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| 1 | Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption显示文摘Currently,electromagnetic(EM) pollution poses severe complication toward the operation of electronic devices and biological systems.To this end,it is pertinent to develop novel microwave absorbers through compositional and structural design.Porous carbon(PC)materials demonstrate great potential in EM wave absorption due to their ultralow density,large surface area,and excellent dielectric loss ability.However,the large-scale production of PC materials through low-cost and simple synthetic route is a challenge.Deriving PC materials through biomass sources is a sustainable,ubiquitous,and low-cost method,which comes with many desired features,such as hierarchical texture,periodic pattern,and some unique nanoarchitecture.Using the bio-inspired microstructure to manufacture PC materials in mild condition is desirable.In this review,we summarize the EM wave absorption application of biomass-derived PC materials from optimizing structureand designing composition.The corresponding synthetic mechanisms and development prospects are discussed as well.The perspective in this field is given at the end of the article. | Huanqin Zhao Yan Cheng Wei Liu Lieji Yang Baoshan Zhang Luyuan Paul Wang Guangbin Ji Zhichuan J.Xu | 2019 | Nano-Micro Letters2019，11，2： | 12 |
| 2 | Heterostructured Electrocatalysts for Hydrogen Evolution Reaction Under Alkaline Conditions显示文摘The hydrogen evolution reaction(HER) is a half-cell reaction in water electrolysis for producing hydrogen gas. In industrial water electrolysis, the HER is often conducted in alkaline media to achieve higher stability of the electrode materials. However, the kinetics of the HER in alkaline medium is slow relative to that in acid because of the low concentration of protons in the former.Under the latter conditions, the entire HER process will require additional effort to obtain protons by water dissociation near or on the catalyst surface. Heterostructured catalysts, with fascinating synergistic effects derived from their heterogeneous interfaces, can provide multiple functional sites for the overall reaction process. At present, the activity of the most active known heterostructured catalysts surpasses(platinum-based heterostructures) or approaches (noble-metal-free heterostructures) that of the commercial Pt/C catalyst under alkaline conditions, demonstrating an infusive potential to break through the bottlenecks. This review summarizes the most representative and recent heterostructured HER catalysts for alkaline medium. The basics and principles of the HER under alkaline conditions are first introduced, followed by a discussion of the latest advances in heterostructured catalysts with/without noblemetal-based heterostructures. Special focus is placed on approaches for enhancing the reaction rate by accelerating the Volmer step. This review aims to provide an overview of the current developments in alkaline HER catalysts, as well as the design principles for the future development of heterostructured nano-or micro-sized electrocatalysts. | Jumeng Wei Min Zhou Anchun Long Yanming Xue Hanbin Liao Chao Wei Zhichuan J.Xu | 2018 | Nano-Micro Letters2018，10，4： | 11 |
| 3 | Frozen Landweber Iteration for Nonlinear Ill-Posed Problems显示文摘In this paper we propose a modification of the Landweber iteration termed frozen Landweberiteration for nonlinear ill-posed problems.A convergence analysis for this iteration is presented.The numericalperformance of this frozen Landweber iteration for a nonlinear Hammerstein integral equation is compared withthat of the Landweber iteration.We obtain a shorter running time of the frozen Landweber iteration based onthe same convergence accuracy. | J.Xu B.Han L.Li | 2007 | Acta Mathematicae Applicatae Sinica2007，23，2： | 8 |
