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Search Results: 1 - 10 of 80906 matches for " Baoshun Liu "
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Optimization of Duty Ratio of Metallic Grating Arrays for Infrared Photodetectors  [PDF]
Dong Liu, Yongqi Fu, Lechen Yang, Baoshun Zhang, Haijun Li, Kai Fu, Min Xiong
Optics and Photonics Journal (OPJ) , 2011, DOI: 10.4236/opj.2011.13016
Abstract: Influence of duty ratio of metallic gratings applied in quantum well infrared photodetector (QWIP) with detection ranging from 3 μm to 5 μm was studied in this paper. The influence on longer enhanced wavelength working at infrared waveband was investigated. A relationship between the duty ratio and the enhanced peak intensity is given. Some results can be applied to optimize the enhanced efficiency of the metallic gratings.
Electrospinning Preparation and Photocatalytic Activity of Porous TiO2 Nanofibers
Shanhu Liu,Baoshun Liu,Kazuya Nakata,Tsuyoshi Ochiai,Taketoshi Murakami,Akira Fujishima
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/491927
Abstract: Porous TiO2 nanofibers were prepared via a facile electrospinning method. The carbon nanospheres were mixed with the ethanol solution containing both poly(vinylpyrrolidone) and titanium tetraisopropoxide for electrospinning; and subsequent calcination of as-spun nanofibers led to thermal decomposition of carbon nanospheres, leaving behind pores in the TiO2 nanofibers. The morphology and phase structure of the products were investigated with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Furthermore, the photocatalytic activity of porous TiO2 nanofibers was evaluated by photodecomposition of methylene blue under UV light. Results showed that the porous TiO2 nanofibers have higher surface area and enhanced photocatalysis activity, compared to nonporous TiO2 nanofibers.
Synthesis, Characterization, and Photocatalysis of Fe-Doped : A Combined Experimental and Theoretical Study
Liping Wen,Baoshun Liu,Xiujian Zhao,Kazuya Nakata,Taketoshi Murakami,Akira Fujishima
International Journal of Photoenergy , 2012, DOI: 10.1155/2012/368750
Abstract: Fe-doped TiO2 was prepared by hydrothermal treating Ti peroxide sol with different amount of iron nitrate. Fe ions can enter TiO2 lattice by substituting Ti4
Photomechanical Energy Conversion of Photoresponsive Fibers Exhibiting Bending Behavior
Kazuya Nakata,Yosuke Ishikawa,Munetoshi Sakai,Baoshun Liu,Tsuyoshi Ochiai,Hideki Sakai,Taketoshi Murakami,Masahiko Abe,Akira Fujishima
International Journal of Photoenergy , 2012, DOI: 10.1155/2012/574124
Abstract: Photoresponsive fibers based on poly(acrylamide) (PAA) with methylene blue (MB) dye were prepared. All semicircular fibers show bending towards the direction of the flat surface of the fiber when illuminated. The fibers recover their initial shape when the illumination stops. The fiber is heated upon illumination and cooled to room temperature once the illumination is stopped. The fiber also is sensitive to humidity, showing bending behavior towards the direction of the flat surface of the fiber upon changing the humidity. The mechanical energy of the PAA/MB fiber is approximately 0.6?mN for the bending direction when it is illuminated. A possible mechanism for the bending behavior is as follow: (1) the fiber is heated upon illumination because of the photothermal effect, (2) the fiber loses water molecules, (3) the fiber shrinks; bending towards the direction of the flat surface of the fiber occurs because of a difference in the shrinkage for the flat surface and the other side of the fiber. Finally, we demonstrated that a PP ball (1.5?mg) can be moved by the mechanical energy produced by the changing shape of the fiber upon illumination. 1. Introduction Utilization of solar energy is a key factor for development of a sustainable society. Among a number of approaches for solar energy conversion, photomechanical energy conversion has significant advantages such as direct energy conversion from photo to mechanical, which may potentially lead to high energy conversion efficiency, no cable for working, and space-saving. Typical photomechanical materials that change shape in response to light are liquid crystalline elastomer films based on azobenzene derivatives [1–14]. These materials show bending behavior upon illumination because the structure of azobenzene derivative molecules in the film changes from trans to cis form, which generates mechanical energy. Although these materials have attracted much attention because they can be applied as photodriven motors [9], actuators [1, 3, 4, 6, 8, 10, 11, 15–17], and new types of solar energy conversion systems [2, 5, 7, 11–14, 16, 18, 19], they need multiple synthetic procedures followed by rubbing to align the azobenzene molecules, which makes them impractical for many applications. Materials exhibiting a volume change in response to light are of interest [20–22]. For example, hydrogels that show a volume change upon the application of light have been reported previously [21–23]. The basic mechanism for the volume change is a solvent absorption/desorption process. Suzuki and Tanaka reported that a polymer gel
Preparation and Characterization of Monoclonal Antibodies to Aflatoxin B_1

