Sr-Doping-Modulated Metal-Insulator Transition in NdNiO3 Epitaxial Films

Perovskite-structured nickelates,ReNiO_(3)(Re=rare earth),have long garnered significant research interest due to their sharp and highly tunable metal-insulator transitions(MITs).Doping the parent compound ReNiO_(3)with alkaline earth metal can substantially suppress this MIT.Recently,intriguing superconductivity has been discovered in doped infinite-layer nickelates(ReNiO_(2)),while the mechanism behind A-site doping-suppressed MIT in the parent compound ReNiO_(3)remains unclear.To address this problem,we grew a series of Nd_(1−x)Sr_(x)NiO_(3)(NSNO,x=0–0.2)thin films and conducted systematic electrical transport measurements.Our resistivity and Hall measurements suggest that Sr-induced excessive holes are not the primary reason for MIT suppression.Instead,first-principles calculations indicate that Sr cations,with larger ionic radius,suppress breathing mode distortions and promote charge transfer between oxygen and Ni cations.This process weakens Ni–O bond disproportionation and Ni^(2+)/Ni^(4+)charge disproportionation.Such significant modulations in lattice and electronic structures convert the ground state from a charge-disproportionated antiferromagnetic insulator to a paramagnetic metal,thereby suppressing the MIT.This scenario is further supported by the weakened MIT observed in the tensile-strained NSNO/SrTiO_(3)(001)films.Our work reveals the A-side doping-modulated electrical transport of perovskite nickelate films,providing deeper insights into novel electric phases in these strongly correlated nickelate systems.

积极老龄化视角下家庭养老床位的实践探索及发展路径

积极老龄化背景下,家庭养老床位服务是居家养老与智能专业化养老服务相结合的新模式,在满足多样化养老需求,缓解养老资源不足,弥补家庭养老专业性欠缺等方面有积极作用。以南京市、西宁市与沈阳市为例,三地的家庭养老床位建设工作已趋于完善,正处于逐步普及阶段,未来还将随着社会发展进一步提升服务质量,为更多老年人解决养老难问题,进而实现积极养老。提供入户精准服务,培养专业照护人才;激发家庭内生动力,促进社会积极参与;出台相应政策,完善服务制度体系等是提高家庭养老床位服务质量,解决我国老龄化及养老问题,推动我国社会和谐稳定发展的有效路径。

Highly Tunable Perpendicular Magnetic Anisotropy and Anisotropic Magnetoresistance in Ru-Doped La_(0.67)Sr_(0.33)MnO_(3)Epitaxial Films

As a prototypical half-metallic ferromagnet,La_(0.67)Sr_(0.33)MnO_(3)(LSMO)has been extensively studied due to its versatile physical properties and great potential in spintronic applications.However,the weak perpendicular magnetic anisotropy(PMA)limits the controllability and detection of magnetism in LSMO,thus hindering the realization of oxide-based spintronic devices with low energy consumption and high integration level.Motivated by this challenge,we develop an experimental approach to enhance the PMA of LSMO epitaxial films.By cooperatively introducing 4d Ru doping and a moderate compressive strain,the maximum uniaxial magnetic anisotropy in Ru-doped LSMO can reach 3.0×10^(5)J/m^(3)at 10 K.Furthermore,we find a significant anisotropic magnetoresistance effect in these Ru-doped LSMO films,which is dominated by the strong PMA.Our findings offer an effective pathway to harness and detect the orientations of magnetic moments in LSMO films,thus promoting the feasibility of oxide-based spintronic devices,such as spin valves and magnetic tunnel junctions.

智能化集装箱码头建筑策划简析

本文从总体规划、建筑策划、交通组织、场地景观、绿色节能等几个方面深入分析,通过前期充分的收集调研、分析论证,结合项目条件及特点,提炼建筑设计活动自始至终贯穿的设计思想和设计理念,并使策划与设计实践互相融合。结合整个码头工程智慧绿色港口的主导思想,提出了科学合理的设计目标,并通过设计实践和设计手段为实现这一目标进行反馈和验证。本项目建筑策划为项目建设合理性提供保障,为同类项目建设提供借鉴参考。

舒芬太尼靶控输注的临床应用进展

靶控输注(target-controlled Infusion,TCI)是在输注静脉麻醉药物时应用药代动力学和药效动力学原理,通过调节目标(血浆或效应室)的药物浓度来控制或维持麻醉深度。舒芬太尼TCI广泛应用于不同手术的麻醉,本文将主要介绍舒芬太尼TCI在全麻的诱导和气管插管、心脏手术、需要术中唤醒手术、病态肥胖患者手术以及术后镇痛中的应用,旨在为今后的临床应用和基础研究提供理论参考。

