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| 1 | Investigation of Surface Integrity on TC17 Titanium Alloy Treated by Square-spot Laser Shock Peening显示文摘Laser shock peening(LSP) is an innovative surface treatment method,which has been shown to greatly improve the fatigue life of many metallic components.This work investigates surface integrity of TC17 titanium alloy treated by LSP with innovative square laser spot.Nd:glass laser with duration of 30 ns and spot size of 4 mm×4 mm is applied.The surface morphology and surface residual stress of the TC17 titanium alloy,treated with varying peening parameters such as laser power density and overlapping ratio,have been studied in detail.The results show that laser pulse energy greatly influences surface morphology and surface residual stress around single-spot treated areas,and compressive residual stresses are saturated as laser pulse energy is over 55 J.There are significantly different surface morphologies and residual stress distributions at the overlapped areas with different overlapping ratios.A relative smooth surface is produced with uniform compressive residual stress distribution at an overlapping ratio of 8 %.The experiment of residual stress relaxation is implemented by measuring residual stress at the center of four overlapped spots and by four point bending fatigue test at the frequency of 105 Hz.The compressive residual stresses induced by LSP are found to relax quite slowly under cyclic fatigue loading. | CAO Ziwen XU Haiying ZOU Shikun CHE Zhigang | 2012 | Chinese Journal of Aeronautics2012，25，4： | 27 |
| 2 | Nanostructured thermoelectric materials:Current research and future challenge | Zhigang Chen Guang Han Lei Yang Lina Cheng Jin Zou | 2012 | Progress in Natural Science:Materials International2012，22，6： | 17 |
| 3 | Super stable CsPbBr3@SiO2 tumor imaging reagent by stress-response encapsulation显示文摘Great photoelectric properties can herald the high potentials of CsPbBr3 nanocrystals(NCs)to function as the fluorescent probes for early tumor diagnosis.However,the intrinsic water vulnerability of CsPbBr3 NCs highly restricts their biomedical applications.To conquer this challenge,we herein introduce a nature inspired'stress-response'method to tightly encapsulate CsPbBr3 into SiO2 nano-shells that can dramatically improve the water stability of CsPbBr3@SiO2 nanoparticles for over 48 h.We further highlighted the advantageous features of CsPbBr3@SiO2 by using them as the fluorescent probes for CT26 tumor cell imaging with their high water stability,biocompatibility,and low cytotoxicity.Our work for the first time exhibited the potential of lead halide perovskite NCs for tumor diagnosis,and can highly anticipate the further in vivo biomedical applications that light up live cells. | Wentao Song Yiming Wang Bing Wang Yingfang Yao Wenguang Wang Jinhui Wu Qing Shen Wenjun Luo Zhigang Zou | 2020 | Nano Research2020，13，3： | 7 |
| 4 | Tim-3 promotes cell aggressiveness and paclitaxel resistance through NF-κB/STAT3 signalling pathway in breast cancer cells显示文摘Objective:Although T-cell immunoglobulin and mucin-domain containing molecule-3(Tim-3)has been recognized as a promising target for cancer immunotherapy,its exact role in breast cancer has not been fully elucidated.Methods:Tim-3 gene expression in breast cancer and its prognostic significance were analyzed.Associated mechanisms were then explored in vitro by establishing Tim-3-overexpressing breast cancer cells.Results:In a pooled analysis of The Cancer Genome Atlas(TCGA)database,Tim-3 gene expression levels were significantly higher(P<0.001)in breast cancer tissue,compared with normal tissues.Tim-3 was a prognosis indicator in breast cancer patients[relapse-free survival(RFS),P=0.004;overall survival(OS),P=0.099].Tim-3 overexpression in Tim-3 low breast cancer cells promoted aggressiveness of breast cancer cells,as evidenced by enhanced proliferation,migration,invasion,tight junction deterioration and tumor-associated tubal formation.Tim-3 also enhanced cellular resistance to paclitaxel.Furthermore,Tim-3 exerted its function by activating the NF-κB/STAT3 signalling pathway and by regulating gene expression[cyclin D1(CCND1),C-Myc,matrix metalloproteinase-1(MMP1),TWIST,vascular endothelial growth factor(VEGF)upregulation,concomitant with Ecadherin downregulation).Lastly,Tim-3 downregulated tight junction-associated molecules zona occludens(ZO)-2,ZO-1 and occludin,which may further facilitate tumor progression.Conclusions:Tim-3 plays an oncogenic role in breast cancer and may represent a potential target for antitumor therapy. | Yizi Cong Yuxin Cui Shiguang Zhu Jianqiao Cao Haidong Zou Tracey AMartin Guangdong Qiao Wenguo Jiang Zhigang Yu | 2020 | Chinese Journal of Cancer Research2020，32，5： | 7 |
