检索结果-内蒙古大学图书馆

Transactions on Electrical and Electronic materials 2023年第1期25卷 120-120页

作者： Khan, Faiza Mubashir, Talha Ahmed, Kainat Mateen, Abdul Lee, Soonil Ahmed, Tauseef Department of Nanoscience and Technology Preston Institute of Nanoscience and Technology PINSAT Islamabad Pakistan Department of Applied Ecology and Biotechnology Inland Norway University of Applied Sciences Hamar Norway Interdisciplinary Program in Senior Human Ecology Changwon National University Gyeongnam Republic of Korea Department of Mineral Processing Engineering Pak-Austria Fachhochschule Institute of Applied Sciences & Technology Haripur Pakistan School of Materials Science and Engineering Changwon National University Gyeongnam Republic of Korea Department of Materials Science & Engineering Institute of Space Technology Islamabad Pakistan

Charge and Energy Transfer Dynamics of Hybridized Exciton-Polaritons in 2D Halide Perovskites

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Anantharaman, Surendra B. Lynch, Jason Stevens, Christopher E. Munley, Christopher Li, Chentao Hou, Jin Zhang, Hao Torma, Andrew Darlington, Thomas Coen, Francis Li, Kevin Majumdar, Arka Schuck, P. James Mohite, Aditya Harutyunyan, Hayk Hendrickson, Joshua R. Jariwala, Deep Department of Electrical and Systems Engineering University of Pennsylvania PhiladelphiaPA19104 United States KBR Inc. BeavercreekOH45431 United States Air Force Research Laboratory Sensors Directorate Wright-Patterson Air Force Base OH45433 United States Department of Physics University of Washington SeattleWA98195 United States Department of Physics Emory University AtlantaGA30322 United States Department of Chemical and Biomolecular Engineering Rice University HoustonTX77005 United States Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States Applied Physics Program Smalley‐Curl Institute Rice University HoustonTX77005 United States Department of Mechanical Engineering Columbia University New YorkNY10027 United States Department of Electrical and Computer Engineering University of Washington SeattleWA98195 United States

Excitons, bound electron-hole pairs, in Two-Dimensional Hybrid Organic Inorganic Perovskites (2D HOIPs) are capable of forming hybrid light-matter states known as exciton-polaritons (E-Ps) when the excitonic medium is confined in an optical cavity. In the case of 2D HOIPs, they can self-hybridize into E-Ps at specific thicknesses of the HOIP crystals that form a resonant optical cavity with the excitons. However, the fundamental properties of these self-hybridized E-Ps in 2D HOIPs, including their role in ultrafast energy and/or charge transfer at interfaces, remain unclear. Here, we demonstrate that > 0.5 µm thick 2D HOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E-P modes. These E-Ps have high Q factors (> 100) and modulate the optical dispersion for the crystal to enhance sub-gap absorption and emission. Through varying excitation energy and ultrafast measurements, we also confirm energy transfer from higher energy upper E-Ps to lower energy, lower E-Ps. Finally, we also demonstrate that E-Ps are capable of charge transport and transfer at interfaces. Our findings provide new insights into charge and energy transfer in E-Ps opening new opportunities towards their manipulation for polaritonic devices. © 2023, CC BY.

关键词： Charge transfer

Carbon-in-carbon: Hybrid carbonized nanomaterials with multifunctional activities for the treatment of endophthalmitis

学校读者我要写书评

暂无评论

Chemical engineering Journal 2024年 491卷

作者： Jian, Hong-Jyuan Chiou, Yi-Ru Anand, Anisha Chen, Chien-Fu Ma, David Hui-Kang Lai, Jui-Yang Huang, Chih-Ching Chang, Huan-Tsung Department of Biomedical Engineering Chang Gung University Taoyuan33302 Taiwan Institute of Applied Mechanics National Taiwan University Taipei10617 Taiwan Department of Ophthalmology Chang Gung Memorial Hospital Taoyuan Linkou33305 Taiwan Department of Chinese Medicine Chang Gung University Taoyuan33302 Taiwan Department of Materials Engineering Ming Chi University of Technology New Taipei City24301 Taiwan Research Center for Chinese Herbal Medicine College of Human Ecology Chang Gung University of Science and Technology Taoyuan33303 Taiwan Department of Bioscience and Biotechnology National Taiwan Ocean University Keelung20224 Taiwan Department of Biomedical Sciences Chang Gung University Taoyuan33302 Taiwan Graduate Institute of Biomedical Sciences Chang Gung University Taoyuan33302 Taiwan Center for Advanced Biomaterials and Technology Innovation Chang Gung University Taoyuan33302 Taiwan Division of Breast Surgery Department of General Surgery Chang Gung Memorial Hospital Taoyuan Linkou33305 Taiwan