| 4 | Shear velocity structure of crust and uppermost mantle in China from surface wave tomography using ambient noise and earthquake data显示文摘We present a 3D model of shear velocity of crust and upper mantle in China and surrounding regions from surface wave tomography.We combine dispersion measurements from ambient noise correlation and traditional earthquake data.The stations include the China National Seismic Network,global networks,and all the available PASSCAL stations in the region over the years.The combined data sets provide excellent data coverage of the region for surface wave measurements from 8 to 120 s,which are used to invert for 3D shear wave velocity structure of the crust and upper mantle down to about150 km.We also derive new models of the study region for crustal thickness and averaged S velocities for upper,mid,and lower crust and the uppermost mantle.The models provide a fundamental data set for understanding continental dynamics and evolution.The tomography results reveal significant features of crust and upper mantle structure,including major basins,Moho depth variation,mantle velocity contrast between eastern and western North China Craton,widespread low-velocity zone in midcrust in much of the Tibetan Plateau,and clear velocity contrasts of the mantle lithosphere between north and southern Tibet with significant E–W variations.The low velocity structure in the upper mantle under north and eastern TP correlates with surface geological boundaries.A patch of high velocity anomaly is found under the eastern part of the TP,which may indicate intact mantle lithosphere.Mantle lithosphere shows striking systematic change from the western to eastern North China Craton.The Tanlu Fault appears to be a major lithosphere boundary. | Zhen J.Xu Xiaodong Song Sihua Zheng | 2013 | Earthquake Science2013，26，5： | 7 |
| 5 | High-power passively Q-switched 2 μm all-solid-state laser based on a Bi_2Te_3 saturable absorber显示文摘By using the ultrasound-assisted liquid phase exfoliation method, Bi_2Te_3 nanosheets are synthesized and deposited onto a quartz plate to form a kind of saturable absorber(SA), in which nonlinear absorption properties around 2 μm are analyzed with a home-made mode-locked laser. With the as-prepared Bi_2Te_3 SA employed,a stable passively Q-switched all-solid-state 2 μm laser is successfully realized. Q-switched pulses with a maximum average output power of 2.03 W are generated under an output coupling of 5%, corresponding to the maximum single-pulse energy of 18.4 μJ and peak power of 23 W. The delivered shortest pulse duration and maximum repetition rate are 620 ns and 118 k Hz under an output coupling of 2%, respectively. It is the first presentation of such Bi_2Te_3 SA employed in a solid-state Q-switched crystalline laser at 2 μm, to the best of our knowledge. In comparison with other 2 D materials suitable for pulsed 2 μm lasers, the saturable absorption performance of Bi_2Te_3 SA is proved to be promising in generating high power and high-repetition-rate 2 μm laser pulses. | X.LIU K.YANG S.ZHAO T.LI W.QIAO H.ZHANG B.ZHANG J.HE J.BIAN L.ZHENG L.SU J.XU | 2017 | Photonics Research2017，5，5： | 6 |
| 6 | Effects of water-aging for 6 months on the durability of a novel antimicrobial and protein-repellent dental bonding agent显示文摘Biofilms at the tooth-restoration bonded interface can produce acids and cause recurrent caries. Recurrent caries is a primary reason for restoration failures. The objectives of this study were to synthesize a novel bioactive dental bonding agent containing dimethylaminohexadecyl methacrylate(DMAHDM) and 2-methacryloyloxyethyl phosphorylcholine(MPC) to inhibit biofilm formation at the tooth-restoration margin and to investigate the effects of water-aging for 6 months on the dentin bond strength and protein-repellent and antibacterial durability. A protein-repellent agent(MPC) and antibacterial agent(DMAHDM) were added to a Scotchbond multi-purpose(SBMP) primer and adhesive. Specimens were stored in