| 5 | A micro-scale strain rosette for residual stress measurement by SEM Moiré method显示文摘In this paper,a new method combining focused ion beam(FIB)and scanning electron microscope(SEM)Moirétechnique for the measurement of residual stress at micro scale is proposed.The FIB is employed to introduce stress relief like the macro ring-core method and fabricate gratings with a frequency of 5000 lines/mm on the measured area of the sample surface.Three groups of gratings in different radial directions are manufactured in order to form a micro-scale strain rosette.After milling ring-core by FIB,the deformation incurred by relief of the stress will be recorded with the strain rosette.The displacement/strain field can be measured using SEM scanning Moiréwith random phase-shifting algorithm.In this study,the Nickel alloy GH4169 sample(which was processed by laser shock peening)is selected as a study object to determine its residual stress.The results showed that the components of the in-plane principal stresses were-359 MPa and-207 MPa,respectively,which show good agreement with the results obtained from the available literature. | ZHU RongHua XIE HuiMin ZHU JianGuo LI YanJie CHE ZhiGang ZOU ShiKun | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，4： | 6 |
| 6 | Facile grafting strategy synthesis of single-atom electrocatalyst with enhanced ORR performance显示文摘Single-atom catalysts(SACs)have become one of the most considered research directions today,owing to their maximum atom utilization and simple structures,to investigate structure-activity relationships.In the field of non-precious-metal electrocatalysts,atomically dispersed Fe-N4 active sites have been proven to possess the best oxygen reduction activity.Yet the majority of preparation methods remains complex and costly with unsatisfying controllability.Herein,we have designed a surface-grafting strategy to directly synthesize an atomically dispersed Fe-NVC electrocatalyst applied to the oxygen reduction reaction(ORR).Through an esterification process in organic solution,metal-containing precursors were anchored on the surface of carbon substrates.The covalent bonding effect could suppress the formation of aggregated particles during heat treatment.Melamine was further introduced as both a cost-effective nitrogen resource and blocking agent retarding the migration of metal atoms.The optimized catalyst has proven to have abundant atomically dispersed Fe-N4 active sites with enhanced ORR catalytic performance in acid condition.This method has provided new feasible ideas for the synthesis of SACs. | Rui Ding Yide Liu Zhiyan Rui Jia Li Jianguo Liu Zhigang Zou | 2020 | Nano Research2020，13，6： | 6 |
| 7 | Ripple-effect analysis for operational architecture of air defense systems with supernetwork modeling显示文摘In order to solve the problem that the ripple-effect analysis for the operational architecture of air defense systems(OAADS)is hardly described in quantity with previous modeling approaches,a supernetwork modeling approach for the OAADS is put forward by extending granular computing. Based on that operational units and links are equal to different information granularities, the supernetwork framework of the OAADS is constructed as a 'fournetwork within two-layer' structure by forming dynamic operating coalitions, and measuring indexes of the ripple-effect analysis for the OAADS are given combining with Laplace spectral radius. In this framework, via analyzing multidimensional attributes which inherit relations between operational units in different granular scales, an extended granular computing is put forward integrating with a topological structure. Then the operation process within the supernetwork framework, including transformation relations between two layers in the vertical view and mapping relations among functional networks in the horizontal view, is studied in quantity. As the application case shows, comparing with previous modeling approaches, the supernetwork model can validate and analyze the operation mechanism in the air defense architecture, and the ripple-effect analysis can be used to confirm the key operational unit with micro and macro viewpoints. | Zhigang Zou Fuxian Liu Shiman Sun Lu Xia Chengli Fan | 2014 | Journal of Systems Engineering and Electronics2014，25，2： | 5 |
