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Pioneering the direct large-scale laser printing of flexible“graphenic silicon”self-standing thin films as ultrahigh-performance lithium-ion battery anodes

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Carbon Energy 2024年第7期6卷 26-40页

作者： Avinash Kothuru Adam Cohen Gil Daffan yonatan juhl Fernando Patolsky School of Chemistry Faculty of Exact SciencesTel Aviv UniversityTel AvivIsrael Department of Materials Science and Engineering The Iby and Aladar Fleischman Faculty of EngineeringTel Aviv UniversityTel AvivIsrael

Recent technological advancements,such as portable electronics and electric vehicles,have created a pressing need for more efficient energy storage ***-ion batteries(LIBs)have been the preferred choice for these applications,with graphite being the standard anode material due to its ***,graphite falls short of meeting the growing demand for higher energy density,possessing a theoretical capacity that lags *** address this,researchers are actively seeking alternative materials to replace graphite in commercial *** promising avenue involves lithiumalloying materials like silicon and phosphorus,which offer high theoretical ***-silicon composites have emerged as a viable option,showing improved capacity and performance over traditional graphite or pure silicon ***,the existing methods for synthesizing these composites remain complex,energy-intensive,and costly,preventing widespread adoption.A groundbreaking approach is presented here:the use of a laser writing strategy to rapidly transform common organic carbon precursors and silicon blends into efficient“graphenic silicon”composite thin *** films exhibit exceptional structural and energy storage *** resulting three-dimensional porous composite anodes showcase impressive attributes,including ultrahigh silicon content,remarkable cyclic stability(over 4500 cycles with∼40%retention),rapid charging rates(up to 10 A g^(-1)),substantial areal capacity(>5.1 mAh cm^(-2)),and excellent gravimetric capacity(>2400 mAh g^(-1) at 0.2 A g^(-1)).This strategy marks a significant step toward the scalable production of high-performance LIB *** widely available,cost-effective precursors,the laser-printed“graphenic silicon”composites demonstrate unparalleled performance,potentially streamlining anode production while maintaining exceptional *** innovation not only paves the way for advanced LIBs but also sets a precedent for

关键词： 4D printing energy storage fast-charging laser-induced graphene lithium-ion silicon carbon composite anodes

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Turning in mid-air allows aphids that flee the plant to avoid reaching the risky ground

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Integrative Zoology 2017年第5期12卷 409-420页

作者： yonatan MERESMAN Matan BEN-ARI Moshe INBAR Department of Evolutionary and Environmental Biology University of HaifaHaifaIsrael Department of Zoology Faculty of Life SciencesTel-Aviv UniversityTel-AvivIsrael

When forced to drop from the plant,flightless arboreal insects can avoid reaching the risky ground by maneuvering their body through the *** wingless pea aphids(Acyrthosiphon pisum)are threatened by natural enemies,they often drop off their host plant while assuming a stereotypic posture that rotates them in mid-air,aligning them with their feet pointing *** position may increase their chances of re-clinging onto lower plant parts and avoid facing the dangers on the ground,although its effectiveness in realistic field conditions has not been *** performed both laboratory and outdoor experiments,in which we dropped aphids upon host plants to quantify clinging success in plants with different characteristics such as height and leaf *** aphids had twofold higher clinging rates than dead ones,indicating that clinging success is indeed affected by the active aerial-righting of dropping *** ability to cling was positively dependent on the plants’foliage cover as viewed in vertical direction from ***,we released aphids in commercial alfalfa(Medicago sativa)fields with varying plant heights and foliage cover and induced them to ***(up to 75%)of the aphids avoided reaching the ground in taller plants(65 cm),and 17%in shorter plants(21 cm),demonstrating the efficiency of the aphids’response in averting risks:both those of an approaching enemy on the plant and the plethora of new risks on the ***,even in complex field environment,the aerial-righting mechanism can substantially reduce the possible risks following escape from a predator.

