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  • Hierarchically structured porous materials: synthesis strategies and applications in energy storage
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-24
    Wu L, Li Y, Fu Z, et al.

    AbstractTo address the growing energy demands of sustainable development, it is crucial to develop new materials that can improve the efficiency of energy storage systems. Hierarchically structured porous materials have shown their great potential for energy storage applications owing to their large accessible space, high surface area, low density, excellent accommodation capability with volume and

    更新日期:2020-11-13
  • Diffusion and catalyst efficiency in hierarchical zeolite catalysts
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-21
    Peng P, Gao X, Yan Z, et al.

    AbstractThe preparation of hierarchical zeolites with reduced diffusion limitation and enhanced catalyst efficiency has become a vital focus in the field of zeolites and porous materials chemistry within the past decades. This review will focus on the diffusion and catalyst efficiency of hierarchical zeolites and industrial catalysts. The benefits of diffusion and catalyst efficiency at two levels

    更新日期:2020-11-13
  • Efficient potential-tuning strategy through p-type doping for designing cathodes with ultrahigh energy density
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-07-27
    Wang Z, Wang D, Zou Z, et al.

    AbstractDesigning new cathodes with high capacity and moderate potential is the key to breaking the energy density ceiling imposed by current intercalation chemistry on rechargeable batteries. The carbonaceous materials provide high capacities but their low potentials limit their application to anodes. Here, we show that Fermi level tuning by p-type doping can be an effective way of dramatically raising

    更新日期:2020-11-13
  • Simultaneous changes in seed size, oil content and protein content driven by selection of SWEET homologues during soybean domestication
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-05-27
    Wang S, Liu S, Wang J, et al.

    AbstractSoybean accounts for more than half of the global production of oilseed and more than a quarter of the protein used globally for human food and animal feed. Soybean domestication involved parallel increases in seed size and oil content, and a concomitant decrease in protein content. However, science has not yet discovered whether these effects were due to selective pressure on a single gene

    更新日期:2020-11-13
  • Hierarchically porous monoliths based on low-valence transition metal (Cu, Co, Mn) oxides: gelation and phase separation
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-05-27
    Lu X, Kanamori K, Nakanishi K.

    AbstractHierarchically porous monoliths based on copper (Cu), cobalt (Co) and manganese (Mn) oxides with three-dimensionally (3D) interconnected macropores and open nanopores were prepared using metal bromides as precursors via a sol–gel process accompanied by phase separation. The difficulty of gelation for low-valence metal cation was overcome by introducing a highly electronegative Br atom near

    更新日期:2020-11-13
  • Construction of hollow mesoporous silica nanoreactors for enhanced photo-oxidations over Au-Pt catalysts
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-04-24
    Tian H, Zhao J, Wang X, et al.

    AbstractIt is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction of micro/nanoreactors. Herein, we report the construction of hollow-structured submicrometer-photoreactors with bimetallic catalysts loaded within mesoporous silicas. The synthesis parameters are optimized to study the evolution of hollow structure through hydrothermal treatment

    更新日期:2020-11-13
  • Efficient sequential harvesting of solar light by heterogeneous hollow shells with hierarchical pores
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-04-08
    Wei Y, Wan J, Yang N, et al.

    AbstractIn nature, sequential harvesting of light widely exists in the old life entity, i.e. cyanobacteria, to maximize the light absorption and enhance the photosynthesis efficiency. Inspired by nature, we propose a brand new concept of temporally-spatially sequential harvesting of light in one single particle, which has purpose-designed heterogeneous hollow multi-shelled structures (HoMSs) with porous

    更新日期:2020-11-13
  • Recent advances in the synthesis of hierarchically mesoporous TiO2 materials for energy and environmental applications
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-02-14
    Zhang W, Tian Y, He H, et al.

    AbstractBecause of their low cost, natural abundance, environmental benignity, plentiful polymorphs, good chemical stability and excellent optical properties, TiO2 materials are of great importance in the areas of physics, chemistry and material science. Much effort has been devoted to the synthesis of TiO2 nanomaterials for various applications. Among them, mesoporous TiO2 materials, especially with

    更新日期:2020-11-13
  • Hierarchically porous metal–organic frameworks: synthetic strategies and applications
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2019-11-05
    Feng L, Wang K, Lv X, et al.

