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| 1 | Effects of water management on arsenic and cadmium speciation and accumulation in an upland rice cultivar显示文摘Pot and field experiments were conducted to investigate the effects of water regimes on the speciation and accumulation of arsenic(As) and cadmium(Cd) in Brazilian upland rice growing in soils polluted with both As and Cd. In the pot experiment constant and intermittent flooding treatments gave 3–16 times higher As concentrations in soil solution than did aerobic conditions but Cd showed the opposite trend. Compared to arsenate, there were more marked changes in the arsenite concentrations in the soil solution as water management shifted, and therefore arsenite concentrations dominated the As speciation and bioavailability in the soil. In the field experiment As concentrations in the rice grains increased from 0.14 to 0.21 mg/kg while Cd concentrations decreased from 0.21 to 0.02 mg/kg with increasing irrigation ranging from aerobic to constantly flooding conditions. Among the various water regimes the conventional irrigation treatment produced the highest rice grain yield of 6.29 tons/ha. The As speciation analysis reveals that the accumulation of dimethylarsinic acid(from 11.3% to 61.7%) made a greater contribution to the increase in total As in brown rice in the intermittent and constant flooding treatments compared to the intermittent-aerobic treatment. Thus, water management exerted opposite effects on Cd and As speciation and bioavailability in the soil and consequently on their accumulation in the upland rice. Special care is required when irrigation regime methods are employed to mitigate the accumulation of metal(loid)s in the grain of rice grown in soils polluted with both As and Cd. | Pengjie Hu Younan Ouyang Longhua Wu Libo Shen Yongming Luo Peter Christie | 2015 | Journal of Environmental Sciences2015，27，1： | 43 |
| 2 | Synthesis of Pd Nanocrystals Enclosed by {100} Facets and with Sizes 〈10 nm for Application in CO Oxidation显示文摘 | Mingshang Jin Hongyang Liu Hui Zhang Zhaoxiong Xie Jingyue Liu Younan Xia | 2011 | Nano Research2011，4，1： | 24 |
| 3 | Nucleation and Growth Mechanisms for Pd-Pt Bimetallic Nanodendrites and Their Electrocatalytic Properties显示文摘In a seed-mediated synthesis, nanocrystal growth is often described by assuming the absence of homogeneous nucleation in the solution. Here we provide new insights into the nucleation and growth mechanisms underlying the formation of bimetallic nanodendrites that are characterized by a dense array of Pt branches anchored to a Pd nanocrystal core. These nanostructures can be easily prepared by a one-step, seeded growth method that involves the reduction of K2PtCl4 by L-ascorbic acid in the presence of 9-nm truncated octahedral Pd seeds in an aqueous solution. Transmission electron microscopy (TEM) and high-resolution TEM analyses revealed that both homogeneous and heterogeneous nucleation of Pt occurred at the very early stages of the synthesis and the Pt branches grew through oriented attachment of small Pt particles that had been formed via homogeneous nucleation. These new findings contradict the generally accepted mechanism for seeded growth that only involves heterogeneous nucleation and simple growth via atomic addition. We have also investigated the electrocatalytic properties of the Pd-Pt nanodendrites for the oxygen reduction and formic acid oxidation reactions by conducting a comparative study with foam-like Pt nanostructures prepared in the absence of Pd seeds under otherwise identical conditions. | Byungkwon Lim Majiong Jiang Taekyung Yu Pedro H.C.Camargo Younan Xia | 2010 | Nano Research2010，3，2： | 17 |
| 4 | Shape-controlled syntheses of rhodium nanocrystals for the enhancement of their catalytic properties显示文摘金老(Rh ) 是为许多化学转变过程的许多催化剂的一个批评部件。控制 Rh nanocrystals 的形状由于在催化活动 / 选择和表面之间的靠近的关联把一条有效线路提供给他们的催化表演的优化原子结构。它也帮助实质地减少装载数量并且因此完成这少见、宝贵的金属的持续使用。在这篇评论文章,我们旨在提高他们的催化性质在 Rh nanocrystals 的控制形状的合成集中于最近的进步。传统、最新开发的合成策略和生长机制将基于盖住代理人,减小动力学的操作,表面散开率的控制,蚀刻的氧化的管理,和电气化学的改变的表面的使用被讨论,包括那些。我们也使用二个例子加亮控制形状的合成为在催化应用提高这金属的使用提供的唯一的机会。策略能也被扩大到另外的宝贵金属以推进划算的催化剂的生产。 | Shuifen Xie Xiang Yang Liu Younan Xia | 2015 | Nano Research2015，8，1： | 10 |
