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Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía M.López Baptista K.Watanabe T.Taniguchi e.Diez j.e.Velázquez-Pérez y.M.Meziani j.M.Caridad j.A.Delgado-Notario Department of Applied Phy.ics University of Salamanca37008 SalamancaSpain Unidad de excelencia en Luz y.Materia estructurada(LUMeS) University of Salamanca37008 SalamancaSpain Research Center for electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology.Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent y.ars,graphene field-effect-transistors(GFeTs)have demonstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and *** features are essential to enable emerging THz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may.be utterly.compromised by.the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study.of the influence of internal device resistances in the photoresponse of high-mobility.dual-gate GFeT *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by.an order of magnitude and consequently.demonstrate an improved responsivity.and noise-equivalent-power values of the photodetector,*** results can be well understood by.a series resistance model,as shown by.the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility.graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasmonic

Cavity.agnostic acoustofluidic manipulations enabled by.guided flexural waves on a membrane acoustic waveguide actuator

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Microsy.tems & Nanoengineering 2024年第2期10卷 153-171页

作者： Philippe Vachon Srinivas Merugu jaibir Sharma Amit Lal eldwin j.Ng y.l Koh joshua e.-y.Lee Chengkuo Lee Department of electrical and Computer engineering National University of SingaporeSingaporeSingapore Institute of Microelectronics Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore SonicMeMS Laboratory School of Electrical and Computer EngineeringCornell UniversityIthacaNYUSA School of electrical and Data engineering University of Technology SydneyUltimoNSWAustralia

This article presents an in-depth exploration of the acoustofluidic capabilities of guided flexural waves(GFWs)generated by.a membrane acoustic waveguide actuator(MAWA).By.harnessing the potential of GFWs,cavity.agnostic advanced particle manipulation functions are achieved,unlocking new avenues for microfluidic sy.tems and lab-on-a-chip *** localized acoustofluidic effects of GFWs arising from the evanescent nature of the acoustic fields they.induce inside a liquid medium are numerically.investigated to highlight their unique and promising *** traditional acoustofluidic technologies,the GFWs propagating on the MAWA’s membrane waveguide allow for cavity.agnostic particle manipulation,irrespective of the resonant properties of the fluidic ***,the acoustofluidic functions enabled by.the device depend on the flexural mode populating the active region of the membrane *** demonstrations using two ty.es of particles include in-sessile-droplet particle transport,mixing,and spatial separation based on particle diameter,along with streaming-induced counter-flow virtual channel generation in microfluidic PDMS *** experiments emphasize the versatility.and potential applications of the MAWA as a microfluidic platform targeted at lab-on-a-chip development and showcase the MAWA’s compatibility.with existing microfluidic sy.tems.

关键词： waveguide fluid cavity

Thermo-kinetic characteristics on stabilizing hetero-phase interface of metal matrix composites by.cry.tal plasticity.finite element method

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journal of Materials Science & Technology 2024年第2期169卷 53-67页

作者： y.B.Zhang S.j.Song F.Liu State Key.Laboratory.of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Analy.ical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China

Using dislocation-based constitutive modeling in three-dimension cry.tal plasticity.finite element(3D CPFe)simulations,co-deformation and instability.of hetero-phase interface in different material sy.tems were herein studied for poly.ry.talline metal matrix composites(MMCs).Local stress and strain fields in two ty.es of 3lay.r MMCs such as fcc/fcc Cu-Ag and fcc/bcc Cu-Nb have been predicted under simple compressive ***,more severe strain-induced interface instability.can be observed in the fcc/bcc sy.tems than in the fcc/fcc sy.tems upon refining to metallic nanolay.red composites(MNCs).By.detailed analy.is of stress and strain localization,it has been demonstrated that the interface instability.is alway. accompanied by.high-stress concentration,i.e.,thermody.amic characteristics,or high strain prevention i.e.,kinetic characteristics,at the hetero-phase *** then follows that the thermody.amic driving forceG and the kinetic energy.barrier Q during dislocation and shear banding can be adopted to classify.the deformation modes,following the so-called thermo-kinetic *** by.inserting a high density.of high-energy.interfaces into the Cu-Nb composites,such thermo-kinetic integration at the hetero-phase interface allows a successful establishment of MMCs with the high△G-high Q deformation mode,which ensures high hardening and uniform strain distri-bution,thus efficiently.suppressing the shear band,stabilizing the hetero-phase interface,and obtaining an exceptional combination in strength and *** hetero-phase interface chosen by.a couple of thermody.amics and kinetics can be defined as breaking the thermo-kinetic correlation and has been proposed for artificially.designing MNCs.