    AbstractDespite numerous advantages, applications of conventional microporous metal–organic frameworks (MOFs) are hampered by their limited pore sizes, such as in heterogeneous catalysis and guest delivery, which usually involve large molecules. Construction of hierarchically porous MOFs (HP-MOFs) is vital to achieve the controllable augmentation of MOF pore size to mesopores or even macropores, which

    更新日期:2020-11-13
  • Self-assembly of metalla[3]catenanes, Borromean rings and ring-in-ring complexes using a simple π-donor unit
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-07-15
    Lu Y, Liu D, Lin Y, et al.

    AbstractDespite extensive research and several stunning breakthroughs in the synthesis of interlocked molecular species, [3]catenanes, Borromean rings and ring-in-ring complexes are exceedingly rare and their targeted synthesis remains a formidable challenge. Herein, a series of Cp*Rh-based homogeneous and heterogeneous interlocked structures have been prepared by coordination-driven self-assembly

    更新日期:2020-10-15
  • Electric field manipulation enhanced by strong spin-orbit coupling: promoting rare-earth ions as qubits
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-06-27
    Liu Z, Wang Y, Fang Y, et al.

    AbstractQuantum information processing based on magnetic ions has potential for applications as the ions can be modified in their electronic properties and assembled by a variety of chemical methods. For these systems to achieve individual spin addressability and high energy efficiency, we exploited the electric field as a tool to manipulate the quantum behaviours of the rare-earth ion which has strong

    更新日期:2020-10-15
  • Direct transformation of dinitrogen: synthesis of N-containing organic compounds via N−C bond formation
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-06-23
    Lv Z, Wei J, Zhang W, et al.

    AbstractN-containing organic compounds are of vital importance to lives. Practical synthesis of valuable N-containing organic compounds directly from dinitrogen (N2), not through ammonia (NH3), is a holy-grail in chemistry and chemical industry. An essential step for this transformation is the functionalization of the activated N2 units/ligands to generate N−C bonds. Pioneering works of transition

    更新日期:2020-10-15
  • Equatorial aurora: the aurora-like airglow in the negative magnetic anomaly
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-04-24
    He F, Wei Y, Wan W.

    AbstractThe most fantastic optical phenomena in the Earth's upper atmosphere are the auroras. They are highly informative indicators of solar activity, geomagnetic activity, upper atmospheric structures and dynamics, and magnetospheric energetic particles. An area where the geomagnetic field differs significantly from the expected symmetric dipole, such as at the South Atlantic Anomaly, where the magnetic

    更新日期:2020-10-15
  • Coexistence of plastic and partially diffusive phases in a helium-methane compound
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-04-22
    Gao H, Liu C, Hermann A, et al.

    AbstractHelium and methane are major components of giant icy planets and are abundant in the universe. However, helium is the most inert element in the periodic table and methane is one of the most hydrophobic molecules, thus whether they can react with each other is of fundamental importance. Here, our crystal structure searches and first-principles calculations predict that a He3CH4 compound is stable

    更新日期:2020-10-15
  • Deep-learning-based information mining from ocean remote-sensing imagery
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-03-19
    Li X, Liu B, Zheng G, et al.

    AbstractWith the continuous development of space and sensor technologies during the last 40 years, ocean remote sensing has entered into the big-data era with typical five-V (volume, variety, value, velocity and veracity) characteristics. Ocean remote-sensing data archives reach several tens of petabytes and massive satellite data are acquired worldwide daily. To precisely, efficiently and intelligently

    更新日期:2020-10-15
  • Recent progress in reactivity study and synthetic application of N-heterocyclic phosphorus hydrides
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-30
    Jingjing Zhang; Jin-Dong Yang; Jin-Pei Cheng

    N-heterocyclic phosphines (NHPs) have recently emerged as a new group of promising catalysts for metal-free reductions, owing to their unique hydridic reactivity. The excellent hydricity of NHPs, which rivals or even exceeds those of many metal-based hydrides, is the result of hyperconjugative interactions between the lone-pair electrons on N atoms and the adjacent σ*(P–H) orbital. Compared with the

    更新日期:2020-09-30
  • Pathological changes in the lungs and lymphatic organs of twelve COVID-19 autopsy cases
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-29
    Qian Liu; Yu Shi; Jun Cai; Yaqi Duan; Rongshuai Wang; Hongyan Zhang; Qiurong Ruan; Jiansha Li; Lei Zhao; Yifang Ping; Rong Chen; Liang Ren; Xiaochun Fei; Heng Zhang; Rui Tang; Xi Wang; Tao Luo; Xindong Liu; Xuequan Huang; Zhenhua Liu; Qilin Ao; Yong Ren; Jing Xiong; Zhicheng He; Haibo Wu; Wenjuan Fu; Pengnan Zhao; Xinwei Chen; Guoqiang Qu; Yunyun Wang; Xi Wang; Jia Liu; Dongfang Xiang; Sanpeng Xu;