| 5 | Gold nanocages as multifunctional materials for nanomedicine显示文摘在在红外线附近的区域和空内部由悦耳的局部性的表面电浆子回声山峰展示了, Au nanocages 代表在最近的年里获得了可观的注意的多功能的 nanomaterials 的一个新奇的班。这短评论在 nanomedicine 在 Au nanocages 的能力上总结我们的最近的工作。我们以对 Au nanocages 的合成的简短描述开始并且为 Au nanocages 的可伸缩起来的生产加亮我们的最近的协议。我们然后使用很多个例子说明 Au nanocages 怎么能关于诊断和治疗贡献 nanomedicine。 | Xiaohu Xia | 2014 | Frontiers of physics2014，9，3： | 6 |
| 6 | Rational design and synthesis of noble-metal nanoframes for catalytic and photonic applications显示文摘Nanoframes are unique for their 3D,highly open architecture.When made of noble metals,they are atractive for use as heterogeneous catalysts because of their large speciic surface areas,high densities of catalytically active sites and low vulnerability toward sintering.hey promise to enhance the catalytic activity and durability while reducing the material loading and cost.For nanoframes composed of Au and/or Ag,they also exhibit highly tunable plasmonic properties similar to those of nanorods.his article presents a brief account of recent progress in the design,synthesis and utilization of noble-metal nanoframes.We start with a discussion of the synthetic strategies,including those involving site-selected deposition and etching,as well as dealloying of both hollow and solid nanocrystals.We then highlight some of the applications enabled by noble-metal nanoframes.Finally,we discuss the challenges and trends with regard to future development. | Xue Wang Aleksey Ruditskiy Younan Xia | 2016 | National Science Review2016，3，4： | 4 |
| 7 | Growth and Patterning of Pt Nanowires on Silicon Substrates显示文摘This paper describes a simple procedure for growing dense fi lms of Pt nanowires directly on silicon substrates by modifying the surface through chemical or physical means.In the former,a self-assembled monolayer of(3-mercaptopropyl)-trimethoxysilane(MPTMS)is applied which can strongly bind Pt(0)nuclei to the surface through Pt S linkages.Once attached,the Pt(0)nuclei can act as catalytic sites for the growth of Pt nanowires along the〈111〉direction.Alternately,relief features are physically created on the surface in order to generate nucleation and binding sites for Pt(0)nuclei,due to the higher free energy associated with a rough surface.Additionally,Pt nanowires have been successfully produced in well-defined patterns by scouring grooves on the silicon surface or by photochemically patterning the MPTMS monolayers with a shadow mask.We have also measured the electrochemical properties of these immobilized or patterned Pt nanowires.The results provide an effective route to producing dense fi lms of Pt nanowires with high surface areas for various electrochemical applications. | Eric P.Lee Younan Xia | 2008 | Nano Research2008，1，2： | 3 |
| 8 | Synthesis and Optical Properties of Cubic Gold Nanoframes显示文摘This paper describes a facile method of preparing cubic Au nanoframes with open structures via the galvanic replacement reaction between Ag nanocubes and AuCl_(2)^(-).A mechanistic study of the reaction revealed that the formation of Au nanoframes relies on the diffusion of both Au and Ag atoms.The effect of the edge length and ridge thickness of the nanoframes on the localized surface plasmon resonance peak was explored by a combination of discrete dipole approximation calculations and single nanoparticle spectroscopy.With their hollow and open structures,the Au nanoframes represent a novel class of substrates for applications including surface plasmonics and surface-enhanced Raman scattering. | Leslie Au Yeechi Chen Fei Zhou Pedro H.C.Camargo Byungkwon Lim Zhi-Yuan Li David S.Ginger Younan Xia | 2008 | Nano Research2008，1，6： | 3 |
| 9 | The influence of pH and organic matter content in paddy soil on heavy metal availability and their uptake by rice plants显示文摘 | Fanrong Zeng Shafaqat Ali Haitao Zhang Younan Ouyang Boyin Qiu Feibo Wu Guoping Zhang | 2010 | Environmental Pollution2010，，1： | 3 |
| 10 | New Insights into the Growth Mechanism and Surface Structure of Palladium Nanocrystals显示文摘This paper presents a systematic study of the growth mechanism for Pd nanobars synthesized by reducing Na_(2)PdCl_(4) with L-ascorbic acid in an aqueous solution in the presence of bromide ions as a capping agent.Transmission electron microscopy(TEM)and high-resolution TEM analyses revealed that the growth at early stages of the synthesis was dominated by particle coalescence,followed by shape focusing via recrystallization and further growth via atomic addition.We also investigated the detailed surface structure of the nanobars using aberration-corrected scanning TEM and found that the exposed{100}surfaces contained several types of defects such as an adatom island,a vacancy pit,and atomic steps.Upon thermal annealing,the nanobars evolved into a more thermodynamically favored shape with enhanced truncation at the corners. | Byungkwon Lim Hirokazu Kobayashi Pedro H.G.Camargo Lawrence F.Allard Jingyue Liu Younan Xia | 2010 | Nano Research2010，3，3： | 3 |