3D MXene architectures as sulfur hosts for high-performance lithium-sulfur batteries

Lithium-sulfur batteries(LSBs)are one of the most promising energy storage devices because of their high theoretical energy density;however,inherent issues including poor electrical conductivity and severe dissolution of S and its discharged products hinder their practical applications.MXenes have metallic conductivity,ultra-thin two-dimensional(2D)structures,rich surface functional groups,and macrostructural adjustability and have been widely used to design advanced sulfur hosts.3D network structures assembled by 2D MXene nanosheets have shown superior performance for improving reaction kinetics,accommodating and dispersing sulfur at the micro-/nanoscale,and capturing polysulfides due to their porous interconnected structure.Herein,the applications of MXene architectures related to 2D layered structures,3D multilayered structures,and 3D spherical structures as sulfur hosts are reviewed.The structure-performance relationship,challenges for current designs,and opportunities for future 3D architectures for LSBs are also analyzed.

Core-shell meso/microporous carbon host for sulfur loading toward applications in lithium-sulfur batteries

Lithium-sulfur（Li-S） batteries belong to one of the promising technologies for high-energy-density rechargeable batteries.However,sulfur cathodes suffer from inherent problems of its poor electronic conductivity and the shuttling of highly dissoluble lithium polysulfides generated during the cycles.Loading sulfur into porous carbons has been proved to be an effective approach to alleviate these issues.Mesoporous and microporous carbons have been widely used for sulfur accommodation,but mesoporous carbons have poor sulfur confinement,whereas microporous carbons are impeded by low sulfur loading rates.Here,a core-shell carbon,combining both the merits of mesoporous carbon with large pore volume and microporous carbon with effective sulfur confinement,was prepared by coating the mesoporous CMK-3 with a microporous carbon（MPC） shell and served as the carbon host（CMK-3 @MPC） to accommodate sulfur.After sulfur infusion,the as-obtained S/（CMK-3@MPC） cathode delivered a high initial capacity of up to 1422 mAh·g-1 and sustained 654 mAh·g-1 reversible specific capacity after 36 cycles at 0.1 C.The good performance is ascribed to the unique core-shell structure of the CMK-3@MPC matrix,in which sulfur can be effectively confined within the meso/microporous carbon host,thus achieving simultaneously high electrochemical utilization.

B-type natriuretic peptide in predicting the severity of community-acquired pneumonia

BACKGROUND: Although pneumonia severity index(PSI) is widely used to evaluate the severity of community-acquired pneumonia(CAP), the calculation of PSI is very complicated. The present study aimed to evaluate the role of B-type natriuretic peptide(BNP) in predicting the severity of CAP.METHODS: For 202 patients with CAP admitted to the emergency department, BNP levels, cardiac load indexes, inf lammatory indexes including C-reactive protein(CRP), white blood cell count(WBC), and PSI were detected. The correlation between the indexes and PSI was investigated. BNP levels for survivor and non-survivor groups were compared, and a receiver operating characteristic(ROC) curve analysis was performed on the BNP levels versus PSI.RESULTS: The BNP levels increased with CAP severity(r=0.782, P<0.001). The BNP levels of the high-risk group(PSI classes IV and V) were signifi cantly higher than those of the low-risk group(PSI classes I–III)(P<0.001). The BNP levels were signifi cantly higher in the non-survivor group than in the survivor group(P<0.001). In addition, there were positive correlations between BNP levels and PSI scores(r=0.782, P<0.001). The BNP level was highly accurate in predicting the severity of CAP(AUC=0.952). The optimal cut-off point of BNP level for distinguishing high-risk patients from low-risk ones was 125.0 pg/m L, with a sensitivity of 0.891 and a specifi city of 0.946. Moreover, BNP level was accurate in predicting mortality(AUC=0.823). Its optimal cut-off point for predicting death was 299.0 pg/m L, with a sensitivity of 0.675 and a specifi city of 0.816. Its negative predictive cut-off value was 0.926, and the positive predictive cut-off value was 0.426.CONCLUSION: BNP level is positively correlated with the severity of CAP, and may be used as a biomarker for evaluating the severity of CAP.