    Systematic autopsy and comprehensive pathological analyses of COVID-19 decedents should provide insights into the disease characteristics and facilitate the development of novel therapeutics. In this study, we report the autopsy findings from the lungs and lymphatic organs of twelve COVID-19 decedents that evaluated histopathological changes, immune cell signature, and inflammatory factor expression

    更新日期:2020-09-29
  • Six-membered-ring inorganic materials: definition and prospects
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-28
    Gang Liu; Xing-Qiu Chen; Bilu Liu; Wencai Ren; Hui-Ming Cheng

    The six-membered ring (SMR) is a common structure unit for numerous material systems. These materials include, but are not limited to, the typical two-dimensional materials such as graphene, h-BN, and transition metal dichalcogenides, as well as three-dimensional materials such as beryllium, magnesium, MgB2, and Bi2Se3. Although many of these materials have already become ‘stars’ in materials science

    更新日期:2020-09-28
  • Distribution of Airborne SARS-CoV-2 and possible aerosol transmission in Wuhan hospitals, China
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-28
    Jia Hu; Chengfeng Lei; Zhen Chen; Weihua Liu; Xujuan Hu; Rongjuan Pei; Zhengyuan Su; Fei Deng; Yu Huang; Xiulian Sun; Junji Cao; Wuxiang Guan

    SARS-CoV-2 viral RNA was found in 21% of the aerosol (n = 38) and 39% of the mask (n = 23) samples collected from Wuhan hospitals early in 2020. Viable virus was isolated from one surgical mask, but not from any of the viral RNA positive aerosol samples.

    更新日期:2020-09-28
  • Evenness is important in assessing progress towards sustainable development goals
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-28
    Yali Liu; Jianqing Du; Yanfen Wang; Xiaoyong Cui; Jichang Dong; Yanbin Hao; Kai Xue; Hongbo Duan; Anquan Xia; Yi Hu; Zhi Dong; Bingfang Wu; Xinquan Zhao; Bojie Fu

    Sustainable Development Goals (SDGs) emphasize a holistic achievement instead of cherry-picking a few. However, no assessment has quantitatively considered the evenness among all 17 goals. Here, we propose a systematic method, which first integrates both the evenness and the overall status of all goals, to distinguish the ideal development pathways from the uneven ones and then revisit the development

    更新日期:2020-09-28
  • Prediction of giant and ideal Rashba-type splitting in ordered alloy monolayers grown on a polar surface
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-25
    Mingxing Chen; Feng Liu

    A large and ideal Rashba-type spin-orbit splitting is desired for the applications of materials in spintronic devices and the detection of Majorana Fermions in solids. Here, we propose an approach to achieve giant and ideal spin-orbit splittings through a combination of ordered surface alloying and interface engineering, that is, growing alloy monolayers on an insulating polar surface. We illustrate

    更新日期:2020-09-26
  • On the founder effect in COVID-19 outbreaks – How many infected travelers may have started them all?
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-24
    Yongsen Ruan; Zhida Luo; Xiaolu Tang; Guanghao Li; Haijun Wen; Xionglei He; Xuemei Lu; Jian Lu; Chung-I Wu

    How many incoming travelers [I0 at time 0, equivalent to the “founders” in evolutionary genetics] infected with SARS-CoV-2 who visit or return to a region could have started the epidemic of that region? I0 would be informative about the initiation and progression of the epidemics. To obtain I0, we analyze the genetic divergence among viral populations of different regions. By applying the “individual-output”

    更新日期:2020-09-24
  • Beyond direct neighbourhood effects: higher-order interactions improve modelling and predicting tree survival and growth
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-23
    Yuanzhi Li; Margaret M Mayfield; Bin Wang; Junli Xiao; Kamil Kral; David Janik; Jan Holik; Chengjin Chu

    It is known that biotic interactions are the key to species coexistence and maintenance of species diversity. Traditional studies focus overwhelmingly on pairwise interactions between organisms, ignoring complex higher-order interactions (HOIs). In this study, we present a novel method of calculating individual-level HOIs for trees, and use this method to test the importance of size- and distance-dependent

    更新日期:2020-09-24
  • Regenerated isotropic wood
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-19
    Qing-Fang Guan; Zi-Meng Han; Huai-Bin Yang; Zhang-Chi Ling; Shu-Hong Yu

