检索结果-南通市图书馆

国际纺织导报 2021年第2期49卷 24-26,28页

作者： S.Schlager t.maier S.Jary S.Rahbaran S.Kulka 王宏球(译) 于俊荣(校) 兰精集团(奥地利) 不详

研究展示了含有Lenzing Lyocell短切纤维的湿法成网水刺湿巾的性能,该短切纤维既能满足高性能非织造布的要求,又能实现湿巾的快速分解或分散。

关键词： Lyocell短切纤维非织造布湿强分解性能

Single-emitter super-resolved imaging of radiative decay rate enhancement in dielectric gap nanoantennas

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第1期13卷 47-54页

作者： R.Margoth Córdova-Castro Bart van Dam Alberto Lauri Stefan A.maier Riccardo Sapienza Yannick De Wilde Ignacio Izeddin Valentina Krachmalnicoff Institut Langevin ESPCI ParisPSL UniversityCNRSParisFrance the Blackett Laboratory Department of PhysicsImperial College LondonLondonUK School of Physics and Astronomy Monash UniversityClaytonVictoriaAustralia Chair in Hybrid Nanosystems Ludwig-Maximilians Universität MünchenMuenchenGermany Department of Physics University of OttawaOttawaONCanada

High refractive index dielectric nanoantennas strongly modify the decay rate via the Purcell effect through the design of radiative *** to their dielectric nature,the field is mainly confined inside the nanostructure and in the gap,which is hard to probe with scanning probe *** we use single-molecule fluorescence lifetime imaging microscopy(smFLIM)to map the decay rate enhancement in dielectric GaP nanoantenna dimers with a median localization precision of 14 *** measure,in the gap of the nanoantenna,decay rates that are almost 30 times larger than on a glass *** comparing experimental results with numerical simulations we show that this large enhancement is essentially radiative,contrary to the case of plasmonic nanoantennas,and therefore has great potential for applications such as quantum optics and biosensing.

关键词： dielectric decay radiative

Formation of transgressive anorthosite seams in the Bushveld Complex via tectonically induced mobilisation of plagioclase-rich crystal mushes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2016年第6期7卷 875-889页

作者： Wolfgang D.maier Bartosz t.Karykowski Sheng-Hong Yang School of Earth and Ocean Sciences Cardiff UniversityUK Oulu Mining School University of OuluFinland

the formation of anorthosites in layered intrusions has remained one of petrology＇s most enduring enigmas. We have studied a sequence of layered chromitite, pyroxenite, norite and anorthosite overlying the UG2 chromitite in the Upper Critical Zone of the eastern Bushveld Complex at the Smokey Hills platinum mine. Layers show very strong medium to large scale lateral continuity, but abundant small scale irregularities and transgressive relationships. Particularly notable are irregular masses and seams of anorthosite that have intrusive relationships to their host rocks. An anorthosite layer locally transgresses several 10 s of metres into its footwall, forming what is referred to as a ＂pothole＂ in the Bushveld Complex. It is proposed that the anorthosites formed from plagioclase-rich crystal mushes that originally accumulated at or near the top of the cumulate pile. the slurries were mobilised during tectonism induced by chamber subsidence, a model that bears some similarity to that generally proposed for oceanic mass flows. the anorthosite slurries locally collapsed into pull-apart structures and injected their host rocks. the final step was down-dip drainage of Fe-rich intercumulus liquid, leaving behind anorthosite adcumulates.

