检索结果-南通市图书馆

A Study on The Optical Properties of InAs Microcrystallites Embedded in SiO2 Glass Matrix

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A Study on The Optical Properties of InAs Microcrystallites ...

Effect of Al_(2)O_(3)on the Mechanical Properties of(B_(4)C+Al_(2)O_(3))/Al Neutron Absorbing Materials

1996年中国青年学者物理学讨论会

作者： j.z.shi l.d.zhang(Institute of Solid State Physics,Academia Sinica,Hefei 230031,P.R.China)

＜正＞Optical absorption spectra of InAs mierocrystaUites exhibit a multi-peak structure and a very large blue shift of more than 2eV with respect to bulk material.A exlanation for this phenomenon was *** dependence o...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English letters) 2024年第8期37卷 1411-1420页

作者： j.X.Cai B.M.shi N.li Y.liu z.G.zhang Y.N.zan Q.z.Wang B.l.Xiao z.Y.Ma shi‑Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nuclear Equipment division Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China department of Materials Science School of Mechanical EngineeringShenyang UniversityShenyang 110044China

B_(4)C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear *** order to improve the high-temperature mechanical properties of B_(4)C/Al composites,in-situ nano-Al_(2)O_(3)was introduced utilizing oxide on Al powder *** this study,the Al_(2)O_(3)content was adjusted by utilizing spheroid Al powder with varying diameters,thereby investigating the impact of Al_(2)O_(3)content on the tensile properties of(B_(4)C+Al_(2)O_(3))/Al *** was found that the pinning effect of Al_(2)O_(3)on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high *** the result,with the increase in Al_(2)O_(3)content and the decrease in grain size,the high-temperature strength of the composites increased *** finest Al powder used in this investigation had a diameter of 1.4μm,whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 133 MPa at 350℃,surpassing that of traditional B_(4)C/Al composites.

关键词： Al matrix composites Neutron absorbing materials (B_(4)C+Al_(2)O_(3))/Al composites High-temperature strength

Four late-type Galaxies with double Radio lobes and Properties of Such Galaxies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第4期24卷 84-90页

作者： z.S.Yuan X.Y.Gao z.l.Wen j.l.Han National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China CAS Key laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100049China

The triggering mechanism for radio lobes from late-type galaxies is not fully *** samples are desired for a thorough investigation and *** utilizing the optical data from the newly released dark Energy Spectroscopic Instrument imaging surveys and the radio sources from the NRAO VlA Sky Survey and the Faint Images of the Radio Sky at Twenty-centimeter,we identify four late-type Galaxies with double Radio lobes(la GRls):j0217-3645,j0947+6220,j1412+3723 and j1736+*** previously known la GRls,we confirm the correlation between radio power P_(1.4GHz)and stellar mass M_(*)of host ***(25/35)la GRls belong to the blue cloud galaxies,while the newly identified cases in this work are located within the region of the red *** find a clear correlation between the differential radio power,i.e.,the offset from the P_(1.4GHz)-M_(*)relation,and the galaxy color,indicating that bluer galaxies at a fixed M_(*)tend to host more powerful radio ***,the majority(31/36)of la GRls are either located in a galaxy group or displaying a disturbed *** suggest that all of the galaxy mass,color and surrounding environment could play important roles in triggering radio lobes in late-type galaxies.

关键词： galaxies:active galaxies:jets galaxies:spiral radio continuum:galaxies

Greatly enhanced corrosion/wear resistances of epoxy coating for Mg alloy through a synergistic effect between functionalized graphene and insulated blocking layer

在线全文

学校读者我要写书评

暂无评论

journal of Magnesium and Alloys 2024年第1期12卷 332-344页

作者： z.Y.Xue X.j.li j.H.Chu M.M.li d.N.zou l.B.Tong School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key laboratory of Advanced design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

The poor corrosion and wear resistances of Mg alloys seriously limit their potential applications in various *** conventional epoxy coating easily forms many intrinsic defects during the solidification process,which cannot provide sufficient *** the current study,we design a double-layer epoxy composite coating on Mg alloy with enhanced anti-corrosion/wear properties,via the spin-assisted assembly *** outer layer is functionalized graphene(FG)in waterborne epoxy resin(WEP)and the inner layer is Ce-based conversion(Ce)*** FG sheets can be homogeneously dispersed within the epoxy matrix to fill the intrinsic defects and improve the barrier *** Ce film connects the outer layer with the substrate,showing the transition *** corrosion rate of Ce/WEP/FG composite coating is 2131 times lower than that of bare Mg alloy,and the wear rate is decreased by~90%.The improved corrosion resistance is attributed to the labyrinth effect(hindering the penetration of corrosive medium)and the obstruction of galvanic coupling *** synergistic effect derived from the FG sheet and blocking layer exhibits great potential in realizing the improvement of multi-functional integration,which will open up a new avenue for the development of novel composite protection coatings of Mg alloys.