    Constructing sustainable high-performance structural materials is a core part of the key global sustainability goal. Variety of efforts have been made in this field, however, challenges remain on how to lower the cost by using all-green basic building blocks and improve its mechanical properties to meet the demand of practical applications. Here, we report a robust and efficient bottom-up strategy

    更新日期:2020-09-20
  • A direct measurement method of quantum relaxation time
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-18
    Peng Zhang; Haoqi Tang; Chuanchuan Gu; Hong Wang; Guangfu Luo; Yalin Lu; X-D Xiang

    Quantum relaxation time of electrons in condensed matters is the most important physical property while its direct measurement has been elusive for a century. Here, we report a breakthrough that allows us to directly determine quantum relaxation time at zero and non-zero frequencies using optical measurement. Through dielectric loss function, we connect bound electron effect to the physical parameters

    更新日期:2020-09-20
  • Controlled direct synthesis of single- to multiple-layer MWW zeolite
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-14
    Jie-Qiong Chen; Yu-Zhao Li; Qing-Qing Hao; Huiyong Chen; Zhao-Tie Liu; Chengyi Dai; Jianbo Zhang; Xiaoxun Ma; Zhong-Wen Liu

    The minimized diffusion limitation and completely exposed strong acid sites of the ultrathin zeolites make it an industrially important catalyst especially for converting bulky molecules. However, the structure-controlled and large-scale synthesis of the material is still a challenge. In this work, the direct synthesis of the single-layer MWW zeolite was demonstrated by using hexamethyleneimine and

    更新日期:2020-09-14
  • Integration of Bio-inspired lanthanide-transition metal cluster and P-doped carbon nitride for efficient photocatalytic overall water splitting
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-14
    Rong Chen; Gui-Lin Zhuang; Zhi-Ye Wang; Yi-Jing Gao; Zhe Li; Cheng Wang; Yang Zhou; Ming-Hao Du; Suyuan Zeng; La-Sheng Long; Xiang-Jian Kong; Lan-Sun Zheng

    Photosynthesis in nature uses the Mn4CaO5 cluster as the oxygen-evolving center to catalyze the water oxidation efficiently in photosystem II (PS II). Herein, we demonstrate a bio-inspired heterometallic cluster LnCo3 (Ln = Nd, Eu and Ce) clusters, which can be viewed as synthetic analogs of CaMn4O5 cluster. Anchoring LnCo3 on phosphorus-doped graphitic carbon nitrides (PCN) shows efficient overall

    更新日期:2020-09-14
  • Mars exploration on the move
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-12
    Mu-ming Poo

    While the world is still struggling to overcome the COVID-19 pandemic, a new round of Mars exploration proceeded as planned, catching the July–August 2020 window of Earth–Mars close proximity that occurs once every 26 months. The excitement began with United Arab Emirates’ launch of the Hope orbiter on 19 July, followed by China's launch of the Tianwen 1 (天问一号) explorer on 23 July, and NASA’s launch

    更新日期:2020-09-13
  • Tiny noise, big mistakes: adversarial perturbations induce errors in Brain-Computer Interface spellers
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-10
    Xiao Zhang; Dongrui Wu; Lieyun Ding; Hanbin Luo; Chin-Teng Lin; Tzyy-Ping Jung; Ricardo Chavarriaga

    An electroencephalogram (EEG) based brain-computer interface (BCI) speller allows a user to input text to a computer by thought. It is particularly useful to severely disabled individuals, e.g., amyotrophic lateral sclerosis patients, who have no other effective means of communication with another person or a computer. Most studies so far focused on making EEG-based BCI spellers faster and more reliable;

    更新日期:2020-09-11
  • A multiaxial lead-free two-dimensional organic-inorganic perovskite ferroelectric
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-08
    Chao-Ran Huang; Xuzhong Luo; Xiao-Gang Chen; Xian-Jiang Song; Zhi-Xu Zhang; Ren-Gen Xiong

    Two-dimensional (2D) hybrid organic-inorganic perovskites (HOIPs) have recently gained tremendous interest because of their unique features in contrast to the three-dimensional counterparts and the traditional 2D materials. However, although some 2D HOIP ferroelectrics have been achieved, the issue of toxic Pb and the uniaxial nature impede their further application. Herein, for the first time, we

    更新日期:2020-09-08
  • Reinvigorating the Wiener-Hopf technique in the pursuit to understand processes and materials
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-08
    I D Abrahams; X Huang; A Kisil; G Mishuris; M Nieves; S Rogosin; I Spitkovsky

    This perspective originated during the Isaac Newton Institute for Mathematical Sciences research programme “Bringing pure and applied analysis together via the Wiener-Hopf technique, its generalisations and applications (WHT)”. It fuelled intensive discussions on current pure and applied mathematical challenges of the Wiener-Hopf technique, driven by its impact on real-world problems.