Lu Ge Liu Baoshun Liu Chunxia,

生物工程学报 , 1995,
Abstract: Five hybridoma cell lines producing monoclonal antibodies (McAb) against aflatoxin B1 (AFB1) were established after fusion of mouse myecloma cells (Sp-2/0-Ag-14) with spleen cells isolated from male BALB/c mice immunized with AFB1-BSA conjugate. Among them, a McAb which was designated AFB1-2H8 was of the subtype IgG3 and the ascitic fluid of it gave suitably high dilution titres (1: 5X106). The sensitivity of a competitive enzyme- (linked immunosorbent assay (ELISA) using AFB1-2H8 for AFB1 was demonstrated that the linear range was 0. 5~50ng/ml and the minimum detectable concentration of AFB1 was 0. 01ng/ml. The specificity of the McAb was determined and it was shown no cross-rection significantly with any of the metabolites tested. So the McAb and the ELISA described may prove of use in the detection of AFB] foods and feeds.
Properties and Evolution Path of Ore Forming Fluid in Qiagong Polymetallic Deposit of Middle Gangdese in Tibet, China

李应栩 , 李光明, 谢玉玲 , 张丽 , 刘保顺, 李腊梅
Li Yingxu
, Li Guangming , Xie Yuling , Zhang Li , Liu Baoshun , Li Lamei

地球科学(中国地质大学学报) , 2018, DOI: 10.3799/dqkx.2018.170
Abstract: 目前对于中冈底斯成矿带上的矿床的研究主要在地质特征、成矿时代和成矿岩体成因方面,而对于其形成过程尤其是成矿流体演化方面的详细研究报道较少.该成矿带上的恰功多金属矿床代表了主碰撞期的成矿作用,其矿化形式包括矽卡岩型的铁(铜)、热液脉型铅锌银(铜)和碳酸盐交代型铅锌银3种.通过野外地质调查和镜下岩矿相观察,可将该矿床的形成过程划分为(Ⅰ)石榴石-磁铁矿复合阶段、(Ⅱ)绿帘石-磁铁矿阶段、(Ⅲ)石英-赤铁矿阶段、(Ⅳ)萤石-黄铜矿阶段、(Ⅴ)方解石-方铅矿-闪锌矿阶段和(Ⅵ)方解石-石英6个成矿阶段.对代表成矿各阶段的流体包裹体进行了岩相学、显微测温、显微激光拉曼、质子激发X荧光光谱分析等,结果显示成矿流体从早期到晚期温度、压力、密度和盐度不断降低,兼有渐变和突变,流体相主要成分由早期H2O-NaCl(Ⅰ-Ⅱ)经中期H2O-NaCl-FeCl2-3±MgCl2(Ⅲ)和H2O-CO2-NaCl(Ⅳ)向晚期H2O-NaCl-CaCl2(Ⅴ&Ⅵ)变化.期间铜的沉淀主要与Ⅳ阶段流体沸腾有关,铅锌的沉淀可能与Ⅴ阶段温度降低有关,也可能为叠加矿化的结果.
The current study of the deposits on the Middle Gangdese metallogenic belt is mainly related to geological features,metallogenic epochs and the origin of ore-forming rock masses.However,there are less detailed reports on the formation process,especially the evolution of ore-forming fluids.Qiagong polymetallic deposit located in the belt is genetically related to monzogranite porphyry formed at early India-Asia continental collision.The mineralization styles include skarn type Fe(-Cu),distal vein type Pb-Zn-Ag(-Cu) and carbonate replacement type Pb-Zn-Ag.Based on field observation and petrographic results the ore-forming process in this deposit can be divided into at least six stages including complexed garnet-magnetite stage (I),epidote-magnetite stage (II),quartz-hematite stage (III),fluorite-chalcopyrite stage (IV),calcite-galena-sphalerite stage (V) and calcite-quartz stage (VI).Petrographic,microthermometric and laser Raman microprobe results of fluid inclusions in quartz,garnet,epidote,calcite and fluorite from these six stages demonstrate that the pressure,temperature,density and salinity of the ore forming fluid decrease from early to later stage,and the fluid system change from early H2O-NaCl (I-II) via H2O-NaCl-FeCl2-3±MgCl2(III),H2O-CO2-NaCl (IV) to late H2O-NaCl-CaCl2(V&VI).The deposition of Cu in Qiagong was triggered by the boiling of the ore-forming fluid of H2O-CO2-NaCl system from stage IV.The deposition of Pb and Zn might be ascribed to the temperature decrease,or it might also be the result of mineralization superposition
Enhancement-mode InAlN/GaN MISHEMT with low gate leakage current
低栅漏电的增强型InAlN/GaN MISHEMT

Gu Guodong,Cai Yong,Feng Zhihong,Liu Bo,Zeng Chunhong,Yu Guohao,Dong Zhihua,Zhang Baoshun,

