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Nano-Micro Letters 2015年第1期7卷 51-58页

作者： Jun Wang Jinting Jiu Teppei Araki Masaya Nogi Tohru Sugahara Shijo Nagao Hirotaka Koga Peng He Katsuaki Suganuma state key laboratory of Advanced Welding and Joining Harbin Institute of Technology The Institute of Scientific and Industrial Research Osaka University

Transparent electrode based on silver nanowires(Ag NWs) emerges as an outstanding alternative of indium tin oxide film especially for flexible electronics. However, the conductivity of Ag NWs transparent electrode is still dramatically limited by the contact resistance between nanowires at high transmittance. Polyvinylpyrrolidone(PVP) layer adsorbed on the nanowire surface acts as an electrically insulating barrier at wire–wire junctions, and some devastating post-treatment methods are proposed to reduce or eliminate PVP layer, which usually limit the application of the substrates susceptible to heat or pressure and burden the fabrication with high-cost, time-consuming, or inefficient processes. In this work, a simple and rapid pre-treatment washing method was proposed to reduce the thickness of PVP layer from 13.19 to0.96 nm and improve the contact between wires. Ag NW electrodes with sheet resistances of 15.6 and 204 X sq-1have been achieved at transmittances of 90 and 97.5 %, respectively. This method avoided any post-treatments and popularized the application of high-performance Ag NW transparent electrode on more substrates. The improved Ag NWs were successfully employed in a capacitive pressure sensor with high transparency, sensitivity, and reproducibility.

关键词： Silver nanowire Pre-treatment Transparent electrode Pressure sensor

Using trace elements of magnetite to constrain the origin of the Pingchuan hydrothermal low-Ti magnetite deposit in the Panxi area, SW China

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Acta Geochimica 2019年第3期38卷 376-390页

作者： Yanjun Wang Weiguang Zhu Hong Zhong Zhongjie Bai Junhua Yao Chong Xu state key laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

The Pingchuan iron deposit, located in the Yanyuan region of Sichuan Province, SW China, has an ore reserve of 40 Mt with ~60 wt% Fe. Its genesis is still poorly understood. The Pingchuan iron deposit has a paragenetic sequence of an early Fe-oxide–Pyrite stage(Ⅰ) and a late Fe-oxide–pyrrhotite stage(Ⅱ). Stage Ⅰ magnetite grains are generally fragmented, euhedral–subhedral, largesized crystals accompanying with slightly postdated *** Ⅱ magnetite grains are mostly unfragmented, anhedral, relatively small-sized grains that co-exist with pyrrhotite. Combined with micro-textural features and previously-obtained geochronological data, we consider that these two stages of iron mineralization in the Pingchuan deposit correspond to the Permian ELIP magmatism and Cenozoic fault activity event. Both the Stage Ⅰ and Ⅱ magnetites are characterized with overall lower contents of trace elements(including Cr, Ti, V, and Ni) than the ELIP magmatic magnetite, which suggests a hydrothermal origin for them. ‘‘Skarn-like'' enrichment in Sn, Mn, and Zn in the Stage Ⅰ magnetite grains indicate significant material contributions from carbonate wall-rocks due to water–rock interaction in ore-forming processes. Stage Ⅱ magnetite grains contain higher Mn concentrations than Stage Ⅰ magnetite grains, which possibly implies more contribution from carbonate rocks. In multiple-element diagrams, the Stage Ⅰ magnetite shows systematic similarities to Kiruna-type magnetite rather than those from other types of deposits. Combined with geological features and previous studies on oxygen isotopes, we conclude that hydrothermal fluids have played a key role in the generation of the Pingchuan low-Ti iron deposit.