    更新日期:2020-09-08
  • Light-driven directional ion transport for enhanced osmotic energy harvesting
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-08
    Kai Xiao; Paolo Giusto; Fengxiang Chen; Ruotian Chen; Tobias Heil; Shaowen Cao; Lu Chen; Fengtao Fan; Lei Jiang

    Light-driven ion (proton) transport is a crucial process both for photosynthesis of green plants and solar energy harvesting of some archaea. Here, we describe that TiO2/C3N4 semiconductor heterojunction nanotube membrane can realize a similar light-driven directional ion transport performance as biological systems. This heterojunction system can be fabricated by two simple deposition steps. Under

    更新日期:2020-09-08
  • All-optical attosecond time domain interferometry
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-04
    Zhen Yang; Wei Cao; Yunlong Mo; Huiyao Xu; Kang Mi; Pengfei Lan; Qingbin Zhang; Peixiang Lu

    Interferometry, a key technique in modern precision measurements, has been used for length measurement in engineering metrology and astronomy. An analogous time-domain interferometric technique would represent a significant complement to spatial domain applications and require the manipulation of interference on extreme time and energy scales. Here, we report an all-optical interferometer using laser-driven

    更新日期:2020-09-05
  • A virtual sequencer reveals the dephasing patterns in error-correction code DNA sequencing
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-03
    Wenxiong Zhou; Li Kang; Haifeng Duan; Shuo Qiao; Louis Tao; Zitian Chen; Yanyi Huang

    An error-correction code (ECC) sequencing approach has recently been reported to effectively reduce sequencing errors by interrogating a DNA fragment with three orthogonal degenerate sequencing-by-synthesis (SBS) reactions. However, similar to other non-single-molecule SBS methods, the reaction will gradually lose its synchronization within a molecular colony in ECC sequencing. This phenomenon, called

    更新日期:2020-09-03
  • Efficient network immunization under limited knowledge
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-03
    Yangyang Liu; Hillel Sanhedrai; GaoGao Dong; Louis M Shekhtman; Fan Wang; Sergey V Buldyrev; Shlomo Havlin

    Targeted immunization of centralized nodes in large-scale networks has attracted significant attention. However, in real-world scenarios, knowledge and observations of the network may be limited thereby precluding a full assessment of the optimal nodes to immunize (or quarantine) in order to avoid epidemic spreading such as that of the current COVID-19 epidemic. Here, we study a novel immunization

    更新日期:2020-09-03
  • Precise fabrication of single-atom alloy co-catalyst with optimal charge state for enhanced photocatalysis
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-03
    Yating Pan; Yunyang Qian; Xusheng Zheng; Sheng-Qi Chu; Yijun Yang; Chunmei Ding; Xi Wang; Shu-Hong Yu; Hai-Long Jiang

    While surface charge state of co-catalysts plays a critical role for boosting photocatalysis, the study on surface charge regulation via their precise structure control, remains extremely rare. Herein, a metal-organic framework (MOF)-stabilized bimetallic Pd@Pt nanoparticles (NPs), which feature adjustable Pt coordination environment and the controlled structure from core-shell to single-atom alloy

    更新日期:2020-09-03
  • Palladium nanoplates scotch breast cancer lung metastasis by constraining epithelial-mesenchymal transition
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-03
    Shunhao Wang; Jingchao Li; Mei Chen; Liting Ren; Wenya Feng; Lining Xu; Xiaolan Chen; Tian Xia; Nanfeng Zheng; Sijin Liu

    Metastasis accounts for majority of cancer deaths in many tumor types including breast cancer. Epithelial-mesenchymal transition (EMT) is the driving force for the occurrence and progression of metastasis, however, no targeted strategies to block the EMT program are currently available to combat metastasis. Diverse engineered nanomaterials (ENMs) have been reported to exert promising anti-cancer effects

    更新日期:2020-09-03
  • Multi-modal channel cancer chemotherapy by 2D functional gadolinium metal-organic framework
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-03
    Jiale Xia; Yumeng Xue; Bo Lei; Lingling Xu; Mingzi Sun; Na Li; Hongyang Zhao; Min Wang; Meng Luo; Chao Zhang; Bolong Huang; Yaping Du; Chun-Hua Yan