Infectious endophthalmitis (EO) is a severe eye condition characterized by inflammation of the eye's internal fluids and tissues, often resulting from infection by bacteria or fungi. Patients with EO typically experience reduced vision, pain, and conjunctival infection. Despite the use of antibiotics, challenges such as inflammation and drug resistance remain. In this work, we have developed dextran/aliphatic diamines carbonized nanogels (DEX/ADA-CNGs) as board-spectrum antimicrobial agents by a one-step mild carbonization procedure. The CNGs exhibit not only antimicrobial properties but also show good drug delivery potential. Curcumin-based carbon quantum dots (Cur-CQDs) as an anti-inflammatory agent are loaded into DEX/ADA-CNGs to form hybrid carbon-in-carbon nanocomposites (Cur-CQDs@DEX/ADA-CNGs), showing combined antimicrobial, antioxidative, and anti-inflammatory activities. Impressively, CQDs@DEX/ADA-CNGs maintain strong antibacterial effectiveness against drug-resistant strains, with minimum inhibitory concentrations below 110 µg mL−1. The Cur-CQDs@DEX/ADA-CNGs have demonstrated high biocompatibility both in vitro and in vivo. In a rat model of EO, they rapidly (less than 5 days) reduce microbial infection and inflammation in the eye. Given these promising results, Cur-CQDs@DEX/ADA-CNGs show great potential as an enduring intravitreal treatment option for infectious EO. © 2024 Elsevier B.V.

关键词： Nanogels

Stability, metallicity, and magnetism in niobium silicide nanofilms

学校读者我要写书评

暂无评论

Physical Review materials 2022年第6期6卷 064402-064402页

作者： Xuezeng Lu Dominic P. Goronzy Carlos G. Torres-Castanedo Paul Masih Das Maryam Kazemzadeh-Atoufi Anthony McFadden Corey Rae H. McRae Peter W. Voorhees Vinayak P. Dravid Michael J. Bedzyk Mark C. Hersam James M. Rondinelli Department of Materials Science and Engineering Northwestern University Evanston Illinois 60208 USA International Institute for Nanotechnology Northwestern University Evanston Illinois 60208 USA National Institute of Standards and Technology Boulder Colorado 80305 USA Department of Electrical Computer & Energy Engineering University of Colorado Boulder Boulder Colorado 80309 USA Department of Physics University of Colorado Boulder Colorado 80309 USA Northwestern University Atomic and Nanoscale Characterization Experimental Center (NUANCE) Northwestern University Evanston Illinois 60208 USA Department of Physics and Astronomy Northwestern University Evanston Illinois 60208 USA Applied Physics Program Northwestern University Evanston Illinois 60208 USA Department of Chemistry Northwestern University Evanston Illinois 60208 USA Department of Electrical and Computer Engineering Northwestern University Evanston Illinois 60208 USA

Modern superconducting qubits based on two-dimensional (2D) transmons typically involve the growth of Nb thin films on high-resistivity Si substrates. Since imperfections at the Nb-Si heterointerface have been implicated as a source of two-level systems that limit quantum coherence times, detailed characterization and understanding of niobium silicide interfacial layers are critical to improving superconducting qubit technology. While bulk binary intermetallic niobium silicide phases are well understood, the thermodynamic phase stability and properties of ultrathin niobium silicides, such as those found at the Nb-Si heterointerface in 2D transmons, have not yet been explored. Here, we report finite-sized effects for ultrathin niobium silicide films using density functional theory calculations and predict nanoscale stabilization of Nb6Si5 over the bulk α−Nb5Si3 phase. This result is consistent with our experimental observations of a niobium silicide interfacial layer between a sputtered Nb thin film and the underlying Si substrate. Furthermore, our calculations show that Nb6Si5 nanofilms are nonmagnetic, making them superior to nanofilms of α−Nb5Si3 that exhibit antiferromagnetic correlations detrimental to long coherence times in superconducting qubits. By providing atomic-scale insight into niobium silicide nanofilms, this paper can help guide ongoing efforts to optimize Nb-Si heterointerfaces for long coherence times in superconducting qubits.