关键词： SW China Pingchuan iron deposit Low-Ti iron deposit Hydrothermal magnetite

The influence of particle size and concentration combined with pH on coagulation mechanisms

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Journal of Environmental Sciences 2019年第8期31卷 39-46页

作者： Hongyan Sun Ruyuan Jiao Hui Xu Guangyu An Dongsheng Wang state key laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences key laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences

In order to evaluate the influence of particle size and particle concentration on the coagulation process, two kinds of particle suspensions, nanoparticles and microparticles,were employed to investigate the effect of particle size on coagulation mechanisms with varying coagulation parameters. Results showed that it is easier for nanoparticles to cause self-aggregation because of Brownian motion, while interception and sedimentation are the mainly physical processes affecting particle transport for microparticles, so they are more stable and disperse more easily. The particle size distribution and particle concentration had distinct influence on the coagulation mechanisms. Under neutral conditions, as the amount of coagulant increased, the coagulation mechanism for nanoparticles changed from charge neutralization to sweep flocculation and the nanoparticles became destabilized, re-stabilized and again destabilized. For microparticles, although the coagulation mechanism was the same as that of nanoparticles, the increased rate of aluminum hydroxide precipitation exceeded the adsorption of incipiently formed soluble alum species, resulting in the disappearance of the re-stabilization zone. Under acidic conditions, Brownian motion dominates for nanoparticles at low particle concentrations, while sweep flocculation is predominant at high particle concentrations. As for microparticles, charge neutralization and sweep flocculation are the mechanisms for low and high particle concentrations *** alkaline condition, although the mechanisms for both nano-and microparticles are the same, the morphology of flocs and the kinetics of floc formation are different. At low particle concentrations, nanoparticles have larger growth rate and final size of flocs, while at high particle concentrations, nanoparticles have higher fractal dimension and recovery factors.

关键词： Nanoparticles Microparticles Particle size distribution Coagulation mechanisms Alum

Multi-scale variability of the tropical Indian Ocean circulation system revealed by recent observations

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Science China Earth Sciences 2018年第6期61卷 668-680页

作者： Ke HUANG Dongxiao WANG Weiqiang WANG Qiang XIE Ju CHEN Lingfang CHEN Gengxin CHEN state key laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Institute of Deep Sea Science and Engineering Chinese Academy of Sciences Sanya 572000 China laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 China state key laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

The tropical Indian Ocean circulation system includes the equatorial and near-equatorial circulations, the marginal sea circulation, and eddies. The dynamic processes of these circulation systems show significant multi-scale variability associated with the Indian Monsoon and the Indian Ocean dipole. This paper summarizes the research progress over recent years on the tropical Indian Ocean circulation system based on the large-scale hydrological observations and numerical simulations by the South China Sea Institute of Oceanology(SCSIO), Chinese Academy of Sciences. Results show that:(1) the wind-driven Kelvin and Rossby waves and eastern boundary-reflected Rossby waves regulate the formation and evolution of the Equatorial Undercurrent and the Equatorial Intermediate Current;(2) the equatorial wind-driven dynamics are the main factor controlling the inter-annual variability of the thermocline in the eastern Indian Ocean upwelling;(3) the equatorial waves transport large amounts of energy into the Bay of Bengal in forms of coastal Kelvin and reflected free Rossby waves. Several unresolved issues within the tropical Indian Ocean are discussed:(i) the potential effects of the momentum balance and the basin resonance on the variability of the equatorial circulation system, and(ii) the potential contribution of wind-driven dynamics to the life cycle of the eastern Indian Ocean upwelling. This paper also briefly introduces the international Indian Ocean investigation project of the SCSIO, which will advance the study of the multi-scale variability of the tropical Indian Ocean circulation system, and provide a theoretical and data basis to support marine environmental security for the countries around the Maritime Silk Road.