关键词： Anorthosite Layered intrusion Bushveld Complex South Africa Chromitite

Electrochemically driven conversion reaction in fluoride electrodes for energy storage devices

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2018年第1期4卷 462-476页

作者： Chilin Li Keyi Chen Xuejun Zhou Joachim maier State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050China University of Chinese Academy of Sciences Beijing 100039China Max Planck Institute for Solid State Research Heisenbergstraße 1D-70569 StuttgartGermany

Exploring electrochemically driven conversion reactions for the development of novel energy storage materials is an important topic as they can deliver higher energy densities than current Li-ion battery ***-type fluorides promise particularly high energy densities by involving the light and small fluoride anion,and bond breaking can occur at relatively low Li activity(i.e.,high cell voltage).Cells based on such electrodes may become competitors to other envisaged alternatives such as Lisulfur or Li-air systems with their many unsolved thermodynamic and kinetic *** conversion reactions are typically multiphase redox reactions characterized by nucleation and growth processes along with pronounced interfacial and mass transport *** significant overpotentials and nonequilibrium reaction pathways are *** this review,we summarize recent findings in terms of phase evolution phenomena and mechanistic features of(oxy)fluorides at different redox stages during the conversion process,enabled by advanced characterization technologies and simulation *** can be concluded that well-designed nanostructured architectures are helpful in mitigating kinetic problems such as the usually pronounced voltage *** this context,doping and open-framework strategies are *** these tools,simple materials that are unable to allow for substantial Li nonstoichiometry(e.g.,by Li-insertable channels)may be turned into electroactive materials.

关键词： fluoride energy breaking

Microstructural morphology and visual acuity outcome in eyes with epiretinal membrane before,during,and after membrane peeling in intraoperative optical coherence tomography assisted macular surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2023年第5期16卷 748-754页

作者： Melanie Weschta Moritz Pettenkofer Julian EKlaas Nikolaus Feucht Chris PLohmann Mathias maier Department of Ophthalmology Klinikum rechts der IsarTechnische Universität MünchenIsmaninger Str.22Munich 81675Germany Jules Stein Eye Institute University of California Los Angeles100 Stein Plaza DrivewayLos AngelesCalifornia 90095USA Department of Ophthalmology Ludwig-Maximilians-Universität MünchenMathildenstr.8Munich 80336Germany Smile Eyes Augenklinik Munich Airport Terminalstraße Mitte 18Munich 85356Germany

AIM:to measure the difference of intraoperative central macular thickness(CMt)before,during,and after membrane peeling and investigate the influence of intraoperative macular stretching on postoperative best corrected visual acuity(BCVA)outcome and postoperative CMt ***:A total of 59 eyes of 59 patients who underwent vitreoretinal surgery for epiretinal membrane was *** with intraoperative optical coherence tomography(OCt)were *** of intraoperative CMt before,during,and after peeling was ***-and postoperatively obtained BCVA and spectral-domain OCt images were ***:Mean age of the patients was 70±8.13y(range 46-86y).Mean baseline BCVA was 0.49±0.27 log MAR(range 0.1-1.3).three and six months postoperatively the mean BCVA was 0.36±0.25(P=0.01 vs baseline)and 0.38±0.35(P=0.08 vs baseline)log MAR *** stretch of the macula during surgery was 29%from baseline(range 2%-159%).Intraoperative findings of macular stretching did not correlate with visual acuity outcome within 6mo after surgery(r=-0.06,P=0.72).However,extent of macular stretching during surgery significantly correlated with less reduction of CMt at the fovea centralis(r=-0.43,Ptemporal from the fovea(r=-0.37,P=0.02 and r=-0.50,Ptively)3mo ***:the extent of retinal stretching during membrane peeling may predict the development of postoperative central retinal thickness,though there is no correlation with visual acuity development within the first 6mo postoperatively.

关键词： retinal imaging treatment surgery intraoperative optical coherence tomography epiretinal membrane

Characterization of the tribologically relevant cover layers formed on copper in oxygen and oxygen-free conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2023年第8期11卷 1505-1521页

作者： Selina RAUMEL Khemais BARIENtI Hoang-thien LUU Nina MERKERt Folke DENCKER Florian NÜRNBERGER Hans Jürgen maier Marc Christopher WURZ Institute of Micro Production technology Leibniz Universität HannoverGarbsen 30823Germany Institut für Werkstoffkunde(Materials Science) Leibniz Universität HannoverGarbsen 30823Germany Institute of Applied Mechanics Clausthal University of TechnologyClausthal-Zellerfeld 38678Germany