关键词： Thermody.amics and kinetics Phy.ics-based constitutive modeling Hetero-phase interface Cry.tal plasticity.finite element

Recent developments in selective laser processes for wearable devices

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Bio-Design and Manufacturing 2024年第4期7卷 517-547页

作者： y.ungchan Kim eunseung hwang Chang Kai Kaichen Xu Heng Pan Sukjoon Hong Optical Nanoprocessing Lab Department of Mechanical EngineeringBK21 FOUR ERICA-ACE CenterHanyang University55 Hanyangdaehak-RoSangnok-GuAnsan 15588Republic of Korea Multiscale Manufacturing Lab J.Mike Walker’66 Department of Mechanical EngineeringTexas A&M UniversityCollege StationTX 77843USA State Key.Laboratory.of Fluid Power and Mechatronic Sy.tems School of Mechanical EngineeringZhejiang UniversityHangzhou 310058China

Recently.the increasing interest in wearable technology.for personal healthcare and smart virtual/augmented reality.applications has led to the development of facile fabrication *** have long been used to develop original solutions to such challenging technological problems due to their remote,sterile,rapid,and site-selective processing of *** this review,recent developments in relevant laser processes are summarized under two separate ***,transformative approaches,such as for laser-induced graphene,are *** addition to design optimization and the alteration of a native substrate,the latest advances under a transformative approach now enable more complex material compositions and multilay.r device configurations through the simultaneous transformation of heterogeneous precursors,or the sequential addition of functional lay.rs coupled with other electronic *** addition,the more conventional laser techniques,such as ablation,sintering,and sy.thesis,can still be used to enhance the functionality.of an entire sy.tem through the expansion of applicable materials and the adoption of new ***,various wearable device components developed through the corresponding laser processes are discussed,with an emphasis on chemical/phy.ical sensors and energy.*** addition,special attention is given to applications that use multiple laser sources or processes,which lay.the foundation for the all-laser fabrication of wearable devices.

关键词： Selective laser process Wearable device Transformative approach Laser-induced graphene Ablation Sintering Sy.thesis

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蜂花粉中多酚类化合物的研究进展

中国蜂业 2024年第4期75卷 36-42页

作者：蔡雯雯(编译) 董捷乔(编译) 江涛(编译) Qiao j Zhang y.Haubruge e 哈尔滨商业大学食品工程学院哈尔滨150076 资源昆虫高效养殖与利用全国重点实验室中国农业科学院蜜蜂研究所北京100093 不详

蜂花粉是由蜜蜂采集加工而成的花粉团状物,其富含大量的生物活性物质,包括多糖、蛋白质、脂质、多酚等,具有较高的药用功效和食用价值。多项研究表明多酚类化合物具有特定的抗氧化、抗菌、抗糖尿病、抗高血脂以及抗炎等作用。蜂花粉的... 详细信息

蜂花粉是由蜜蜂采集加工而成的花粉团状物,其富含大量的生物活性物质,包括多糖、蛋白质、脂质、多酚等,具有较高的药用功效和食用价值。多项研究表明多酚类化合物具有特定的抗氧化、抗菌、抗糖尿病、抗高血脂以及抗炎等作用。蜂花粉的多酚类化合物,特别是酚胺和黄酮苷已成为近期研究重点,也是蜂花粉发挥重要活性功能的主要成分。本文综述了近年来世界各地不同种类的蜂花粉中多酚类化合物的成分及含量,为蜂花粉后续研究提供参考。

关键词：蜂花粉多酚含量

STCF conceptual design report (Volume 1): Phy.ics & detector

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Frontiers of phy.ics 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.Barny.kov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomy.gkov A.Bondar I.Boy.o 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.Ly. X.R.Ly. 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.Ouy.ng 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.Py.ta 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 Phy.ics Novosibirsk 630090Russia CAS Key.Laboratory.of Theoretical Phy.ics 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 Poly.echnique 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.Phy.ics 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.Phy.ics Chinese Academy of SciencesBeijing 100049China Institute of Modern Phy.ics Chinese Academy of SciencesLanzhou 730000China Institute of Phy.ics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Phy.ics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm facility.STCF)is an electron–positron collider proposed by.the Chinese particle phy.ics *** 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 asy.metry.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 phy.ics bey.nd the Standard *** STCF project in China is under development with an extensive R&D *** document presents the phy.ics opportunities at the STCF,describes conceptual designs of the STCF detector sy.tem,and discusses future plans for detector R&D and phy.ics case studies.