关键词： Acyrthosiphon pisum aerial righting dropping response escape behavior predator avoidance

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Almost Sure Convergence of the Multiple Ergodic Average for Certain Weakly Mixing Systems

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Acta Mathematica Sinica,English Series 2018年第1期34卷 79-90页

作者： yonatan GUTMAN Wen HUANG Song SHAO Xiang Dong YE Institute of Mathematics Polish Academy of Science Wu Wen-Tsun Key Laboratory of Mathematics USTC Chinese Academy of Sciences and Department of Mathematics University of Science and Technology of China

The family of pairwise independently determined （PID） systems, i.e., those for which the independent joining is the only self joining with independent 2-marginals, is a class of systems for which the long standing open question by Rokhlin, of whether mixing implies mixing of all orders, has a positive answer. We show that in the class of weakly mixing PID one finds a positive answer for another long-standing open problem, whether the multiple ergodic averagesalmost surely converge.

关键词： Multiple ergodic average PID Rokhlin conjecture

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“Hot”electrons in metallic nanostructures—nonthermal carriers or heating?

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Light(Science & Applications) 2019年第1期8卷 368-375页

作者： yonatan Dubi yonatan Sivan Department of Chemistry and the Ilse Katz Center for nanoscale Science and Technology Ben-Gurion University of the NegevBeer ShevaIsrael School of Electrical and Computer Engineering and the Ilse Katz Center for nanoscale Science and Technology Ben-Gurion University of the NegevBeer ShevaIsrael

Understanding the interplay between illumination and the electron distribution in metallic nanostructures is a crucial step towards developing applications such as plasmonic photocatalysis for green fuels,nanoscale photodetection and *** this interplay is challenging,as it requires taking into account all channels of energy flow in the electronic ***,we develop such a theory,which is based on a coupled Boltzmann-heat equations and requires only energy conservation and basic thermodynamics,where the electron distribution,and the electron and phonon(lattice)temperatures are determined *** this theory to realistic illuminated nanoparticle systems,we find that the electron and phonon temperatures are similar,thus justifying the(classical)singletemperature *** show that while the fraction of high-energy“hot”carriers compared to thermalized carriers grows substantially with illumination intensity,it remains extremely small(on the order of 10^(-8)).Importantly,most of the absorbed illumination power goes into heating rather than generating hot carriers,thus rendering plasmonic hot carrier generation extremely *** formulation allows for the first time a unique quantitative comparison of theory and measurements of steady-state electron distributions in metallic nanostructures.

关键词： illumination theory rendering

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Unconfined Compressive Mechanical Behaviour and Mathematical Modelling of Coastal Cement Clay Modified by Fibre/Nano Material

Unconfined Compressive Mechanical Behaviour and Mathematical...

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作者： Deressa yonatan Girma 绍兴文理学院

学位级别：硕士

研究了纤维和纳米氧化镁改性滨海水泥土的无侧限抗压性能。水泥土加固是目前工程实践中常用的一种加固方法,但单独使用水泥作为加固剂存在一些不足之处,特别是在强度和刚度方面,甚至会影响环境。因此,使用附加或替代材料来改善这些效果... 详细信息

研究了纤维和纳米氧化镁改性滨海水泥土的无侧限抗压性能。水泥土加固是目前工程实践中常用的一种加固方法,但单独使用水泥作为加固剂存在一些不足之处,特别是在强度和刚度方面,甚至会影响环境。因此,使用附加或替代材料来改善这些效果。许多学者使用不同的方法来解决这些影响。纳米材料作为一种典型的改性材料在这些研究中得到了较好的利用。本文以纳米氧化镁和纤维为外加剂,研究了纳米氧化镁和纤维对滨海水泥土力学性能的改善作用。根据试验用干土的用量,取水泥、纤维和纳米氧化镁的含量百分比。试验采用30%和20%水泥掺量,纤维掺量和纳米氧化镁掺量各为1%。本研究设计的土体含水率较高,为80%。在本研究中,分别进行了纤维和纳米氧化镁对水泥土的单独改性和复合改性的无侧限抗压试验。因此,得到了不同材料的改性效果。研究还考虑了养护龄期的影响。采用7d、14d和28d的养护期作为研究样本。研究了复合改性水泥土力学性质的时间效应。最后,讨论了基于自然对数分布结果的数学模型。试验结果表明,纤维与纳米氧化镁复合使用可显著提高材料的无侧限抗压强度(UCS)。养护龄期的延长也提高了试样的强度,强度随固化时间的延长而增大。因此,随着养护龄期的增长,力学性能表现出良好的改善。