关键词： Interface & surface thermodynamics Interfaces Superconducting qubits Thin films Density functional theory

Interface Rotation in Cu/Nb Accumulative Roll Bonded (ARB) Nanolaminates

学校读者我要写书评

暂无评论

SSRN

SSRN 2022年

作者： Radchenko, Ihor Zhu, Wenxin Qing, Liu Navarro, Etienne Sahay, Rahul Lee, Pooi See Raghavan, Nagarajan Thomas, Olivier Budiman, Arief Suriadi Chen, Kai State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an China School of Materials Science and Engineering Nanyang Technological University Singapore639798 Singapore Nanyang Technological University Temasek Laboratories@NTU 637553 Singapore Aix Marseille Université Université de Toulon CNRS IM2NP Marseille France Xtreme Mechanics Lab 8 Somapah Road Singapore487372 Singapore Singapore487372 Singapore Department of Manufacturing and Mechanical Engineering and Technology Oregon Institute of Technology Klamath FallsOR97601 United States Industrial Engineering Department BINUS Graduate Program—Master of Industrial Engineering Bina Nusantara University Jakarta11480 Indonesia

Metal-metal nanolaminates made by accumulative roll bonding (ARB) is a developing new class of structural nanocomposites that possesses high strength, good ductility, and can also be produced in bulk. These nanolaminates exhibit strong crystallographic textures and mechanical anisotropy. Yet, their mechanical properties are often measured only along rolling direction (RD). Using in situ pillar compression, we show that in-plane shear deformation mechanism in Cu(63 nm)/Nb(63 nm) ARB nanolaminate strongly depends on the shear direction. Plastic shear along the RD abruptly changes into crystallographic rotation and later into interface shear as the shear direction deviates away from the RD. The observed shear mechanisms are driven by competition between different slip systems in Cu layers and at the interface. We expect similar deformation anisotropy to happen in other ARB nanolaminates with sharp texture and interface orientation. Comprehensive characterization of such nanolaminates may require considering more than just the usual rolling/transverse/normal direction anisotropy. © 2022, The Authors. All rights reserved.

关键词： Anisotropy

Tuning the Magnetocrystalline Anisotropy of Rare-Earth Free L10-Ordered Mn1-Xtmxal Magnetic

学校读者我要写书评

暂无评论

SSRN

SSRN 2022年

作者： Choi, Minyeong Hong, Yang-Ki Won, Hoyun Yeo, Chang-Dong Shah, Nayem Mohammed Reza Choi, Byoung-Chul Lee, Woncheol Choi-Yim, Haein Lee, Wooyoung Thiele, Jan-Ulrich Department of Electrical and Computer Engineering The University of Alabama TuscaloosaAL35487 United States Department of Mechanical Engineering Texas Tech University LubbockTX79409 United States Department of Physics and Astronomy University of Victoria VictoriaBCV8W 2Y2 Canada Samsung Electro-Mechanics Co. Ltd. Suwon Korea Republic of Department of Applied Physics Sookmyung Women’s University Seoul04310 Korea Republic of Department of Materials Science and Engineering Yonsei University Seoul03722 Korea Republic of Seagate Technology LLC FremontCA94538 United States

L 1 0 -ordered MnAl (τ-phase) alloy is ferromagnetic and possesses a reasonably high magnetocrystalline anisotropy energy;therefore, a good candidate for a rare-earth-free permanent magnet. Tuning of the magnetocrystalline anisotropy was studied by substituting Mn of MnAl with transition element (Fe, Co, or Ni). First-principles calculations based on density functional theory (DFT) were performed, as implemented in the WIEN2k, to calculate the electronic structures of Mn 0.5 TM 0.5 Al, where TM = Mn, Fe, Co, and Ni. The calculated total magnetic moment of Mn 0.5 TM 0.5 Al decreases as the number of valence electrons ( n ) of TM (e.g., 7 for Mn (3 d 5 4 s 2 ), 8 for Fe (3 d 6 4 s 2 ), 9 for Co (3 d 7 4 s 2 ), and 10 for Ni (3 d 8 4 s 2 )) increases. It was found that Ni-substituted MnAl becomes ferrimagnetic, while other TM substituted MnAl retain a ferromagnetic state. Curie temperature rapidly decreases with increasing the valence electrons from 685 K for MnAl to 20 K for Ni-substituted MnAl. Thermomagnetic behaviors of Mn 0.5 TM 0.5 Al (TM = Mn, Fe, Co, or Ni) are *** calculated magnetocrystalline anisotropy constant ( K ) of Mn 0.5 TM 0.5 Al is1.34 MJ/m 3 for TM = Mn, 2.98 MJ/m 3 for TM = Fe, -0.30 MJ/m 3 for TM = Co, and -0.18 MJ/m 3 for Ni. Our magnetocrystalline anisotropy energy (MAE) calculations confirm that the magnetocrystalline anisotropy changes to the out-of-plane (uniaxial) direction from the in-plane for Co- and Ni-substituted MnAl. The K reaches a maximum of 2.98 MJ/m 3 at n = 8, i.e. , Fe substitution. © 2022, The Authors. All rights reserved.