关键词：热带印度洋发行量可变性多尺度系统赤道附近印度洋偶极子海洋资源

RIN enhances plant disease resistance via root exudate-mediated assembly of diseasesuppressive rhizosphere microbiota

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Molecular Plant 2023年第9期16卷 1379-1395页

作者： Keming Yang Ruixin Fu Haichao Feng Gaofei Jiang Omri Finkel Tianyu Sun Mingchun Liu Baowen Huang Shan Li Xiaofang Wang Tianjie Yang Yikui Wang Shimei Wang Yangchun Xu Qirong Shen Ville-Petri Friman Alexandre Jousset Zhong Wei key Lab of Organic-based Fertilizers of China Jiangsu Provincial Key Lab of Solid Organic Waste UtilizationJiangsu Collaborative Innovation Center of Solid Organic WastesEducational Ministry Engineering Center of Resource-saving fertilizersNanjing Agricultural UniversityNanjingJiangsu 210095China College of Agro-grassland Science Nanjing Agricultural UniversityNanjingJiangsu 210095China School of Biology and Food Shangqiu Normal UniversityShangqiu 476000China College of Agriculture Henan UniversityZhengzhou 450046China Department of Plant and Environmental Sciences Institute of Life ScienceThe Hebrew University of JerusalemJerusalemIsrael key laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesState Key Laboratory of Hydraulics and Mountain River EngineeringSichuan UniversityChengdu 610064China key laboratory of Plant Hormones and Development Regulation of Chongqing School of Life SciencesChongqing UniversityChongqingChina key laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China Institute of Vegetable Research Guangxi Academy of Agricultural SciencesNanningChina Department of Biology University of YorkYork YO105DDUK Department of Microbiology University of Helsinki00014 HelsinkiFinland

The RIPENING-INHIBITOR(RIN)transcriptional factor is a key regulator governing fruit *** RIN also affects other physiological processes,its potential roles in triggering interactions with the rhizosphere microbiome and plant health are *** we show that RIN affects microbiome-mediated disease resistance via root exudation,leading to recruitment of microbiota that suppress the soil-borne,phytopathogenic Ralstonia solanacearum *** with the wild-type(WT)plant,RIN mutants had different root exudate profiles,which were associated with distinct changes in microbiome composition and ***,the relative abundances of antibiosis-associated genes and pathogensuppressing Actinobacteria(Streptomyces)were clearly lower in the rhizosphere of rin *** composition,diversity,and suppressiveness of rin plant microbiomes could be restored by the application of 3-hydroxyflavone and riboflavin,which were exuded in much lower concentrations by the rin ***,RIN-mediated effects on root exudates,Actinobacteria,and disease suppression were evident from the seedling stage,indicating that RIN plays a dual role in the early assembly of diseasesuppressive microbiota and late fruit ***,our work suggests that,while plant disease resistance is a complex trait driven by interactions between the plant,rhizosphere microbiome,and the pathogen,it can be indirectly manipulated using"prebiotic"compounds that promote the recruitment of disease-suppressive microbiota.

关键词： rhizosphere microbiome plant-microbe interactions disease-suppressive microbiota rhizosphere immunity bacterial wilt tomato root exudates

LA-ICP-MS U-Pb zircon dating of the Bozhushan granite in Southeast Yunnan

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Chinese Journal Of Geochemistry 2013年第2期32卷 170-180页

作者： LI Kaiwen ZHANG Qian WANG Dapeng CAI Yi LIU Yuping state key laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

The LA-ICP-MS U-Pb zircon dating of eight typical samples from four units of the Bozhushan granite intrusion in southeastern Yunnan Province, constrains the age of acidic magmatic intrusion in this area. Both the oscillatory zoning and chondrite-normalized REE patterns characterized by LREE-depletion and HREE-enrichment with positive Ce anomaly and negative Eu anomaly indicate the magmatic genesis of these zircons. Eight zircon samples from the Bozhushan granite yielded a mean 206 Pb/ 238 U age of (85.58±1.0) Ma (MSWD=4.1) to (88.10±0.66) Ma (MSWD=1.8). These chronology data suggest an accurate isotopic age for the intrusion of the Bozhushan granite, and are different from the published age data of 48 to 111.5 Ma. The geochronology data of the Gejiu, Dulong and Dachang super-large deposits and related Yanshanian granites indicated that there occurred large-scale granitic magmatism and mineralization events in western Nanling region during the Late Cretaceous.