| 8 | Morphological control of SnTe nanostructures by tuning catalyst composition显示文摘A method of controlling the morphology of SnTe nanostructures produced by a simple chemical vapor deposition is presented, in which Au-containing catalysts with different Au concentrations are used to induce specific growth behavior. Triangular SnTe nanoplates with a {100} dominated surface and {100}, {111} and {120} side facets were induced by AuSn catalysts, whereas 〈010〉 SnTe nanowires with four nonpolar {100} side-facets were produced using AusSn catalysts. Through detailed structural and chemical characterization, coupled with surface energy calculations, it is found that nanowire growth is thermodynamically controlled via a vapor-solid-solid growth mechanism, whereas nanoplate growth is kinetically controlled via a vapor-liquid-solid growth mechanism. Therefore, this study provides a fundamental understanding of the catalyst's role in the growth of IV-VI compound nanostructures. | Yichao Zou Zhigang Chen Jing Lin Xiaohao Zhou Wei Lu John Drennan Jin Zou | 2015 | Nano Research2015，8，9： | 4 |
| 9 | Size,morphology,and composition of lunar samples returned by Chang'E-5 mission显示文摘This study focuses on the physical and chemical properties of surficial lunar regolith(LR)samples returned from the Moon by the Chang’E-5(CE-5)mission.Insights regarding the effect of a new sampling geological site on the surficial lunar sample CE5 C0400 were illustrated using nondestructive techniques such as laser diffractometry coupled with image analysis,X-ray computed tomography,and field emission scanning electron microscopy equipped with energy dispersive spectroscopy,and Xray diffraction combined with Rietveld refinement.From the characterization analyses,the CE-5 sampling site in the northeastern Oceanus Procellarum on the Moon yields a unique collection of relatively regular-shaped and fine basalt-dominated particles.The median grain size D_(50) is(55.24±0.96)μm,falling within the relatively low end of the range of the Apollo lunar returned samples.The coefficient of uniformity C_(u)of 15.1 and the coefficient of curvature C_(c)of 1.7 could classify CE5 C0400 to be well-graded.The minerals in CE5 C0400 comprise approximately 44.5%pyroxene,30.4%plagioclase,3.6%olivine,and6.0%ilmenite.There is a relatively low content of approximately 15.5%glass phase in the CE-5 lunar sample.From the results,we deduce that the CE-5 LR structure could have mainly resulted from micrometeoroid impacts to achieve such a high level of maturity. | Hui Zhang Xian Zhang Guang Zhang Keqi Dong Xiangjin Deng Xiaosong Gao Yaodong Yang Yuan Xiao Xiao Bai Kaixin Liang Yiwei Liu Wenbin Ma Shaofan Zhao Ce Zhang Xiaojing Zhang Jian Song Wei Yao Hong Chen Weihua Wang Zhigang Zou Mengfei Yang | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，2： | 4 |
| 10 | Numerical study on the evolution of the shock-accelerated SF_6 interface:Influence of the interface shape显示文摘The early phases of the shock interaction process on two-dimensional interfaces with different shapes are numerically investigated in this study,which are closely related to the shock refraction and reflection,vorticity production and transport.The numerical method employs an adaptive unstructured quadrilateral mesh,which can capture the wave pattern and interface evolution very well.Simulations are carried out under the conditions of an incident shock Mach number of 1.2 and the light/heavy (air/SF 6) interface.Five different shapes are considered in the simulations:rectangle,ellipse,diamond and two kinds of triangle.The results show that the interfacial shapes can influence the wave patterns particularly on the shape and evolution of refracted shock waves.The generation and the distribution of vorticity on the interfaces with five different shapes also have dissimilarities.The circulation deposition on five interfaces is quantitatively investigated and compared with theoretical model.A good agreement is found between the numerical results and the predictions by the theoretical model.Some characteristic scales of the interface are tracked.Under the influence of nonlinear-acoustic effect and vorticity effect,the interfaces present different evolution modes. | FAN MeiRu ZHAI ZhiGang SI Ting LUO XiSheng ZOU LiYong TAN DuoWang | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，2： | 4 |