water at 37 °C for 1, 30, 90, or 180 days(d).At the end of each time period, the dentin bond strength and protein-repellent and antibacterial properties were evaluated. Protein attachment onto resin specimens was measured by the micro-bicinchoninic acid approach. A dental plaque microcosm biofilm model was used to test the biofilm response. The SBMP + MPC + DMAHDM group showed no decline in dentin bond strength after water-aging for 6 months, which was significantly higher than that of the control(P < 0.05). The SBMP + MPC + DMAHDM group had protein adhesion that was only 1/20 of that of the SBMP control(P < 0.05). Incorporation of MPC and DMAHDM into SBMP provided a synergistic effect on biofilm reduction. The antibacterial effect and resistance to protein adsorption exhibited no decrease from 1 to 180 d(P > 0.1). In conclusion, a bonding agent with MPC and DMAHDM achieved a durable dentin bond strength and long-term resistance to proteins and oral bacteria. The novel dental bonding agent is promising for applications in preventive and restorative dentistry to reduce biofilm formation at the tooth-restoration margin. | Ning Zhang Ke Zhang Michael D.Weir David J.Xu Mark A.Reynolds Yuxing Bai Hockin H.K.Xu | 2018 | International Journal of Oral Science2018，10，3： | 4 |
| 7 | Are blockchains immune to all malicious attacks?显示文摘Background:In recent years,blockchain technology has attracted considerable attention.It records cryptographic transactions in a public ledger that is difficult to alter and compromise because of the distributed consensus.As a result,blockchain is believed to resist fraud and hacking.Results:This work explores the types of fraud and malicious activities that can be prevented by blockchain technology and identifies attacks to which blockchain remains vulnerable.Conclusions:This study recommends appropriate defensive measures and calls for further research into the techniques for fighting malicious activities related to blockchains. | Jennifer J.Xu | 2016 | Financial Innovation2016，2，1： | 3 |
| 8 | From Two-Phase to Three-Phase: The New Electrochemical Interface by Oxide Electrocatalysts显示文摘Electrochemical reactions typically occur at the interface between a solid electrode and a liquid electrolyte. The charge exchange behaviour between these two phases determines the kinetics of electrochemical reactions. In the past few years, significant advances have been made in the development of metal oxide electrocatalysts for fuel cell and electrolyser reactions. However, considerable gaps remain in the fundamental understanding of the charge transfer pathways and the interaction between the metal oxides and the conducting substrate on which they are located. In particular, the electrochemical interfaces of metal oxides are significantly different from the traditional(metal) ones, where only a conductive solid electrode and a liquid electrolyte are considered. Oxides are insulating and have to be combined with carbon as a conductive mediator.This electrode configuration results in a three-phase electrochemical interface, consisting of the insulating oxide, the conductive carbon, and the liquid electrolyte. To date, the mechanistic insights into this kind of non-traditional electrochemical interface remain unclear. Consequently conventional electrochemistry concepts, established on classical electrode materials and their two-phase interfaces, are facing challenges when employed for explaining these new electrode materials. | Zhichuan J.Xu | 2018 | Nano-Micro Letters2018，10，1： | 2 |
| 9 | Grid-Partition Index:a Hybrid Method for Nearest-Neighbor Queries in Wireless Location-Based Services显示文摘 | B.Zheng J.Xu W.-C.Lee L.Lee | | 0，，： | 1 |
| 10 | The D-Tree:an Index Structure for Planar Point Queries in Location-Based Wireless Services显示文摘 | J.Xu B.Zheng W.-C.Lee D.L.Lee | | 0，，12： | 1 |
| 11 | Near-shannonlimit quasi-cyclic low-density parity-check codes显示文摘 | L.Chen J.Xu I.Djurdjevic S.Lin | | 0，，07： | 1 |
