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2023 Sharjah International Conference on physics of Advanced Materials, SICPAM 2023

作者： Mustafa, Faisal Egilmez, Mehmet Abuzaid, Wael El-Khatib, Sami Department of Physics American University of Sharjah Sharjah26666 United Arab Emirates Materials Science and Engineering Program American University of Sharjah Sharjah26666 United Arab Emirates Department of Mechanical Engineering American University of Sharjah Sharjah26666 United Arab Emirates

There are significant scientific and industrial efforts to develop and optimize Iron-based shape memory alloys (SMA) such as FeMnNiAl for cost-sensitive applications. This alloy system shows shape memory and superelastic properties across a large temperature range. However, many studies have pointed out the need for rather complex thermo-mechanical treatments for the optimization of the SMA properties. In addition, works considering the effects of alloying on the development of microstructures that are more conducive to pseudo-elasticity in this system remain limited. Hence, systematic studies aiming at the investigation of the microstructural evolution of the FeMnNiAl(Gd) system are of great interest. In this study, solution heat treatment is done to tune the microstructure for optimum mechanical properties. The effect of phase distribution on mechanical properties is investigated at different heat treatments. Whereas cyclic heat treatment induced abnormal grain growth (AGG) in all samples, so large grains were obtained. The phase variation and elemental composition are analyzed by X-ray diffraction and Energy Dispersive Spectroscopy, respectively. The microstructure and phase distribution are observed using Scanning Electron Microscope and then related to the microhardness results. The microstructure has a good correlation with mechanical properties where the fine distribution of phases results in a higher hardness number. © Published under licence by IOP Publishing Ltd.

关键词： Microstructure

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Sensing beyond the exceptional point for high detectivity

Sensing beyond the exceptional point for high detectivity

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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Li, Zhichao Prasad, Ciril S. Wang, Xielin Zhang, Ding Naik, Gururaj V. Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States

Exceptional point (EP)-based optical sensors exhibit exceptional sensitivity but poor detectivity. Slightly off EP operation boosts detectivity without much loss in sensitivity. We experimentally demonstrate a high-detectivity-off-EP plasmonic-photonic hybrid sensor for anti-mouse IgG protein. © Optica Publishing Group 2024

关键词： Hybrid sensors

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Sensing beyond the exceptional point for high detectivity

Sensing beyond the exceptional point for high detectivity

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

ISBN: (纸本)9781957171395

关键词： Laser beams

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Lignocellulosic Biocomposite Membranes for Air Filtration and Environmental Protection:A Review

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Journal of Renewable Materials 2025年第2期13卷 251-272页

作者： Abiodun Abdulhameed Amusa Anwar Johari Kamil Kayode Katibi Ibrahim Garba Shitu Abdulrahman Oyekanmi Adeleke Mohd Fairus Mohd Yasin Muhammad Thalhah Zainal Center of Hydrogen Energy(CHE) Institute of Future Energy(IFE)Faculty of Chemical and Energy EngineeringUniversiti Teknologi Malaysia(UTM)Skudai81310Malaysia Department of Physics Faculty of ScienceUniversiti Putra MalaysiaUPM SerdangSerdang43400Malaysia Department of Agricultural and Biological Engineering Faculty of Engineering and TechnologyKwara State UniversityMalete23431Nigeria Department of Physics Faculty of Natural and Applied SciencesSule Lamido Universiti Kafin HausaKafin Hausa048Nigeria Institute of Nanoscience and Nanotechnology(INO2) Universiti Putra MalaysiaSerdang43400Malaysia Institute of Energy Infrastructure(IEI) Universiti Tenaga Nasional(UNITEN)Putrajaya CampusJalan Ikram-UnitenKajang43000Malaysia High-Speed Reacting Flow Laboratory(HiREF) Faculty of Mechanical EngineeringDepartment of Thermo-Fluids of Mechanical EngineeringUniversiti Teknologi MalaysiaSkudai81310Malaysia Department of Mechanical Precision Engineering(MPE) Malaysia-Japan International Institute of Technology(MJIIT)Universiti Teknologi MalaysiaKuala Lumpur54100Malaysia

