes during MIRI.Cardiac neutrophils showed the most immediate response and largest changes and featured with functionally heterogeneous subpop-ulations,including Ccl3hi Neu and Ym-1hi Neu,which were increased at 6 h and 1 d after reperfusion,respectively.Ym-1hi Neu selectively expressed genes with protective effects and was,therefore,identified as a novel specific type of cardiac cell in the injured heart.Further analysis indicated that neutrophils and their subtypes orchestrated subsequent immune responses in the cardiac tissues,especially instructing the response of macrophages.The abundance of Ym-1hi Neu was closely correlated with the therapeutic efficacy of MIRI when neutrophils were specifically targeted by anti-Lymphocyte antigen 6 complex locus G6D(Ly6G)or anti-Intercellular cell adhesion molecule-1(ICAM-1)neutralizing antibodies.In addition,a neutrophil subtype with the same phenotype as Ym-1hi Neu was detected in clinical samples and corre-lated with prognosis.Ym-1 inhibition exacerbated myocardial injury,whereas Ym-1 supplementation significantly ameliorated injury in MIRI mice,which was attributed to the tilt of Ym-1 on the polarization of macrophages toward the repair phenotype in myocardial tissue.Overall,our findings reveal the anti-inflammatory phenotype of Ym-1hi Neu and highlight its critical role in myocardial protection during the early stages of MIRI.
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    Westerly-triggered lake-effect snowfall enhanced with climate warming over the Tibetan Plateau

    Yufeng DaiTao WangYongwei ShengLei Wang...
    968-977页
    查看更多>>摘要：Lake-effect snowfall(LES)occurs when cold air moves across open lakes.LES is expected to occur more frequently over the TP,due to the intensified lake expansion caused by intensified global warming.Thus,there is an urgent need to comprehensively assess the LES over the TP.Here,we revealed that the LES is triggered by westerly southward shift leading to the drop in air temperature and is positively correlated with lake area,wind speed and longitude across 12 large lakes(＞300 km2)based on satellite observations and reanalysis data.Using a sensitivity model simulation,we determined that large lakes in the southern TP contributed to more than 50％of the snowfall in the downwind area in 2013.Projections indicate that the westerly-triggered LES will increase under the future RCP4.5 climate warming scenario,highlighting the importance of developing adaptive policies to address the growing risks associated with future LES.
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    Dominant contribution of combustion-related ammonium during haze pollution in Beijing

    Libin WuPeng WangQiang ZhangHong Ren...
    978-987页
    查看更多>>摘要：Aerosol ammonium(NH4+),mainly produced from the reactions of ammonia(NH3)with acids in the atmo-sphere,has significant impacts on air pollution,radiative forcing,and human health.Understanding the source and formation mechanism of NH4+can provide scientific insights into air quality improvements.However,the sources of NH3 in urban areas are not well understood,and few studies focus on NH3/NH4 at different heights within the atmospheric boundary layer,which hinders a comprehensive under-standing of aerosol NH4+.In this study,we perform both field observation and modeling studies(the Community Multiscale Air Quality,CMAQ)to investigate regional NH3 emission sources and vertically resolved NH4+formation mechanisms during the winter in Beijing.Both stable nitrogen isotope analyses and CMAQ model suggest that combustion-related NH3 emissions,including fossil fuel sources,NH3 slip,and biomass burning,are important sources of aerosol NH4+with more than 60％contribution occurring on heavily polluted days.In contrast,volatilization-related NH3 sources(livestock breeding,N-fertilizer application,and human waste)are dominant on clean days.Combustion-related NH3 is mostly local from Beijing,and biomass burning is likely an important NH3 source(～15％-20％)that was previously over-looked.More effective control strategies such as the two-product(e.g.,reducing both SO2 and NH3)con-trol policy should be considered to improve air quality.
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