    Two-dimensional (2D) nanomaterials generally exhibit enhanced physiochemical and biological functions in biomedical applications due to their high surface-to-volume ratio and surface charge. Conventional cancer chemotherapy based on nanomaterials has been hindered by their low drug loading and poor penetration in tumor tissue. To overcome these difficulties, the novel materials systems are urgently

    更新日期:2020-09-03
  • Constructing interfacial potential barrier via a gradient configuration: an effective method to enhance energy-filtering effect
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-03
    Zizhen Lin; Yinshi Li; Ya-Ling He

    Organic/inorganic hybrids suffer from low power factor (⁠|${S^2}\sigma $|⁠) due to the anticorrelation between Seebeck coefficient (S) and electrical conductivity (⁠|$\sigma $|⁠). Energy-filtering effect becomes a promising way to trade off S and |$\sigma $|⁠. Herein, we propose an effective method that constructs the heterogeneous interfaces containing the gradient potential barrier to greatly enhance

    更新日期:2020-09-03
  • Electronic structures and topological properties in nickelates Lnn + 1NinO2n + 2
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-09-02
    Jiacheng Gao; Shiyu Peng; Zhijun Wang; Chen Fang; Hongming Weng

    After the significant discovery of the hole-doped nickelate compound Nd0.8Sr0.2NiO2, an analysis of the electronic structure, orbital components, Fermi surfaces and band topology could be helpful to understand the mechanism of its superconductivity. Based on the first-principles calculations, we find that Ni |$3d_{x^2-y^2}$| states contribute the largest Fermi surface. |$Ln~5d_{3z^2-r^2}$| states form

    更新日期:2020-09-02
  • Anomalous strain effect on the thermal conductivity of low-buckled two-dimensional silicene
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Bin Ding; Xiaoyan Li; Wuxing Zhou; Gang Zhang; Huajian Gao

    The thermal conductivity of two-dimensional materials, such as graphene, typically decreases when tensile strain is applied, which softens their phonon modes. Here, we report an anomalous strain effect on the thermal conductivity of monolayer silicene, a representative low-buckled two-dimensional (LB-2D) material. ReaxFF-based molecular dynamics simulations are performed to show that biaxially stretched

    更新日期:2020-09-01
  • Aggregation-induced emission: challenges and opportunities
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Wenbo Wu; Bin Liu

    The rapid development of aggregation-induced emission (AIE) has opened new opportunities in many research fields. Herein, we summarized the latest achievements and challenges of AIE with solutions provided to show its great potential.

    更新日期:2020-09-01
  • Development of a space cold atom clock
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Wei Ren; Tang Li; Qiuzhi Qu; Bin Wang; Lin Li; Desheng Lü; Weibiao Chen; Liang Liu

    Atomic clocks with cold atoms play important roles in the field of fundamental physics as well as primary frequency standards. Operating such cold-atom clocks in space paves the way for further exploring in fundamental physics, for example dark matter and general relativity. We developed a space cold atom clock (SCAC), which was launched into orbit with the Space Lab TG-2 at 2016. Before it deorbited

    更新日期:2020-09-01
  • Finite-size Scaling of O(n) Systems at the Upper Critical Dimensionality*
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Jian-Ping Lv; Wanwan Xu; Yanan Sun; Kun Chen; Youjin Deng

    Logarithmic finite-size scaling of the O(n) universality class at the upper critical dimensionality (dc = 4) has a fundamental role in statistical and condensed-matter physics and important applications in various experimental systems. Here, we address this long-standing problem in the context of the n-vector model (n = 1, 2, 3) on periodic four-dimensional hypercubic lattices. We establish an explicit

    更新日期:2020-09-01
  • Engineering G-quadruplex aptamer to modulate its binding specificity
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Long Li; Shujuan Xu; Xueyu Peng; Yuzhuo Ji; He Yan; Cheng Cui; Xiaowei Li; Xiaoshu Pan; Lu Yang; Liping Qiu; Jianhui Jiang; Weihong Tan

    The use of aptamers in bioanalytical and biomedical applications exploits their ability to recognize cell surface protein receptors. Targeted therapeutics and theranostics come to mind in this regard. However, protein receptors occur on both cancer and normal cells; as such, aptamers are now taxed with identifying high vs. low levels of protein expression. Inspired by the flexible template mechanism