Engineering in vacuum or under a protective atmosphere permits the production of materials, wherever the absence of oxygen is an essential demand for a successful processing. However, very few studies have provided quantitative evidence of the effect of oxidized surfaces to tribological properties. In the current study on 99.99% pure copper, it is revealed that tribo-oxidation and the resulting increased abrasive wear can be suppressed by processing in an extreme high vacuum (XHV) adequate environment. the XHV adequate atmosphere was realized by using a silane-doped shielding gas (1.5 vol% SiH4 in argon). to analyse the influence of the ambient atmosphere on the tribological and mechanical properties, a ball–disk tribometer and a nanoindenter were used in air, argon, and silane-doped argon atmosphere for temperatures up to 800 ℃. Resistance measurements of the resulting coatings were carried out. to characterize the microstructures and the chemical compositions of the samples, the scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were used. the investigations have revealed a formation of η-Cu3Si in silane-doped atmosphere at 300 ℃, as well as various intermediate stages of copper silicides. At temperatures above 300 ℃, the formation of γ-Cu5Si were detected. the formation was linked to an increase in hardness from 1.95 to 5.44 GPa, while the Young’s modulus increased by 46% to 178 GPa, with the significant reduction of the wear volume by a factor of 4.5 and the suppression of further oxidation and susceptibility of chemical wear. In addition, the relevant diffusion processes were identified using molecular dynamics (MD) simulations.

关键词： wear behavior tribochemical reaction oxidation behavior surface analysis molecular dynamics(MD)simulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

纳米光子学中的光学涡旋

中国光学 2021年第4期14卷 792-811页

作者：李晨昊 maier Stefan A 任浩然 Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwigMaximilians-Universität MünchenMünchen80539Germany Department of Physics Imperial College LondonLondon SW72AZUnited Kingdom MQ Photonics Research Centre Department of Physics and AstronomyMacquarie UniversityAustralia

在过去的二十年中,携带轨道角动量的涡旋光引起了研究人员的广泛兴趣。涡旋光不仅在光与物质相互作用中扮演着重要角色,而且可极大拓宽光学信息的承载容量。与此同时,纳米科技的发展使得纳米光子学成为一个新兴学科,开辟了利用纳米结构... 详细信息

在过去的二十年中,携带轨道角动量的涡旋光引起了研究人员的广泛兴趣。涡旋光不仅在光与物质相互作用中扮演着重要角色,而且可极大拓宽光学信息的承载容量。与此同时,纳米科技的发展使得纳米光子学成为一个新兴学科,开辟了利用纳米结构和器件对光进行调控的新途径。当纳米技术和涡旋光相结合时,衍生出许多新的思路和概念。本文回顾和总结了基于纳米光子学的涡旋光产生、探测及其应用,并对该研究领域的未来进行了展望。

关键词：轨道角动量光与物质相互作用光学涡旋涡旋光纳米光子学光学信息纳米技术纳米科技

Radiative suppression of exciton-exciton annihilation in a two-dimensional semiconductor

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第9期12卷 1911-1920页

作者： Luca Sortino Merve Gülmüs Benjamin tilmann Leonardo de S.Menezes Stefan A.maier Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Center for NanoScience Faculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Departamento de Física Universidade Federal de Pernambuco50670-901 Recife-PEBrazil School of Physics and Astronomy Monash UniversityClaytonVIC 3800Australia the Blackett Laboratory Department of PhysicsImperial College LondonLondon SW72BWUK