Verification of quantum networks using the GHZ paradox

The Greenberger–Horne–Zeilinger(GHZ)paradox shows that it is possible to create a multipartite state involving three or more particles in which the measurement outcomes of the particles are correlated in a way that cannot be explained by classical physics.We extend it to witness quantum networks.We first extend the GHZ paradox to simultaneously verify the GHZ state and Einstein–Podolsky–Rosen states on triangle networks.We then extend the GHZ paradox to witness the entanglement of chain networks consisting of multiple GHZ states.All the present results are robust against the noise.

Lithiophilic interface guided transient infiltration of molten lithium for stable 3D composite lithium anodes

Fabricating three-dimensional(3D)composite lithium anodes via thermal infusion effectively addresses uncontrollable Li deposition and large volume changes.However,potential risks due to the long wetting time and high melting point remain a critical yet unconsidered issue.Herein,we report a stable 3D composite Li anode by infusing molten Li into a 3D scaffold within 3 s at 220℃.The key-enabling technique is the growth of a lithiophilic Mg-Al double oxide(LDO)nanosheet array layer on the scaffold.The in-situ formed lithiophilic alloy,combined with the capillary forces from the nanosheet arrays,enabled the transient infiltration of molten Li.In addition,the formed high ionic-conductivity Li phase can help construct a robust solid electrolyte interphase(SEI),stabilize the Li anode/electrolyte interface,and guide uniform Li deposition.The 3D composite anode exhibited a long cycling life of 1,000 h under a current density of 1 mA·cm^(−2)and over 1,600 h under a current density of 2 mA·cm^(−2)with a high areal capacity of 4 mAh·cm^(−2)in Li/Li symmetric cells.The 3D composite anodes paired with high areal capacity LiFePO_(4)(LFP)and S cathodes demonstrate its practical application feasibility.

Self-supported hard carbon anode from fungus-treated basswood towards sodium-ion batteries

Hard carbon derived from biomass is regarded as a promising anode material for sodium-ion batteries(SIBs)because of its low operating potential,high capacity,resource availability,and low cost.However,scientific and technological challenges still exist to prepare hard carbon with a high initial Coulombic efficiency(ICE),an excellent rate capability,and good cycling stability.In this work,we report a self-supported hard carbon electrode from fungus-pretreated basswood with an improved graphitization degree and a low tortuosity.Compared with the hard carbon derived from basswood,the hard carbon electrode from fungus-pretreated basswood has an improved rate capability of 242.3 mAh·g^(−1)at 200 mA·g^(−1)and cycling stability with 93.9%of its capacity retention after 200 cycles at 40 mA·g^(−1),as well as the increased ICE from 84.3%to 88.2%.Additionally,ex-situ X-ray diffraction indicates that Na+adsorption caused the sloping capacity,whereas Na+intercalation between interlayer spacing corresponded to the low potential plateau capacity.This work provides a new perspective for the preparation of high-performance hard carbon and gains the in-depth understanding of Na storage mechanism.

iRGD-reinforced, photo-transformable nanoclusters toward cooperative enhancement of intratumoral penetration and antitumor efficacy

Insufficient intratumoral penetration greatly hurdles the anticancer performance of nanomedicine. To realize highly efficient tumor penetration in a precisely and spatiotemporally controlled manner, far-red light-responsive nanoclusters (NCs) capable of size shrinkage and charge conversion were developed and co-administered with iRGD to synergistically improve the intratumoral penetration and the anticancer efficacy. The NCs were constructed using the singlet oxygen-sensitive (SOS) polyethylene glycolpolyurethane-polyethylene glycol (PEG-(1O2)PU-PEG) triblock copolymer to encapsulate the doxorubicin (DOX)-loaded, chlorin e6 (Ce6)-conjugated polyamindoamine (PAMAM) dendrimer (DCD) via the double-emulsion method. Co-administration of iRGD notably increased the permeability of NCs within tumor vasculature and tumor tissues. In addition, upon far-red light irradiation (660 nm) of tumors at low optical density (10 mW/cm2), the generated 1O2 could disintegrate the NCs and release the DCD with positive surface charge and ultra-small size (~ 5 nm), which synergized with iRGD to enable deep intratumoral penetration. Consequently, the local 1O2 at lethal concentrations along with the released DOX efficiently and cooperatively eradicated tumor cells. This study provides a convenient approach to spatiotemporally promote the intratumoral penetration of nanomedicine and mediate programmed anticancer therapy.