    更新日期:2020-09-01
  • Integrated dynamic wet spinning of core-sheath hydrogel fibers for optical-to-brain/tissue communications
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Guoyin Chen; Gang Wang; Xinrong Tan; Kai Hou; Qingshuo Meng; Peng Zhao; Shun Wang; Jiayi Zhang; Zhan Zhou; Tao Chen; Yanhua Cheng; Benjamin S Hsiao; Elsa Reichmanis; Zhu Meifang

    Hydrogel optical light-guides have received substantial interest for applications such as deep-tissue biosensors, optogenetic stimulation and photomedicine due to their biocompatibility, (micro)structure control and tissue-like Young's modulus. However, despite recent developments, the large-scale fabrication with a continuous synthetic methodology, which could produce core-sheath hydrogel fibers with

    更新日期:2020-09-01
  • Identification of the activity source of CO2 electroreduction by strategic catalytic site distribution in stable supramolecular structure system
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Sheng-Nan Sun; Ning Li; Jiang Liu; Wen-Xin Ji; Long-Zhang Dong; Yi-Rong Wang; Ya-Qian Lan

    Identification of the real catalytic site in CO2 reduction reaction (CO2RR) is critical for the rational design of catalyst and the understanding of reactive mechanism. In this study, the catalytic activity of pyridine-containing materials was for the first time structurally demonstrated in CO2RR by crystalline supramolecular coordination compounds model system. The system consists of three stable

    更新日期:2020-09-01
  • Precision Spectroscopy of Atomic Helium
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Y R Sun; S-M Hu

    Helium is a prototype three-body system and has long been a model system for developing quantum mechanics theory and computational methods. The fine structure splitting in the 23P state of helium is considered to be the most suitable for determining the fine structure constant α in atoms. After more than 50 years of efforts by many theorists and experimentalists, now we are working toward a determination

    更新日期:2020-09-01
  • Multi-layer 3D chirality: its enantioselective synthesis and aggregation-induced emission (AIE)
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Junliang Zhang; László Kürti

    Authors made equal contributions to this writing.

    更新日期:2020-09-01
  • Green fabrication of hierarchical zeolites from natural minerals
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Yuanyuan Yue; Haibo Zhu; Tinghai Wang; Xiaojun Bao

    Hierarchical zeolites are very useful and important catalytic materials and catalysts in petroleum refining and chemical production processes, but their synthesis faces serious economic and environmental challenges. This perspective describes a green and versatile strategy to directly synthesize various hierarchical zeolites with different topologies and hetero-atoms in their frameworks from natural

    更新日期:2020-09-01
  • Approaching aggregated state chemistry accelerated by aggregation-induced emission
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Yujun Xie; Zhen Li

    The foundation of aggregation-induced emission (AIE) has greatly affected the design strategies of luminous materials, and accelerated the relevant theoretical and practical application investigation. The AIE concept also inspires the exploration on “aggregated state chemistry” and enlightens new research areas of room-temperature phosphorescence and mechanoluminescence.

    更新日期:2020-09-01
  • Trapping endoplasmic reticulum with amphiphilic AIE-active sensor via specific interaction of ATP-sensitive potassium (KATP)
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Zhirong Zhu; Qi Wang; Hongze Liao; Ming Liu; Zhenxing Liu; Youheng Zhang; Wei-Hong Zhu

    The current aggregation-induced emission luminogens (AIEgens) sometimes suffer from poor targeting selectivity due to undesirable aggregation in hydrophilic biosystem with “always-on” fluorescence or unspecific aggregation in lipophilic organelle with premature activated fluorescence. Herein, we report an unprecedented “amphiphilic AIEgen” sensor QM-SO3-ER based on the AIE building block of quinoline-malononitrile

    更新日期:2020-09-01
  • Topological phases of quantized light
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-31
    Han Cai; Da-Wei Wang

    Topological photonics is an emerging research area that focuses on the topological states of classical light. Here we reveal the topological phases that are intrinsic to the quantum nature of light, i.e., solely related to the quantized Fock states and the inhomogeneous coupling strengths between them. The Hamiltonian of two cavities coupled with a two-level atom is an intrinsic one-dimensional Su-Schriefer-Heeger

    更新日期:2020-09-01
  • Co13O8—Metalloxocubes: A new class of perovskite-like neutral clusters with cubic aromaticity
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-29
    Lijun Geng; Mouyi Weng; Cong-Qiao Xu; Hanyu Zhang; Chaonan Cui; Haiming Wu; Xin Chen; Mingyu Hu; Hai Lin; Zhen-Dong Sun; Xi Wang; Han-Shi Hu; Jun Li; Jiaxin Zheng; Zhixun Luo; Feng Pan; Jiannian Yao