The increasing severity of air pollution necessitates more effective and sustained air filtration ***,the desire for more environmentally friendly,sustainable materials with better filtering performance and less environmental impact drives the move away from conventional synthetic *** review presents lignocellulosic biocomposite(LigBioComp)membranes as an alternative to traditional synthetic *** focuses on their materials,fabrication,and functionalization techniques while exploring challenges and proposing methods for resourceful *** for their abundance and renewable nature,lignocellulosic materials consist of cellulose,hemicellulose,and *** applications can benefit from their antibacterial properties,large surface area,and remarkable mechanical *** membranes are fabricated through casting,electrospinning,and freeze-drying,with advancements in fabrication techniques enhancing their performance and *** is suggested to use solvent-free or low-solvent techniques such as Layer-by-Layer assembly to minimize environmental ***-drying and electrospinning with green solvents can be used for achieving specific membrane properties,though energy consumption should be *** dry-wet spinning and solvent casting processes *** groups,including carboxyl,hydroxyl,or amino groups,can significantly improve the membrane’s capacity to capture particulate *** etching or the precise deposition of nanoparticles can further optimize pore size and *** choice of chemicals and methods is critical in functionalization,with silane coupling agents,polyethyleneimine,and *** research should prioritize refining fabrication methods,advancing functionalization strategies,and conducting performance and recyclability assessments on hybrid and composite *** will enhance integrated systems and contribute to the developme

关键词： Lignocellulose biocomposites renewable materials sustainable membranes environmental protection particulate matter removal air filtration technology

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Nonreciprocal scintillation using magneto-optical photonic crystals 15

Nonreciprocal scintillation using magneto-optical photonic c...

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Photonic and Phononic Properties of Engineered Nanostructures XV 2025

作者： Long, Olivia Y. Pajovic, Simo Roques-Carmes, Charles Tsurimaki, Yoichiro Rivera, Nicholas Soljačić, Marin Boriskina, Svetlana V. Fan, Shanhui Department of Applied Physics Stanford University StanfordCA94305 United States Department of Mechanical Engineering Massachusetts Institute of Technology CambridgeMA02139 United States E. L. Ginzton Laboratory Department of Electrical Engineering Stanford University StanfordCA94305 United States Department of Physics Harvard University CambridgeMA02138 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States

ISBN: (纸本)9781510685024

Scintillation describes the conversion of high-energy particles into light in transparent media and finds diverse applications such as high-energy particle detection and industrial and medical imaging. This process operates on multiple timescales, with the final radiative step consisting of spontaneous emission, which can be modeled within the framework of fluctuational electrodynamics. Scintillation can therefore be controlled and enhanced via nanophotonic effects, which has been experimentally demonstrated in recent works. Such designs have thus far obeyed Lorentz reciprocity, meaning there is a direct equivalence between scintillation emission from the design and absorption of a plane wave in the far-field. However, scintillators that do not obey reciprocity have not been explored, even though they represent a novel platform for probing emission which is both nonequilibrium and nonreciprocal in nature. In this work, we propose to harness nonreciprocity to achieve directional control of scintillation emission, granting an additional degree of control over scintillation. Such directionality of light output is important in improving collection efficiencies along off-normal directions towards detectors in certain radiation detection schemes. We present the design of a nonreciprocal scintillator using a one-dimensional magnetophotonic crystal in the Voigt configuration. Our work demonstrates the potential of controlling nonequilibrium emission such as scintillation by breaking reciprocity and expands the space of nanophotonic design for achieving such control. © 2025 SPIE.

关键词： Spontaneous emission

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AI Aided GPR Data Multipath Summation Using x-t Stacking Weights 47

AI Aided GPR Data Multipath Summation Using x-t Stacking Wei...