关键词： U-Pb同位素定年 LA-ICP-MS 燕山期花岗岩锆石滇东南同位素年龄典型样本稀土富集

Role of flood discharge in shaping stream geometry:Analysis of a small modern stream in the Uinta Basin,USA

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Journal of Palaeogeography 2017年第1期6卷 84-95页

作者： Guang-Ming Hu Ru-Xin Ding Yan-Bing Li Jing-Fu Shan Xiao-Tao Yu Wei Feng School of Geosciences Yangtze UniversityWuhan 430100HubeiChina state key laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China School of Earth Science and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275GuangdongChina Guangdong Provincial key laboratory of Mineral Resources and Geological processes Guangzhou 510275GuangdongChina The Third Production Plant Daqing Oilfield BranchPetroChinaDaqing 163000HeilongjiangChina

This small modern river system is located on a retativety flat （about 1°-2°）, unconsotidated sandy pediment surface in the Uinta Basin of Utah, USA, and it is with a scare of about 30 m tong and 0.4-0.8 m wide, simitar as a natural flume experiment modet. The smart stream is informatty divided into upstream, midstream and downstream. The anatysis shows that flood discharge influences channet sinuosity and morphology to produce an initiat meandering pattern which is tater changed to a braided and then a straisht pattern in the downflow direction. The upstream segment has a hish sinuous geometry dominated by both erosion （cutbanks） and deposition （point bars）. In the resistance of sporadic vegetation rooting in banks, the upstream flood deviates its original direction, which resutts in the powerful flood intensively eroding the cutbank and accreting clastics to build point bars, and thus producing a high sinuous channet. The midstream is dominated by deposits （many smart bars） with a moderate to tow sinuosity. Due to the bad drainage of the high sinuous channel in the upstream, the strong flood can cut off the point bar comptetely or even surmount the tevee in the fast meandering upstream, which widens the channel suddenty with a quick decreasing current power. Then, the ctastics from the upstream are untoaded in the midstream and form many smart bars. Untoaded sediments protect the bank, and the tow-power current brings a moderate erosion to the bank, which forms a moderate to tow sinuous channel in the midstream. The downstream shows multistage erosionat terraces in its retativety straight channets. After the midstream water drops its toad, it becomes ＂dear＂ and reaches downstream, the tower current power is hetptess to reform channet 8eometry. Thus, the downstream channel sesment keeps a tower sinuous geometry, evenstraight partially. Small amounts of fine clastics are deposited, and simultaneously multistage terraces are formed due to regressive flood erosion.

关键词： Sinuosity Braiding Point bar Channel bar Flood discharge Uinta Basin

One-step synthesis of novel snowflake-like Si-O/Si-C nanostructures on 3D graphene/Cu foam by chemical vapor deposition

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Nano Research 2018年第4期11卷 1861-1872页

作者： Jing Ning Dong Wang Jincheng Zhang Xin Feng Ruixia Zhong Jiabo Chen Jianguo Dong Lixin Guo Yue Hao The state key Discipline laboratory of Wide Band Gap Semiconductor Technology Xidian University Xi'an 710071 China ShaanxiJoint key laboratory of Graphene Xidian University Xi'an 710071 China School of Physics and Optoelectronic Engineering Xidian University Xi'an 710071 China

The recent development of synthesis processes for three-dimensional （3D） graphene-based structures has tended to focus on continuous improvement of porous nanostructures, doping modification during thin-film fabrication, and mechanisms for building 3D architectures. Here, we synthesized novel snowflake- like Si-O/Si-C nanostructures on 3D graphene/Cu foam by one-step low-pressure chemical vapor deposition （CVD）. Through systematic micromorphological characterization, it was determined that the formation mechanism of the nanostructures involved the melting of the Cu foam surface and the subsequent condensation of the resulting vapor, 3D growth of graphene through catalysis in the presence of Cu, and finally , nudeation of the Si-O/Si-C nanostructure in the carbon-rich atmosphere. Thus, by tuning the growth temperature and duration, it should be possible to control the nucleation and evolution of such snowflake-like nanostructures with precision. Electrochemical measurements indicated that the snowflake-like nanostructures showed excellent performance as a material for energy storage. The highest specific capacitance of the Si-O/Si-C nanostructures was - 963.2 mF/cm2 at a scan rate of 1 mV/s. Further, even after 20,000 sequential cycles, the electrode retained 94.4% of its capacitance.