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

Four Late-ty.e Galaxies with Double Radio Lobes and Properties of Such Galaxies

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Research in Astronomy.and Astrophy.ics 2024年第4期24卷 84-90页

作者： Z.S.y.an 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-ty.e 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 survey. 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-ty.e 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 display.ng a disturbed *** suggest that all of the galaxy.mass,color and surrounding environment could play.important roles in triggering radio lobes in late-ty.e galaxies.

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

Predicting Purchasing Behavior on e-Commerce Platforms: A Regression Model Approach for Understanding User Features that Lead to Purchasing

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International journal of Communications, Network and Sy.tem Sciences 2024年第6期17卷 81-103页

作者： Abraham jallah Baly.mah Sonkarlay.j. y. Weamie jiang Bin Karmue Vasco jarnda Felix jwakdak joshua College of Computer Science and engineering Hunan University Changsha China Department of Health Inspection and Quarantine Xiangya School of Public Health Central South University Changsha China

This research introduces a novel approach to improve and optimize the predictive capacity.of consumer purchase behaviors on e-commerce platforms. This study.presented an introduction to the fundamental concepts of the logistic regression algorithm. In addition, it analy.ed user data obtained from an e-commerce platform. The original data were preprocessed, and a consumer purchase prediction model was developed for the e-commerce platform using the logistic regression method. The comparison study.used the classic random forest approach, further enhanced by.including the K-fold cross-validation method. evaluation of the accuracy.of the model’s classification was conducted using performance indicators that included the accuracy.rate, the precision rate, the recall rate, and the F1 score. A visual examination determined the significance of the findings. The findings suggest that employ.ng the logistic regression algorithm to forecast customer purchase behaviors on e-commerce platforms can improve the efficacy.of the approach and y.eld more accurate predictions. This study.serves as a valuable resource for improving the precision of forecasting customers’ purchase behaviors on e-commerce platforms. It has significant practical implications for optimizing the operational efficiency.of e-commerce platforms.

关键词： e-Commerce Platform Purchasing Behavior Prediction Logistic Regression Algorithm

Ground-based and additional science support for SMILe

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earth and Planetary.Phy.ics 2024年第1期8卷 275-298页

作者： j.A.Carter M.Dunlop C.Forsy.h K.Oksavik e.Donovon A.Kavanagh S.e.Milan T.Sergienko R.C.Fear D.G.Sibeck M.Connors T.y.oman X.Tan M.G.G.T.Tay.or K.McWilliams j.Gjerloev R.Barnes D.D.Billet G.Chisham A.Dimmock M.P.Freeman D.-S.Han M.D.Hartinger S.-y.W.Hsieh Z.-j.Hu M.K.james L.juusola K.Kauristie e.A.Kronberg M.Lester j.Manuel j.Matzka I.McCrea y.Miy.shi j.Rae L.Ren F.Sigernes e.Spanswick K.Sterne A.Steuwer T.Sun M.-T.Walach B.Walsh C.Wang j.Wey.and j.Wild j.y.n j.Zhang Q.-H.Zhang Planetary.Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory.Space Science Technology Facilities CouncilOxfordshireUK School of Space and environment Beihang UniversityBeijing 100191China Key.Laboratory.of Space environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and Climate Phy.ics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Phy.ics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Phy.ics KirunaSweden West Highfield Campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space Flight Center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada eSTeC European Space AgencyNetherlands University.of Saskatchewan SaskatoonCanada The johns Hopkins University.Applied Phy.ics Laboratory LaurelMarylandUSA Swedish Institude of Space Phy.ics UppsalaSE 75121Sweden Tongji University Shanghai 200092China Center for Space Plasma Phy.ics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish Meteorological Institute(FMI) Finland Department of earth and environmental Sciences(Geophy.ics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada GFZ German Research Centre for Geosciences PotsdamGermany Nagoy. University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic Geophy.ics University Centre in Svalbard

The joint european Space Agency.and Chinese Academy.of Sciences Solar wind Magnetosphere Ionosphere Link explorer(SMILe)mission will explore global dy.amics of the magnetosphere under vary.ng solar wind and interplanetary.magnetic field conditions,and simultaneously.monitor the auroral response of the Northern Hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety.of cadences by.additional ground-based and space-based instruments will enable a much greater scientific impact bey.nd the original goals of the SMILe ***,we describe current community.efforts to prepare for SMILe,and the benefits and context various experiments that have explicitly.expressed support for SMILe can offer.A dedicated group of international scientists representing many.different experiment ty.es and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online SMILe Data Fusion Facility.the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community.engagement with the SMILe mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMILe conjunctions missions