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47th International Conference on Telecommunications and Signal Processing, TSP 2024

作者： Nikos, Economou Sobhi, Nasir Said, Al Abri Al Shaqsi, Bader Hamdan, Hamdan School of Mineral Resources Engineering Technical University of Crete Applied Geophysics Lab Chania Greece Sultan Qaboos University College of Science Department of Earth Sciences Muscat Oman Sharjah University Petroleum Geosciences and Remote Sensing Program Department of Applied Physics and Astronomy United Arab Emirates

ISBN: (纸本)9798350365597

Migration velocity of Ground Penetrating Radar (GPR) data is a low wavenumber attribute crucial for migration. Obtaining a migration velocity model, which is considered closer to a Root Mean Square (RMS) model, from zero-offset (ZO) data requires analysis of the available diffractions whose density and (x, t) coverage is random. Thus, accuracy and efficiency of such a velocity model either for migration or its usage for interval velocity model estimation is not guaranteed. Here, with the aid of an Artificiaal Intelligence (AI) algorithm, which detects diffractions and usage of their kinematic information, we generate a diffraction velocity model used for the assignment of 2D weights for weighted multipath summation. The scope is to efficiently focus the scattered energy within a GPR section. We describe this methodology and demonstrate its application in enhancing the lateral continuity of reflections. We compare it with the multipath summation using lD weights with simulated data and present its application on marble assessment GPR data for imaging cracks in the subsurface structure. © 2024 IEEE.

关键词： Diffraction

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Temperature-Dependent Electrical Resistivity in Sn-Bi Alloys 23

Temperature-Dependent Electrical Resistivity in Sn-Bi Alloys

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23rd International Conference on Electronics Packaging, ICEP 2024

作者： Tan, Xin F. Hao, Qichao Zhou, Jiye McDonald, Stuart D. Sweatman, Keith Nogita, Kazuhiro School Of Mechanical And Mining Engineering The University Of Queensland QLD4072 Australia Kyushu University Department Of Applied Quantum Physics And Nuclear Engineering Fukuoka819-0395 Japan Nihon Superior Co. Ltd. Osaka564-0063 Japan

ISBN: (纸本)9784991191176

Low temperature solders based on the Sn-Bi system have caught the attention of the electronics manufacturing industry as they make possible electronics assembly at lower temperatures, bringing technical, economic, and environmental benefits. However, the solid solubility of Bi in Sn ranges from around 3 wt% at room temperature to 21 wt% at the eutectic temperature of 139°C. This is expected to affect the electrical resistivity of the Sn-Bi alloys as temperature fluctuates during normal operations of electronic devices. This study investigates the change in electrical resistivity of a low temperature solder based on Sn-37wt%Bi with additions of Cu, Ni and Sb. The electrical resistivity of the alloy is found to increase non-linearly with temperature. Overall the resistance is slightly higher than that of the base Sn-37wt%Bi alloy and this is due to the presence of the (Cu,Ni)6Sn5 intermetallic and dissolved Sb in the Sn phase, while being lower than that of the near-eutectic Sn-57wt%Bi alloy. © 2024 Japan Institute of Electronics Packaging.

关键词： Binary alloys

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Scalable and eco-friendly flexible loudspeakers for distributed human-machine interactions

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npj Flexible Electronics 2023年第1期7卷 89-98页

作者： Yucong Pi Qiutong Liu Zhaoyang Li Dazhe Zhao Kaijun Zhang Zhirui Liu Bingpu Zhou Iek Man Lei Yuan Ma Junwen Zhong Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics University of MacaoMacao SAR 999078China Department of Mechanical Engineering and Research Institute for Intelligent Wearable Systems The Hong Kong Polytechnic UniversityHong KongChina Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao 999078China

Flexible loudspeakers that can be easily distributed in the surrounding environment are essential for creating immersive experiences in human-machine interactions,as these devices can transmit acoustic information *** this paper,we present a flexible electret loudspeaker that offers numerous benefits,such as eco-friendly,easy fabrication,flexible customization,strong durability,and excellent *** output sound pressure level(SPL)and frequency response characteristic are optimized according to the simulation and experiment *** a distance of 50 meters,a large-size loudspeaker(50×40 cm^(2))can produce an average SPL of 60 dB(normal SPL range of human voices is between 40 to 70 dB).The frequency response of our loudspeaker is high and relatively consistent up to 15 kHz,which covers the normal frequency range of human voices(<8 kHz).As demonstrated in this work,our loudspeakers can be used for scalable applications,such as being integrated with curtains or hung up like posters,offering a promising and practical solution for creating better human-machine interaction experiences.