| 11 | Wafer-scale arrayed p-n junctions based on few-layer epitaxial GaTe显示文摘二维(2D ) 材料吸引了实质的注意在电子并且有灵活、透明、高度悦耳的优异优点的 optoelectronic 应用。当时,无差距的 graphene 展出极端宽带、快的 photoresponse 半导体的瞬间 2 和门高展出的 2D 敏感和悦耳的 responsivity 到可见的光。然而,设备收益和重覆性打电话让进一步的改进完成大规模一致性。这里,我们与 28.4 厘米 2/(V0 的高洞活动性报导晶片规模门的 layer-by-layer | Xiang Yuan Lei Tang Peng Wang Zhigang Chen Yichao Zou Xiaofeng Su Cheng Zhang Yanwen Liu Weiyi Wang Cong Liu Fansheng Chen Jin Zou Peng Zhou Weida Hu Faxian Xiu | 2015 | Nano Research2015，8，10： | 4 |
| 12 | Scalable and facile synthesis of V_(2)O_(5) nanoparticles via ball milling for improved aerobic oxidative desulfurization显示文摘In recent years, transition-metal oxides(TMOs) have been long employed for aerobic oxidative desulfurization. However, the inherent bottlenecks, such as the low explosion of active sites, limit the application of bulk TMOs catalyst. In this study, V_(2)O_(5) nanoparticles with oxygen vacancies were prepared in large-scale via facile ball milling strategy with adding oxalic acid as a reducing agent. The as-prepared catalysts exhibit remarkable sulfur removal for oils with different initial S-concentrations and different substrates. Sulfur removal could reach up to 99.7%(< 2 ppm) under the optimized reaction conditions. This work provides a feasible desulfurization strategy for fuel oils. | Yiru Zou Chao Wang Hanxiang Chen Haiyan Ji Qian Zhu Wenshu Yang Linlin Chen Zhigang Chen Wenshuai Zhu | 2021 | Green Energy & Environment2021，6，2： | 4 |
| 13 | Peniazaphilones A—I,Produced by Co-culturing of Mangrove Endophytic Fungi,Penicillium sclerotiorum THSH-4 and Penicillium sclerotiorum ZJHJJ-18显示文摘Co-culturing the mangrove endophytic fungus Penicillium sclerotiorum THSH-4 with Penicillium sclerotiorum ZJHJJ-18 in PDB medium resulted in the production of nine new azaphilones derivatives,peniazaphilones A—I(1-9),and six known azaphilones derivatives(10-15).Their structures were elucidated by analysis of detailed spectroscopic data,single-crystal X-ray diffraction,ECD spectra,^(13)C NMR calculation and DP4+analysis.It is noteworthy that compound 1 with an isoquinoline quinone moiety,was isolated from natural source for the first time.Besides,compound 2 is the third reported phenylhydrazone derivative from fungi.In the bioactivity assays,compounds 1,12,14 and 15(IC_(50)=4.71-17.64μmol/L)exhibited potent inhibition of LPS-induced NO release from RAW264.7 without obvious cytotoxicity within 50μmol/L compared to the positive control indomethacin(IC_(50)=35.27μmol/L).Moreover,compounds 1 and 13 displayed moderate to strong cytotoxicity to A549 and MDA-MB-435,with IC_(50) values in the range of 6.84-14.63μmol/L.Together compound 1 showed moderate broad-spectrum antibacterial activity. | Wencong Yang Jie Yuan Qi Tan Yan Chen Yujia Zhu Hongming Jiang Ge Zou Zhenming Zang Bo Wang Zhigang She | 2021 | Chinese Journal of Chemistry2021，39，12： | 3 |
| 14 | Network Virtualization Based Seamless Networking Scheme for Fiber-Wireless (FiWi) Networks显示文摘In order to reduce cost and complexity,fiber-wireless(FiWi) networks emerge,combining the huge amount of available bandwidth of fiber networks and the flexibility,mobility of wireless networks.However,there is still a long way to go before taking fiber and wireless systems as fully integrated networks.In this paper,we propose a network visualization based seamless networking scheme for FiWi networks,including hierarchical model,service model,service implementation and dynamic bandwidth assignment(DBA).Then,we evaluate the performance changes after network virtualization is introduced.Throughput for nodes,bandwidth for links and overheads leaded by network virtualization are analyzed.The performance of our proposed networking scheme is evaluated by simulation and real implementations,respectively.The results show that,compared to traditional networking scheme,our scheme has a better performance. | DAI Qinglong ZOU Jianfeng SHOU Guochu HU Yihong GUO Zhigang | 2014 | China Communications2014，11，5： | 3 |