半导体学报 , 2012,
Abstract: 中文:本文报道了采用热氧化的技术实现低栅泄漏电的增强型InAlN/GaN MISHEMT。在VDS=5V和VGS=0V时,关态漏极电流达到了10-7A/mm。器件的阈值电压为2.2V。当VDS=5V时,漏极电流在VGS=4.5V时,达到349mA/mm,在VGS=3.4V时,最大跨导为179ms/mm。在当VGS= -15V时候,器件的反向栅泄漏电流达到4.9?10-7A/mm。
Magmatic intrusive series and their implication for the ore prospecting in Anji exploration area, Zhejiang Province

XIE YuLing,TANG YanWen,LI YingXu,LI Yuan,LIU BaoShun,QIU LiMing,ZHANG XinXin,JIANG YanCen,

岩石学报 , 2012,
Abstract: 本文在野外地质调研基础上,通过室内岩矿相鉴定和岩石化学分析,结合锆石U-Pb年代学研究结果,对安吉矿区主要侵入岩单元的岩浆侵位序列、岩浆演化、构造背景及矿化控制进行了探讨。矿区岩浆活动时限为141~117Ma,处于晚侏罗-早白垩世中国东部构造活化和构造机制转化阶段。矿区不同侵入岩单元的侵位顺序依次为黑云母二长花岗岩、正长花岗岩、花岗闪长岩、细粒花岗岩及双峰式脉岩组合,除双峰式脉岩组合外,其余岩石单元构成坞山关杂岩体。杂岩体不同岩石单元间具有一定的地球化学亲缘关系,其成分变化是先存断裂的多次张开和焊结、深源物质注入和结晶分异联合作用的结果。双峰式脉岩组合是区域岩石圈减薄高峰、深部物质快速上涌的表现,也是中国东部应力场进入引张阶段的标志。矿区主要经历了两次矿化事件。第一期与花岗闪长岩(137Ma)侵位有关,形成以石榴子石矽卡岩为特征的矽卡岩型铁铜矿化,其主要分布于矿区西部;第二期为与细粒花岗岩(134~135Ma)侵位有关的铅锌(银)、钼矿化,形成了以绿帘石矽卡岩为主的矽卡岩型铅锌(银)矿化,同时在矿区北部的石灰岩地层中形成了碳酸盐交代型铅锌矿化、在黑云母二长花岗岩中形成脉状、网脉状铅锌矿化及网脉状-浸染状辉钼矿化。主要侵入岩单元的岩石化学表明,与成矿有关的花岗闪长岩显示了I型花岗岩的地球化学特征,而细粒花岗岩的岩石化学特征界于I型与S型之间,但均表现有深源物质加入,细粒花岗岩相对于花岗闪长岩显示相对氧化条件和较强的分异特征。深源物质加入和进一步的结晶分异是造成熔体中成矿金属元素富集的重要机制。矿区内与成矿有关的花岗闪长岩和细粒花岗岩主要发育于矿区东西两侧,因此矿区西侧为铁铜勘查的有利地区,而东部的铅锌(银)钼矿化值得进一步工作,但矿区后期NE和近EW向断裂构造对矿体的保存条件影响较大,因此在勘查工作中应加强矿区构造地质方面的研究工作。
Characterization of a room temperature terahertz detector based on a GaN/AlGaN HEMT

Zhou Yu,Sun Jiandong,Sun Yunfei,Zhang Zhipeng,Lin Wenkui,Liu Hongxin,Zeng Chunhong,Lu Min,Cai Yong,Wu Dongmin,Lou Shitao,Qin Hua,Zhang Baoshun,

半导体学报 , 2011,
Abstract: 本文主要论述一种带平板天线,基于GaN/AlGaN高电子迁移率场效应晶体管的室温太赫兹探测器。太赫兹辐射下,由于天线的作用会在栅下感应出平行沟道和垂直沟道的太赫兹电场,由此在源漏产生强烈依赖于栅压的直流光电流。尽管栅极远离源漏两端,平行沟道和垂直沟道的太赫兹电场依然很强。探测器可以用自混频理论很好的描述。在室温下,探测器的响应度和噪声等效功率分别为100 nW/sqrt(Hz)和 3 mA/W。探测器具有很高的响应速度,在5 KHz的调制下,光电流没有衰减。如果缩少栅极和源漏的距离将进一步提高探测灵敏度。
Crack-Free GaN Grown by MOCVD on Si(111)

Zhang Baoshun,Wu Mo,Chen Jun,Shen Xiaoming,Feng Gan,Liu Jianping,Shi Yongsheng,Duan Lihong,Zhu Jianjun,Yang Hui,Liang Junwu,

半导体学报 , 2004,
Abstract: 采用Al N插入层技术在Si(1 1 1 )衬底上实现无微裂Ga N MOCVD生长.通过对Ga N外延层的a,c轴晶格常数的测量,得到了Ga N所受张应力与Al N插入层厚度的变化关系.当Al N厚度在7~1 3nm范围内,Ga N所受张应力最小,甚至变为压应力.因此,Ga N微裂得以消除.同时研究了Al N插入层对Ga N晶体质量的影响,结果表明,许多性能相比于没有Al N插入层的Ga N样品有明显提高
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