    Exploring stable clusters to understand structural evolution from atoms to macroscopic matter and to construct new materials is interesting yet challenging in chemistry. Utilizing our newly developed deep-ultraviolet laser ionization mass spectrometry technique, here we observe the reactions of neutral cobalt clusters with oxygen and find a very stable cluster species of Co13O8 that dominates the mass

    更新日期:2020-08-29
  • Diatom-inspired multiscale mineralization of patterned protein-polysaccharide complex structures
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-29
    Ke Li; Yingfeng Li; Xinyu Wang; Mengkui Cui; Bolin An; Jiahua Pu; Jintao Liu; Boyang Zhang; Guijun Ma; Chao Zhong

    Marine diatoms construct their hierarchically ordered, three-dimensional (3D) external structures called frustules through precise biomineralization processes. Recapitulating the remarkable architectures and functions of diatom frustules in artificial materials is a major challenge that has important technological implications for hierarchically ordered composites. Here, we report the construction

    更新日期:2020-08-29
  • Ultra-high piezoelectric coefficients and strain-sensitive curie temperature in hydrogen-bonded systems
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-28
    Yangyang Ren; Menghao Wu; Jun-Ming Liu

    We propose a new approach to obtain ultra-high piezoelectric coefficients that can be infinitely large theoretically, where ferroelectrics with strain-sensitive Curie temperature are necessary. We show the first-principles plus Monte Carlo simulation evidence that many hydrogen-bonded ferroelectrics (e.g. organic PhMDA) can be ideal candidates, which are also flexible and lead-free. Owing to the specific

    更新日期:2020-08-29
  • Graphdiyne based metal atomic catalysts for synthesizing ammonia
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-28
    Huidi Yu; Yurui Xue; Lan Hui; Chao Zhang; Yan Fang; Yuxin Liu; Xi Chen; Danyan Zhang; Bolong Huang; Yuliang Li

    Exploring new catalysts for nitrogen reduction at ambient pressures and temperatures with ultrahigh ammonia (NH3) yield and selectivity is still a giant challenge. In this work, atomic catalysts with separated Pd atoms on graphdiyne (Pd-GDY) have been synthesized and show fascinating electrocatalytic properties for nitrogen reduction. Outstandingly, the catalyst shows the highest average NH3 yield

    更新日期:2020-08-29
  • Ultra-small hollow ternary alloy nanoparticles for efficient hydrogen evolution reaction
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-28
    Zhenxing Li; Chengcheng Yu; Yikun Kang; Xin Zhang; Yangyang Wen; Zhao-Kui Wang; Chang Ma; Cong Wang; Kaiwen Wang; Xianlin Qu; Miao He; Ya-Wen Zhang; Weiyu Song

    Hollow nanoparticles with large specific surface area and high atom utilization are promising catalysts for the hydrogen evolution reaction (HER). We describe herein the design and synthesis of a series of ultra-small hollow ternary alloy nanostructures using a simple one-pot strategy. The same technique was demonstrated for hollow PtNiCu nanoparticles, hollow PtCoCu nanoparticles, and hollow CuNiCo

    更新日期:2020-08-29
  • What limits limits?
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-28
    Yong-Chun Liu; Kun Huang; Yun-Feng Xiao; Lan Yang; Cheng-Wei Qiu

    Physical systems are usually constrained by a variety of limits originating from fundamental physical laws. Breaking a limit typically represents a breakthrough in the related research field. We review different limits in physical systems and discuss the scenarios of “breaking the limit” in three categories, which clarify some mis-interpretations and ambiguities in the literatures.

    更新日期:2020-08-29
  • Two-dimensional characterization of three-dimensional nanostructures of magnetic bubbles in Fe3Sn2
    Natl. Sci. Rev. (IF 16.693) Pub Date : 2020-08-28
    Jin Tang; Yaodong Wu; Lingyao Kong; Weiwei Wang; Yutao Chen; Yihao Wang; Y Soh; Yimin Xiong; Mingliang Tian; Haifeng Du

    We report differential phase contrast scanning transmission electron microscopy (TEM) of nanoscale magnetic objects in Kagome ferromagnet Fe3Sn2 nanostructures. This technique can directly detect the deflection angle of a focused electron beam, thus allowing clear identification of the real magnetic structures of two magnetic objects including three-ring and complex arch-shaped vortices in Fe3Sn2 by

    更新日期:2020-08-29
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