关键词： snowflake-like nanostructures graphene chemical vapor deposition (CVD)

Clathrate Hydrate Capture of CO2 from Simulated Flue Gas with Cyclopentane/Water Emulsion

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Chinese Journal of Chemical Engineering 2010年第2期18卷 202-206页

作者：李士凤樊栓狮王金渠郎雪梅王燕鸿 state key laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian 116012 China key laboratory of Enhanced Heat Transfer and Energy Conversation Ministry of Education South China University of Technology Guangzhou 510640 China

Capture of CO2 by hydrate is one of the attractive technologies for reducing greenhouse *** primary challenges are the large energy consumption,low hydrate formation rate and separation *** work presents a new method for capture of CO2 from simulated flue gasCO2(16.60%,by mole) /N2 binary mixture by formation of cyclopentane(CP) hydrates at initial temperature of 8.1°C with the feed pressures from 2.49 to 3.95 *** effect of cyclopentane and cyclopentane/water emulsion on the hydrate formation rate and CO2 separation efficiency was studied in a 1000 ml stirred *** results showed the hydrate formation rate could be increased remarkably with cyclopentane/water ***2 could be enriched to 43.97%(by mole) and 35.29%(by mole) from simulated flue gas with cyclopentane and cyclopentane/water(O/W) emulsion,respectively,by one stage hydrate separation under low feed ***2 separation factor with cyclopentane was 6.18,higher than that with cyclopentane/water emulsion(4.01) ,in the range of the feed *** results demonstrated that cyclopentane/water emulsion is a good additive for efficient hydrate capture of CO2.

关键词：笼形水合物二氧化碳环戊烷水乳液捕获模拟分离系数烟气

Hybrid ZnO@Au Nanorod Array for Fast and Repeatable Bacteria Inactivation

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Chinese Journal of Chemistry 2023年第17期41卷 2132-2142页

作者： Yu Liu Xiaoyu Zhao Xiaosa Zhang Xiaodan Jia Lie Wu Xiue Jiang College of Science Shenyang University of Chemical TechnologyShenyangLiaoning 110142China Shenyang National laboratoryfor Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyangLiaoning 110016China state key laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of Scienc ChangchunJilin 130022China

Comprehensive Summary,The worldwide abuse of antibiotics and resultant antimicrobial resistance made the development of new antibacterial materials an urgent and significant ***,a hybrid ZnO@Au nanorod array with fast bacterial inactivation and excellent recyclability was reported.93%bacteria could be inactivated within 5 min ultra-sonication under indoor daylight,and the killing rate maintains above 90%after seven repeated using *** mechanism involves extracellular reactive oxygen species(ROS)generated from photocatalysis and piezoelectricity of nanorod array,intracellular ROS generation and decrease of adenosine-triphosphate(ATP)originated from electron transfer(ET)from bacteria to nanorod array,as well as mechanical effect from the nanorod,among which ET mechanism plays a major *** Schottky barrier from the hybrid interface not only enhances the ROS generation by promoting the charge transfer and carrier separation as well as light utilization,but also enables one-direction electron transfer from bacteria to nanorod *** resultant continuous electron loss breaks the energy metabolism and disturbs the redox equilibrium,leading to bacterial *** study demonstrates the great potential of hybrid structure in antibacterial applications and indicates ET as a novel effective antibacterial mechanism for semiconductor materials,which provides insights into the design of next-generation antibacterial materials.

关键词： Antibacterial Hybrid structure Zinc oxide nanorod Electron transfer Reactive oxygen species Microarrays Nanocomposites Semiconductors