| 15 | Nanostructured SnO_2 photoanode-based dye-sensitized solar cells显示文摘This review focuses on recent developments in the nanostructured SnO2 photoanodes for dye-sensitized solar cells(DSSCs)applications.Carefully designed and fabricated nanostructured SnO2films are advantageous for effective improvement in performance of DSSCs.Nanocrystals can offer a large surface area for dye adsorption;nanowires are able to provide a direct transfer pathway for the rapid collection of photogenerated electrons;the mesoporous,monodisperse beads with a submicrometer-sized diameter ensure a large specific surface area for dye adsorption and simultaneously promote light scattering;the surface modification of SnO2by other oxides may improve the photovoltage and photocurrent,hence resulting in the higher power conversion efficiency of SnO2-based DSSCs. | Zhengdao Li Yong Zhou Ruzhong Sun Yan Xiong Haiquan Xie Zhigang Zou | 2014 | Chinese Science Bulletin2014，59，18： | 3 |
| 16 | Paving the road toward the use ofβ-Fe2O3 in solar water splitting:Raman identification,phase transformation and strategies for phase stabilization显示文摘Althoughβ-Fe2O3 has a high theoretical solar-to-hydrogen efficiency because of its narrow band gap,the study ofβ-Fe2O3 photoanodes for water splitting is elusive as a result of their metastable nature.Raman identification ofβ-Fe2O3 is theoretically and experimentally investigated in this study for the first time,thus clarifying the debate about its Raman spectrum in the literature.Phase transformation ofβ-Fe2O3 toα-Fe2O3 was found to potentially take place under laser and electron irradiation as well as annealing.Herein,phase transformation ofβ-Fe2O3 toα-Fe2O3 was inhibited by introduction of Zr doping,andβ-Fe2O3 was found to withstand a higher annealing temperature without any phase transformation.The solar water splitting photocurrent of the Zr-dopedβ-Fe2O3 photoanode was increased by 500%compared to that of the pureβ-Fe2O3 photoanode.Additionally,Zr-dopedβ-Fe2O3 exhibited very good stability during the process of solar water splitting.These results indicate that by improving its thermal stability,metastableβ-Fe2O3 film is a promising photoanode for solar water splitting. | Ningsi Zhang Xin Wang Jianyong Feng Huiting Huang Yongsheng Guo Zhaosheng Li Zhigang Zou | 2020 | National Science Review2020，7，6： | 3 |
| 17 | Extraterrestrial artificial photosynthetic materials for in-situ resource utilization显示文摘Aerospace milestones in human history,including returning to the moon and manned Martian missions,have been implemented in recent years.Space exploration has become one of the global common goals,and to ensure the survival and development of human beings in the extraterrestrial extreme environment has been becoming the basic ability and technology of manned space exploration.For the purpose of fulfilling the goal of extraterrestrial survival,researchers in Nanjing University and the China Academy of Space Technology proposed extraterrestrial artificial photosynthesis(EAP)technology.By simulating the natural photosynthesis of green plants on the Earth,EAP converts CO_(2)/H_(2)O into fuel and O_(2)in an in-situ,accelerated and controllable manner by using waste CO_(2)in the confined space of spacecraft,or abundant CO_(2)resources in extraterrestrial celestial environments,e.g.Mars.Thus,the material loading of manned spacecraft can be greatly reduced to support affordable and sustainable deep space exploration.In this paper,EAP technology is compared with existing methods of converting CO_(2)/H_(2)O into fuel and O_(2)in the aerospace field,especially the Sabatier method and Bosch reduction method.The research progress of possible EAP materials for in-situ utilization of extraterrestrial resources are also discussed in depth.Finally,this review lists the challenges that the EAP process may encounter,which need to be focused on for future implementation and application.We expect to deepen the understanding of artificial photosynthetic materials and technologies,and aim to strongly support the development of manned spaceflight. | Liuqing Yang Ce Zhang Xiwen Yu Yingfang Yao Zhaosheng Li Congping Wu Wei Yao Zhigang Zou | 2021 | National Science Review2021，8，8： | 3 |