关键词： Mg alloy Functionalized graphene Epoxy coating Corrosion/wear resistance Blocking layer

Construction of 2d/2d Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocatalytic hydrogen production

在线全文

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.Y.Huang z.Yang S.Y.Yang z.H.dai Y.j.liu j.H.liao G.Y.zhong z.j.Xie Y.P.Fang S.S.zhang Key laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2d)CdS nanosheets on 2d MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2d/2d structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution

STCF conceptual design report (Volume 1): Physics & detector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai l.P.An R.Aliberti Q.An X.z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov d.Bodrov A.Bogomyagkov A.Bondar I.Boyko z.H.Bu F.M.Cai H.Cai j.j.Cao Q.H.Cao X.Cao z.Cao Q.Chang K.T.Chao d.Y.Chen H.Chen H.X.Chen j.F.Chen K.Chen l.l.Chen P.Chen S.l.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng j.Cheng S.Cheng T.G.Cheng j.P.dai l.Y.dai X.C.dai d.dedovich A.denig I.denisenko j.M.dias d.z.ding l.Y.dong W.H.dong V.druzhinin d.S.du Y.j.du z.G.du l.M.duan d.Epifanov Y.l.Fan S.S.Fang z.j.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng j.l.Fu j.Gao Y.N.Gao P.S.Ge C.Q.Geng l.S.Geng A.Gilman l.Gong T.Gong B.Gou W.Gradl j.l.Gu A.Guevara l.C.Gui A.Q.Guo F.K.Guo j.C.Guo j.Guo Y.P.Guo z.H.Guo A.Guskov K.l.Han l.Han M.Han X.Q.Hao j.B.He S.Q.He X.G.He Y.l.He z.B.He z.X.Heng B.l.Hou T.j.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.j.Hu W.H.Hu X.H.Hu Y.C.Hu j.Hua G.S.Huang j.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.j.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.ji j.j.jia S.jia z.K.jia H.B.jiang j.jiang S.z.jiang j.B.jiao z.jiao H.j.jing X.l.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.lei E.levichev C.H.li C.li d.Y.li F.li G.li G.li H.B.li H.li H.N.li H.j.li H.l.li j.M.li j.li l.li l.li l.Y.li N.li P.R.li R.H.li S.li T.li W.j.li X.li X.H.li X.Q.li X.H.li Y.li Y.Y.li z.j.li H.liang j.H.liang Y.T.liang G.R.liao l.z.liao Y.liao C.X.lin d.X.lin X.S.lin B.j.liu C.W.liu d.liu F.liu G.M.liu H.B.liu j.liu j.j.liu j.B.liu K.liu K.Y.liu K.liu l.liu Q.liu S.B.liu T.liu X.liu Y.W.liu Y.liu Y.l.liu z.Q.liu z.Y.liu z.W.liu I.logashenko Y.long C.G.lu j.X.lu N.lu Q.F.lü Y.lu Y.lu z.lu P.lukin F.j.luo T.luo X.F.luo Y.H.luo H.j.lyu X.R.lyu j.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde d.Matvienko z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.l.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng l.Peng X.Y.Peng X.j.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao j.j.Qin j.j.Qin l.Q.Qin X.S.Qin T.l.Qiu j.Rademacker C.F.Redmer H.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS Key laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central South University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de lausanne(EPFl) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in China is under development with an extensive R&d *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&d and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

Understanding the initial use stage of cement mortar lining in drinking water distribution systems:Silicon and aluminum as stability indicators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2024年第1期135卷 495-505页

作者： Qiaozhi liu Yuan zhuang Guiwei li Yao zhang Marc A.Edwards Baoyou shi Key laboratory of drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Civil and Environmental Engineering Virginia TechBlacksburgVA 24061USA