| 11 | Research on the Structural Rigidity Characteristics of a Reconfigurable TBM Thrust Mechanism显示文摘To improve the adaptability of TBMs in diverse geological environments,this paper proposes a reconfigurable Type-V thrust mechanism(V-TM)with rearrangeable working states,in which structural stiffness can be automatically altered during operation.Therefore,millions of configurations can be obtained,and thousands of instances of working status per configuration can be set respectively.Nonetheless,the complexity of configurations and diversity of working states contributes to further complications for the structural stiffness algorithm.This results in challenges such as difficulty calculating the payload compliance index and the environment adaptability index.To solve this problem,we use the configuration matrix to describe the relationship between propelling jacks under reconfiguration and adopt pattern vectors to describe the working state of each hydraulic cylinder.Then,both the dynamic compatible equation between propeller forces of the hydraulic cylinders and driving forces,and the kinematic harmonizing equation between the hydraulic cylinder displacements and their deformations are established.Next,we derive the stiffness analytical equation using Hooke’s law and the Jacobian Matrix.The proposed approach provides an effective algorithm to support structural rigidity analysis,and lays a solid theoretical foundation for calculating the performance indexes of the V-TM.We then analyze the rigidity characteristics of typical configurations under different working states,and obtain the main factors affecting structural stiffness of the V-TM.The results show the deviation degree of structural parameters in hydraulic cylinders within the same group,and the working status of propelling jacks.Finally,our constructive conclusions contribute valuable information for matching and optimization by drawing on the factors that affect the structural rigidity of the V-TM. | Younan Xu Xinjun Liu Jiyu Xu | 2019 | Chinese Journal of Mechanical Engineering2019，32，6： | 2 |
| 12 | Prognostic Analysis of Clinicopathologic Factors in 49 Patients With Diffuse Malignant Peritoneal Mesothelioma Treated With Cytoreductive Surgery and Intraperitoneal Hyperthermic Perfusion显示文摘 | Marcello Deraco MD Daisuke Nonaka MD Dario Baratti MD Paolo Casali MD Juan Rosai MD Rami Younan MD Andreola Salvatore MD Antonello D. Cabras AD MD Shigeki Kusamura MD | 2006 | Annals of Surgical Oncology2006，，2： | 2 |
| 13 | DTM extraction of Lidar returns via adaptive processing显示文摘 | Lee H S Younan N H | 2003 | IEEE Transactions on Geoscience and Remote Sensing2003，41，9： | 1 |
| 14 | DTM extraction of LiDAR returns via adaptive processing显示文摘 | LEE H S YOUNAN N H | 2003 | IEEE Transactions on Geoscience and Remote Sensing2003，41，9： | 1 |
| 15 | Feature identification via a combined ICA-Wavelet method for image information mining显示文摘 | SHAH V P YOUNAN N H DURBHA S S | 2010 | IEEE Geoscience and Remote Sensing Letters2010，7，1： | 1 |
| 16 | Epoxidized linseed oil-free fatty acids modified with substituted anilines as antioxidants and antirads for SBR vulcanizates显示文摘 | Younan A F Al-kobtan A F Badran B M | 1993 | Journal Applied Polymer Science1993，49，15： | 1 |
| 17 | Dynamic modeling and response of soil-wall system显示文摘 | Veletsos A S Younan A H | 1994 | Journal of Geotechnical and Geoenvironmental Engineering1994，120，12： | 1 |
| 18 | Electrospinning of polymeric and ceramic nanofibers as uniaxially aligned arrays显示文摘 | DAN Li WANG Yuliang XIA Younan | 2003 | Nano Letters2003，3，8： | 1 |
| 19 | Magnetic-field- assisted electrospinning of aligned straight and wavy polymeric nanofibers 显示文摘 | Liu Yaqing Zhang Xinping Xia Younan | 2010 | Adv Mater2010，22，22： | 1 |
| 20 | Electrospinning of polymeric and ceramic nanofibers as uniaxially aligned arrays显示文摘 | LI Dan WANG Yuliang XIA Younan | 2003 | Nano Letter2003，3，8： | 1 |
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