two-dimensional(2D)semiconductors possess strongly bound excitons,opening novel opportunities for engineering light-matter interaction at the ***,their in-plane confinement leads to large non-radiative exciton–exciton annihilation(EEA)processes,setting a fundamental limit for their photonic *** this work,we demonstrate suppression of EEA via enhancement of light-matter interaction in hybrid 2D semiconductor-dielectric nanophotonic platforms,by coupling excitons in WS2 monolayers with optical Mie resonances in dielectric *** hybrid system reaches an intermediate light-matter coupling regime,with photoluminescence enhancement factors up to *** the exciton ultrafast dynamics reveal suppressed EEA for coupled excitons,even under high exciton densities>10^(12)cm^(−2).We extract EEA coefficients in the order of 10^(−3),compared to 10^(−2)for uncoupled monolayers,as well as a Purcell factor of *** results highlight engineering the photonic environment as a route to achieve higher quantum efficiencies,for low-power hybrid devices,and larger exciton densities,towards strongly correlated excitonic phases in 2D semiconductors.

关键词： annihilation dielectric coupling

In Vivo Function of tic22, a Protein Import Component of the Intermembrane Space of Chloroplasts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2013年第3期6卷 817-829页

作者： Mareike Rudolf Anu B. Machettira Lucia E. Groβ Katrin L. Weber Kathrin Bolte tihana Bionda Maik S. Sommer Uwe G. maier Andreas RM. Weber Enrico Schleiff Joanna tripp Department of Biosciences Molecular Cell Biology of Plants Center of Membrane Proteomics and Cluster of Excellence Frankfurt Goethe University Max-von-Laue Str. 9 D-60438 Frankfurt Germany Institute of Plant Biochemistry Heinrich-Heine-University Universitatsstr. 1 D-40225 Dusseldorf Germany Cell Biology Philipps University Marburg Karl-von-Frisch-Str. 8 D-35032 Marburg Germany LOEWE Center for Synthetic Microbiology (SYNMIKRO) Hans-Meerwein-Str. D-35032 Marburg Germany

Preprotein import into chloroplasts depends on macromolecular machineries in the outer and inner chloroplast envelope membrane （tOC and tIC）. It was suggested that both machineries are interconnected by components of the intermembrane space （IMS）. that is, amongst others, tic22, of which two closely related isoforms exist in Arabidopsis thaliana, namely attic22-III and attic22-IV. We investigated the function of tic22 in vivo by analyzing t-DNA insertion lines of the corresponding genes. While the t-DNA insertion in the individual genes caused only slight defects, a double mutant of both isoforms showed retarded growth, a pale phenotype under high-light conditions, a reduced import rate, and a reduction in the photosynthetic performance of the plants. the latter is supported by changes in the metabolite content of mutant plants when compared to wild-type. thus, our results support the notion that tic22 is directly involved in chloroplast preprotein import and might point to a particular importance of tic22 in chloroplast biogenesis at times of high import rates.

关键词： protein translocation tOC and tIC intermembrane space translocon chloroplast biogenesis metabolitecontent.

Hg_(1-x)Cd_xte反型层子能带结构的实验研究

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 Semiconductors 1990年第5期11卷 332-340页

作者：褚君浩 R.Sizmann F.Koch J.Ziegler H.maier 中国科学院上海技术物理研究所国家红外物理实验室 Physik-Department E-16 T.U.Munchen.8046 GarchingF.R.G. AEG 7100 Heilbronn F.R. G.

本文在4.2K下测定了液相外延HgCdte MIS结构样品的电容谱,磁阻振荡以及迴旋共振效应,并从实验测量结果,采用物理参数拟合法,确定了该样品在电量子限条件下反型层电子子能带结构,包括基态子能带能量E_o、费密能级E_F,子能带电子有效质量m... 详细信息

本文在4.2K下测定了液相外延HgCdte MIS结构样品的电容谱,磁阻振荡以及迴旋共振效应,并从实验测量结果,采用物理参数拟合法,确定了该样品在电量子限条件下反型层电子子能带结构,包括基态子能带能量E_o、费密能级E_F,子能带电子有效质量m~*(E_F)、m~*(E_o)、反型层平均厚度Z_i、耗尽层厚度Z_d,以及它们随子能带电子浓度N_s的变化。

关键词： HgCdte 能带结构反型层子实验