关键词： Binary alloys

Optimization of Extrusion Parameters for Composite Pla/Mg/Ha Filaments Using the Taguchi Method for Bone Scaffold

学校读者我要写书评

暂无评论

SSRN

SSRN 2025年

作者： Prakoso, Akbar Teguh Basri, Hasan Adanta, Dendy Gunawan Akbar, Imam Syahrom, Ardiyansyah Arifin, Amir Department of Mechanical Engineering Faculty of Engineering Universitas Sriwijaya Indralaya South Sumatra 30662 Indonesia Doctoral Program Study of Engineering Science Faculty of Engineering Universitas Sriwijaya Palembang South Sumatra30139 Indonesia Applied Mechanics and Design Faculty of Mechanical Engineering Universiti Teknologi Malaysia Johor Bahru Skudai81310 Malaysia Universiti Teknologi Malaysia Johor Bahru Skudai81310 Malaysia

This paper attempts to optimise the single screw extrusion (SSE) process parameters for extruding polylactic acid (PLA)/magnesium (Mg)/hydroxyapatite (HA) composite filament, aiming for a final filament diameter of 1.75 mm to enhance process efficiency and output quality. In this study, the Taguchi method was employed to systematically evaluate how screw speed, nozzle diameter, material composition, and temperature affect filament diameter. The analysis demonstrated that screw speed, nozzle diameter, material composition, and temperature significantly affect the filament diameter. Under optimal conditions (94% wt PLA, 4% wt Mg, and 2% wt HA, 1.95 mm nozzle diameter, 6 rpm screw speed, and 175°C), the resulting filament diameter closely approached 1.75 mm. These findings enhance the fabrication efficiency and quality of composite filaments, with promising applications in advanced bone scaffolds. © 2025, The Authors. All rights reserved.

关键词： Scaffolds (biology)

Observation of the Magnonic Dicke Superradiant Phase Transition

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Kim, Dasom Dasgupta, Sohail Ma, Xiaoxuan Park, Joong-Mok Wei, Hao-Tian Luo, Liang Doumani, Jacques Li, Xinwei Yang, Wanting Cheng, Di Kim, Richard H.J. Everitt, Henry O. Kimura, Shojiro Nojiri, Hiroyuki Wang, Jigang Cao, Shixun Bamba, Motoaki Hazzard, Kaden R.A. Kono, Junichiro Applied Physics Graduate Program Smalley–Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Ames National Laboratory AmesIA50011 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Physics International Center of Quantum and Molecular Structures Materials Genome Institute Shanghai University Shanghai200444 China Department of Physics National University of Singapore 117551 Singapore Department of Physics and Astronomy Iowa State University AmesIA50011 United States Smalley–Curl Institute Rice University HoustonTX77005 United States DEVCOM Army Research Laboratory-South HoustonTX77005 United States Institute for Materials Research Tohoku University Sendai980-8577 Japan Department of Physics Yokohama National University Yokohama240-8501 Japan Department of Physics and Astronomy University of California DavisCA95616 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States

Two-level atoms coupled with single-mode cavity photons are predicted to exhibit a quantum phase transition when the coupling strength exceeds a critical value, entering a phase in which atomic polarization and photonic field are finite even at zero temperature and without external driving. However, this phenomenon, the superradiant phase transition (SRPT), is forbidden by a no-go theorem due to the existence of the diamagnetic term in the Hamiltonian. Here, we present spectroscopic evidence for a magnonic SRPT in ErFeO3, where the role of the photonic mode (two-level atoms) in the photonic SRPT is played by an Fe3+ magnon mode (Er3+ spins). The absence of the diamagnetic term in the Fe3+–Er3+ exchange coupling ensures that the no-go theorem does not apply. Terahertz and gigahertz magnetospectroscopy experiments revealed the signatures of the SRPT – a kink and a softening, respectively, of two spin–magnon hybridized modes at the critical point. Copyright © 2024, The Authors. All rights reserved.