| 12 | Controlled Growth and Field‐Emission Properties of Cobalt Oxide Nanowalls显示文摘 | T.Yu Y.?W.Zhu X.?J.Xu Z.?X.Shen P.Chen C.‐T.Lim J.?T.‐L.Thong C.‐H.Sow | 2005 | Adv Mater2005，，13： | 1 |
| 13 | Neural-based dynamic modeling of nonlinear microwave circuits显示文摘 | J.Xu M.C.E.Yagoub R.Ding | | 0，，12： | 1 |
| 14 | LASER PLASMA ASSISTED CHEMICAL VAPOR DEPOSITIONOF SILICON NITRIDE ON STAINLESS STEEL显示文摘This study raised a new assisted technique used for chemical vapor deposition (CVD) in which a laser beam irradiated the surface of substrate and simultaneously the plasma surroundings created in the reactive room, but both laser and plasma were at lower energy level in order to perform easily. The chemical vapor deposition reaction could be performed only just using simultaneously above two assisted methods. If not, the reaction could not be performed, too. It is laser plasma assisted chemical vapor deposition (LPCVD). For these reasons, a LPCVD device had been designed and manufactured, and was carried on practical operation. The results indicated that this technique is successful and feasible. Acting on the system of SiH 4 NH 3 N 2 with both CO 2 laser and RF plasma, expectant film of silicon nitride had been obtained on the surface of stainless steel. | Z.Y. Lu 1) , S.M.An 2) , B.H.Cuo 2) , W.M.Li 1) , Y.Mei, Y.L.Xia 2) and J.Xu 2) 1) Department of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China 2) Dalian University of Technology, Dalian 116024, China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 1 |
| 15 | Association of IL‐1β and IL‐6 gene polymorphisms with recurrent spontaneous abortion in a Chinese Han population显示文摘 | X.Ma L.‐J.Xu J.Wang M.‐M.Xian M.Liu | 2012 | International Journal of Immunogenetics2012，，1： | 1 |
| 16 | Yield performances of japonica introgression lines selected for drought tolerance in a BC breeding programme显示文摘 | Y. X.He T. Q.Zheng X. B.Hao L. F.Wang Y. M.Gao Z. T.Hua H. Q.Zhai J. L.Xu Z. J.Xu L. H.Zhu Z. K.Li | 2010 | Plant Breeding2010，，2： | 1 |
| 17 | 查看详情显示文摘 | S.Liu J.Xu Y.Zhang L.Chen and C.Li | | 0，，： | 1 |
| 18 | Methanol electro-oxidation to formate on iron-substituted lanthanum cobaltite perovskite oxides显示文摘Electrochemically producing formate by oxidizing methanol is a promising way to add value to methanol.Noble metal-based electrocatalysts,which have been extensively studied for the methanol oxidation reaction,can catalyze the complete oxidation of methanol to carbon dioxide,but not the mild oxidation to formate.As a result,exploring efficient and earth-abundant electrocatalysts for formate production from methanol is of interest.Herein,we present the electro-oxidation of methanol to formate,catalyzed by iron-substituted lanthanum cobaltite(LaCo_(1-x)Fe_(x)O_(3)).The Fe/Co ratio in the oxides greatly influences the activity and selectivity.This effect is attributed to the higher affinity of Fe and Co to the two reactants:CH3OH and OH,respectively.Because a balance between these affinities is favored,LaCo_(0.5)Fe_(0.5)O_(3) shows the highest formate production rate,at 24.5 mmol h^(-1) g_(oxide)^(-1),and a relatively high Faradaic efficiency of 44.4%in a series of(LaCo_(1-x)Fe_(x)O_(3))samples(x=0.00,0.25,0.50,0.75,1.00)at 1.6 V versus a reversible hydrogen electrode. | Fanxu Meng Chencheng Dai Zheng Liu Songzhu Luo Jingjie Ge Yan Duan Gao Chen Chao Wei Riccardo Ruixi Chen Jiarui Wang Daniel Mandler Zhichuan J.Xu | 2022 | eScience2022，2，1： | 1 |
| 19 | Preparation of CuS nanoparticles embedded in poly(vinyl alcohol)nanofibre via electrospinning显示文摘 | J.Xu X.J.Cui J.F.Li | | 0，，02： | 1 |
| 20 | Profiling and imaging proteins in the mouse epididymis by imaging mass spectrometry显示文摘 | PierreChaurand SophieFouchécourt Beverly B.DaGue Baogang J.Xu Michelle L.Reyzer Marie‐ClaireOrgebin‐Crist Richard M.Caprioli | 2003 | Proteomics2003，，11： | 1 |
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