The cement mortar lining(CMl)of commonly used ductile iron pipes can severely deteriorate the drinking water quality at the initial stage of use,but the behavioral characteristics of different elements release from the CMl in this stage is still *** this study,dynamic immersion experiments with new cement mortar lined ductile iron pipe reactors were conducted under different feed water hardness and alkalinity *** results showed that the release of alkaline substances from the CMl at the initial stage of use could strongly influence the pH of water,which consequently greatly impacted the release/precipitation behaviors of calcium,aluminum and *** pH and aluminum concentration of the effluent water could reach 11.5 and 700μg/l within 24 hr of hydraulic retention time,respectively,under conditions of relatively lower hardness and *** to the pH elevation,calcium carbonate precipitation could occur even at much lower feed water *** the aluminum and silicon could keep release from the CMl in soluble form at different hardness and alkalinity levels,and their release rate depended on the amount of calcium carbonate ***,aluminum and silicon were more suitable as indicators of the corrosion intensity at the initial stage of CMl use rather than the traditional calcium carbonate precipitation *** feed water hardness and alkalinity levels for mitigating the initial intense corrosion of CMl were proposed:hardness>40 mg/l(CaCO_(3)),alkalinity>100 mg/l(CaCO_(3)).

关键词： Cement mortar lining Hardness Alkalinity Elemental release drinking water supply

High Colloidal Stable Carbon dots Armored liquid Metal Nano-droplets for Versatile 3d/4d Printing Through digital light Processing(dlP)

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第3期7卷 432-438页

作者： linan Wang junle zhang Xi zhang Ge shi Yanjie He zhe Cui Xiaomeng zhang Peng Fu Minying liu Xiaoguang Qiao Xinchang Pang Henan joint International Research laboratory of living Polymerizations and Functional Nanomaterials Henan Key Laboratory of Advanced Nylon Materials and ApplicationSchool of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China College of Materials Engineering Henan International Joint Laboratory of Rare Earth Composite MaterialsHenan Engineering Technology Research Center for Fiber Preparation and ModificationHenan University of EngineeringZhengzhou 451191China

liquid metal(lM)and liquid metal alloys(lMs)possess unique physicochemical features,which have become emerging and functionalized materials that are attractive applicants in various ***,uniform lM nanodroplets armored by carbon dots(lMd@Cds)were prepared and exhibited high colloidal stability in various solvents,as well as *** optimization,lMd@Cds can be applied as functional additives for the 3d/4d printing of hydrogel and cross-linked resin through digital light processing(dlP).The light absorption of lMd@Cds not only improved the printing accuracy,but also led to the cross-linking density differential during the post-curing *** on the cross-linking density differential of soft hydrogel and photothermal performance of the lM,the 3d printed objects can exhibit stimulus responses to both water and laser ***,the Cds shell and lM core of lMd@Cds provide the printed objects interesting photoluminescence and electric conductivity capabilities,*** deduce this versatile 3d/4d printing system would provide a new platform for the preparation of multi-functional and stimuli-responsive advance materials.

关键词： 4d printing carbon dots liquid metal nanodroplets

Quasi-two dimensional Ruddlesden−Popper halide perovskites for laser applications

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第2期19卷 53-71页

作者： Kun Chen Qianpeng zhang Yin liang jiepeng Song Chun li shi Chen Fang li Qing zhang School of Mechanical and Electrical Engineering Wuhan Institute of TechnologyWuhan 430205China School of Materials Science and Engineering Peking UniversityBeijing 100871China Institute of Applied Physics and Materials Engineering Macao UniversityMacao 999078China

Quasi-two-dimensional(2d)Ruddlesden‒Popper(RP)halide perovskites,as a kind of emerged two-dimensional layered materials,have recently achieved great attentions in lasing materials field owing to their large exciton binding energy,high emission yield,large optical gain,and wide-range tuning of optical *** review will introduce research progresses of RP halide perovskites for lasing applications in aspects of materials,photophysics,and devices with emphasis on emission and lasing properties tailored by the molecular composition and *** materials,structures and fabrications are introduced in the first ***,the optical transitions and amplified spontaneous emission properties are discussed from the aspects of electronic structure,exciton,gain dynamics,and interface ***,the research progresses on lasing devices are summarized and several types of lasers including VCSEl,dFB lasers,microlasers,random lasers,plasmonic lasers,and polariton lasers are *** last,the challenges and perspectives would be provided.

关键词： two-dimensional materials metal halide perovskite Ruddlesden−Popper halide perovskites lasing emission