关键词： speakers durability offering

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Excitations in layered materials from a non-empirical Wannier-localized optimally-tuned screened rangeseparated hybrid functional

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npj Computational Materials 2024年第1期10卷 132-140页

作者： María Camarasa-Gómez Stephen E.Gant Guy Ohad Jeffrey B.Neaton Ashwin Ramasubramaniam Leeor Kronik Department of Molecular Chemistry and Materials Science Weizmann Institute of ScienceRehovoth7610001Israel Department of Physics University of CaliforniaBerkeleyCA94720USA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA94720USA Kavli Energy NanoSciences Institute at Berkeley University of CaliforniaBerkeleyCA94720USA Department of Mechanical and Industrial Engineering University of Massachusetts AmherstAmherstMA01003USA Materials Science and Engineering Graduate Program University of MassachusettsAmherstAmherstMA01003USA

Accurate prediction of electronic and optical excitations in van der Waals(vdW)materials is a long-standing challenge for density functional *** recent Wannier-localized optimally-tuned screened range-separated hybrid(WOT-SRSH)functional has proven successful in non-empirical determination of electronic band gaps and optical absorption spectra for covalent and ionic ***,for vdW materials the tuning of the material-and structure-dependent functional parameters has only been attained ***,we present a non-empirical WOT-SRSH approach applicable to vdW materials,with the optimal functional parameters transferable between monolayer and *** apply this methodology to prototypical vdW materials:black phosphorus,molybdenum disulfide,and hexagonal boron nitride(in the latter case including zero-point renormalization).We show that the WOT-SRSH approach consistently achieves accuracy levels comparable to experiments and many-body perturbation theory(MBPT)calculations for band structures and optical absorption spectra,both on its own and as an optimal starting point for MBPT calculations.

关键词： theory optimal functional

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Spectral change and far-red emission of Mn^(2+)ions co-doped NaSrB_(5)O_(9):Dy^(3+)luminescence material for plant growth LEDs

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Journal of Rare Earths 2022年第2期40卷 218-225,I0002页

作者： K.Munirathnam Koduru Mallikarjuna R.Vijaya P.C.Nagajyothi K.Ramakrishna Reddy M.Srinivas Department of Physics School of Applied SciencesREVA UniversityBengaluru560064India Department for Management of Science and Technology Development Ton Due Thang UniversityHo Chi Minh CityVietnam Faculty of Applied Sciences Ton Due Thang UniversityHo Chi Minh CityVietnam Department of Physics Visvodaya Government Degree CollegeVenkatagiri524132India School of Mechanical Engineering Yeungnam UniversityGyeongsan33541South Korea Department of Chemistry School of Applied SciencesREVA UniversityBengaluru560064India

Due to the characteristic emission of phosphors,phosphor-converted LEDs have been employed to provide the requisite light sources for indoor plant growth in the optical agricultural ***,we prepared a series of Mn^(2+)co-doped NaSrB5 O9:Dy^(3+)phosphors via a solid-state reaction *** phosphors have significant three-band emissions at 467 nm(blue region),606 nm(orange region),and765 nm(far-red region),ascribed to the^(4)F_(9/2)-^(6)H_(15/2)and 4 F9/2-6 H13/2 transitions of the Dy^(3+)ions and the^(4)T_(1g)(G)-^(6)A_(1g)(S)spin-forbidden transition of the Mn^(2+)ions,respectively,when excited by light of 376 nm(near-UV region).The co-dopant in the host material facilitates tunable photoluminescence(PL)due to energy transfer from the Dy^(3+)ions to the Mn^(2+)*** three emission peaks from the prepared phosphors well match with the absorption spectra of the photosynthesis pigments of plants,chlorophyll and phytochrome,which can absorb blue(400-500 nm),orange-red(550-700 nm),and infrared(IR)radiation,indicating that these phosphors have potential applications in the fabrication of plant-growth *** to the PL studies,the structure of the phosphors was determined by X-ray diffraction,refined by Rietveld method and chemically quantified by X-ray photoelectron spectroscopy.

关键词： Phosphors Refinement X-ray photoelectron spectroscopy Energy transfer Plant growth LEDs Rare earths

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