| 18 | Exploring facile strategies for high-oxidation-state metal nitride synthesis: carbonate-assisted one-step synthesis of Ta_3N_5 films for solar water splitting显示文摘Metal nitrides are widely studied due to their outstanding physical properties, including high hardness,high thermal and chemical stability, low electrical resistivity etc. Generally, metal nitrides can be obtained from the direct reaction of metal and ammonia/nitrogen. However, some of the metal nitrides,such as Ta_3N_5, cannot be synthesized by direct nitridation of metals. To achieve Ta_3N_5, high-oxidationstate Ta precursors like Ta_2O_5, NaTaO_3, TaS_3, K_6Ta_(10.8)O_(30), Ta(N(CH_3)_2)_5 and TaCl_5 have to be employed,which is a time-consuming and laborious process with the possibility of introducing undesirable impurities. Here taking Ta_3N_5 as an example, a facile carbonate-assisted one-step nitridation method is proposed, which enables the direct synthesis of high-oxidation-state metal nitride films from metal precursors under ammonia flow. The mechanism of the nitridation process has been studied, which carbon dioxide released from carbonates decomposition reacts with metallic Ta and assists the one-step conversion of metallic Ta to Ta_3N_5. The as-prepared Ta_3N_5 film, after modified with NiFe layered double hydroxide, exhibits promising water splitting performance and stability. This method avoids the preoxidation process of metal precursors in high-oxidation-state metal nitride synthesis, and may facilitate the direct fabrication of other important metal nitrides besides Ta_3N_5. | Tao Fang Huiting Huang Jianyong Feng Yingfei Hu Yongsheng Guo Shiying Zhang Zhaosheng Li Zhigang Zou | 2018 | Science Bulletin2018，63，21： | 3 |
| 19 | Taking advantage of glass:capturing and retaining the helium gas on the moon显示文摘Helium-3(3He)is a noble gas that has critical applications in scientific research and promising application potential as clean fusion energy.It is thought that the lunar regolith contains large amounts of helium,but it is challenging to extract because most helium atoms are reserved in defects of crystals or as solid solutions.Here,we find large amounts of helium bubbles in the glassy surface layer of ilmenite particles that were brought back by the Chang’E-5 mission.The special disordered atomic packing structure of glasses should be the critical factor for capturing the noble helium gas.The reserves in bubbles do not require heating to high temperatures to be extracted.Mechanical methods at ambient temperatures can easily break the bubbles.Our results provide insights into the mechanism of helium gathering on the moon and offer guidance on future in situ extraction. | Ao Li Xiao Chen Lijian Song Guoxin Chen Wei Xu Juntao Huo Meng Gao Ming Li Lei Zhang Bingnan Yao Min Ji Yan Zhang Shaofan Zhao Wei Yao Yanhui Liu Jun-Qiang Wang Haiyang Bai Zhigang Zou Mengfei Yang Weihua Wang | 2022 | Materials Futures2022，1，3： | 2 |
| 20 | Study of the location of testing area in residual stress measurement by Moiré interferometry combined with hole-drilling method显示文摘This paper investigates the effect of the location of testing area in residual stress measurement by Moiréinterferometry combined with hole-drilling method.The selection of the location of the testing area is analyzed from theory and experiment.In the theoretical study,the factors which affect the surface released radial strainεr were analyzed on the basis of the formulae of the hole-drilling method,and the relations between those factors andεr were established.By combining Moiréinterferometry with the hole-drilling method,the residual stress of interference-fit specimen was measured to verify the theoretical analysis.According to the analysis results,the testing area for minimizing the error of strain measurement is determined.Moreover,if the orientation of the maximum principal stress is known,the value of strain will be measured with higher precision by the Moiréinterferometry method. | QIN Le XIE HuiMin ZHU RongHua WU Dan CHE ZhiGang ZOU ShiKun | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，4： | 2 |
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