关键词： Phase transitions

Persistent flat band splitting and strong selective band renormalization in a kagome magnet thin film

学校读者我要写书评

暂无评论

arXiv 2024年

作者： Ren, Zheng Huang, Jianwei Tan, Hengxin Biswas, Ananya Pulkkinen, Aki Zhang, Yichen Xie, Yaofeng Yue, Ziqin Chen, Lei Xie, Fang Allen, Kevin Wu, Han Ren, Qirui Rajapitamahuni, Anil Kundu, Asish K. Vescovo, Elio Kono, Junichiro Morosan, Emilia Dai, Pengcheng Zhu, Jian-Xin Si, Qimiao Minár, Ján Yan, Binghai Yi, Ming Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Condensed Matter Physics Weizmann Institute of Science Rehovot Israel New Technologies-Research Center University of West Bohemia Plzeň301 00 Czech Republic Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States National Synchrotron Light Source II Brookhaven National Lab UptonNY United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Chemistry Rice University HoustonTX77005 United States Theoretical Division Center for Integrated Nanotechnologies Los Alamos National Laboratory Los AlamosNM United States

Magnetic kagome materials provide a fascinating playground for exploring the interplay of magnetism, correlation and topology. Many magnetic kagome systems have been reported including the binary FemXn (X=Sn, Ge;m:n = 3:1, 3:2, 1:1) family and the rare earth RMn6Sn6 (R = rare earth) family, where their kagome flat bands are calculated to be near the Fermi level in the paramagnetic phase. While partially filling a kagome flat band is predicted to give rise to a Stoner-type ferromagnetism, experimental visualization of the magnetic splitting across the ordering temperature has not been reported for any of these systems due to the high ordering temperatures, hence leaving the nature of magnetism in kagome magnets an open question. Here, we probe the electronic structure with angle-resolved photoemission spectroscopy in a kagome magnet thin film FeSn synthesized using molecular beam epitaxy. We identify the exchange-split kagome flat bands, whose splitting persists above the magnetic ordering temperature, indicative of a local moment picture. Such local moments in the presence of the topological flat band are consistent with the compact molecular orbitals predicted in theory. We further observe a large spin-orbital selective band renormalization in the Fe dxy+dx2-y2spin majority channel reminiscent of the orbital selective correlation effects in the iron-based superconductors. Our discovery of the coexistence of local moments with topological flat bands in a kagome system echoes similar findings in magic-angle twisted bilayer graphene, and provides a basis for theoretical effort towards modeling correlation effects in magnetic flat band systems. © 2024, CC BY.

关键词： Iron-based Superconductors

Multimode Ultrastrong Coupling in Three-Dimensional Photonic-Crystal Cavities

学校读者我要写书评

暂无评论

arXiv 2023年

作者： Tay, Fuyang Mojibpour, Ali Sanders, Stephen Liang, Shuang Xu, Hongjing Gardner, Geoff C. Baydin, Andrey Manfra, Michael J. Alabastri, Alessandro Hagenmüller, David Kono, Junichiro Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley–Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Purdue University West LafayetteIN47907 United States Birck Nanotechnology Center Purdue University West LafayetteIN47907 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States School of Electrical and Computer Engineering Purdue University West LafayetteIN47907 United States Smalley–Curl Institute Rice University HoustonTX77005 United States School of Materials Engineering Purdue University West LafayetteIN47907 United States Université de Strasbourg CNRS Strasbourg67000 France Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States

Recent theoretical studies have highlighted the role of spatially varying cavity electromagnetic fields in exploring novel cavity quantum electrodynamics (cQED) phenomena, such as the potential realization of the elusive Dicke superradiant phase transition. One-dimensional photonic-crystal cavities (PCCs), widely used for studying solid-state cQED systems, have uniform spatial profiles in the lateral plane. Three-dimensional (3D) PCCs, which exhibit discrete in-plane translational symmetry, overcome this limitation, but fabrication challenges have hindered the achievement of strong coupling in 3D-PCCs. Here, we report the realization of multimode ultrastrong coupling in a 3D-PCC at terahertz frequencies. The multimode coupling between the 3D-PCC’s cavity modes and the cyclotron resonance of a Landau-quantized two-dimensional electron gas in GaAs is significantly influenced by the spatial profiles of the cavity modes, leading to distinct coupling scenarios depending on the probe polarization. Our experimental results are in excellent agreement with a multimode extended Hopfield model that accounts for the spatial inhomogeneity of the cavity field. Guided by the model, we discuss the possible strong ground-state correlations between different cavity modes and introduce relevant figures of merit for the multimode ultrastrong coupling regime. Our findings emphasize the importance of spatially nonuniform cavity mode profiles in probing nonintuitive quantum phenomena expected for the ground states of cQED systems in the ultrastrong coupling regime. Copyright © 2023, The Authors. All rights reserved.

关键词： Electron cyclotron resonance