关键词：水泥土纳米氧化镁纤维无侧限抗压强度养护期数学模型

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Simplified methodology for a modular and genetically expanded protein synthesis in cell-free systems

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Synthetic and Systems Biotechnology 2019年第4期4卷 189-196页

作者： yonatan Chemla Eden Ozer Michael Shaferman Ben Zaad Rambabu Dandela Lital Alfonta Department of Life Sciences and Ilse Katz Institute for Nanoscale Science and Technology Ben-Gurion University of the NegevP.O.Box.653Beer-Sheva8410501Israel Institute of Chemical Technology-Indian Oil Odisha campusIIT Kharagpur extension centerMouza SamantpuriBhubaneswar751013OdishaIndia

Genetic code expansion,which enables the site-specific incorporation of unnatural amino acids into proteins,has emerged as a new and powerful tool for protein ***,it is mainly utilized inside living cells for a myriad of ***,the utilization of this technology in a cell-free,reconstituted platform has several advantages over living *** typical limitations to the employment of these systems are the laborious and complex nature of its preparation and ***,we describe a simplified method for the preparation of this system from Escherichia coli cells,which is specifically adapted for the expression of the components needed for cell-free genetic code ***,we propose and demonstrate a modular approach to its *** this approach,it is possible to prepare and store different extracts,harboring various translational components,and mix and match them as needed for more than four years retaining its high *** demonstrate this with the simultaneous incorporation of two different unnatural amino acids into a reporter ***,we demonstrate the advantage of cell-free systems over living cells for the incorporation ofδ-thio-boc-lysine into ubiquitin by using the methanosarcina mazei wild-type pyrrolysyl tRNACUA and tRNA-synthetase pair,which could not be achieved in a living cell.

关键词： Cell free system Genetic code expansion Thio-lysine Simplified extract preparation

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Tunable sharp and highly selective microwave-photonic band-pass filters based on stimulated Brillouin scattering

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Photonics Research 2014年第4期2卷 18-25页

作者： yonatan Stern Kun Zhong Thomas Schneider Ru Zhang Yossef Ben-Ezra Moshe Tur Avi Zadok Faculty of Engineering Bar-Ilan UniversityRamat-Gan 5290002Israel Beijing University of Post and Telecommunications Beijing 100876China Institut für Hochfrequenztechnik Hochschule für TelekommunikationD-04277 LeipzigGermany Faculty of Engineering Holon Institute of Technology52 Golomb St.Holon 5810201Israel School of Electrical Engineering Faculty of EngineeringTel-Aviv UniversityTel-Aviv 6997801Israel

Stimulated Brillouin scattering(SBS)in optical fibers has long been used in frequency-selective optical signal processing,including in the realization of microwave-photonic(MWP)*** this work,we report a significant enhancement in the selectivity of SBS-based MWP *** having a single passband of 250 MHz–1 GHz bandwidth are demonstrated,with selectivity of up to 44 *** selectivity of the filters is better than that of the corresponding previous arrangements by about 15 *** shape factor of the filters,defined as the ratio between their−20 dB bandwidth and their−3 dB bandwidth,is between 1.35 and *** central transmission frequency,bandwidth,and spectral shape of the passband are all independently *** enhancement is based on two advances,compared with previous demonstrations of tunable SBS-basedMWPfilters:(a)the polarization attributes of SBS in standard,weakly birefringent fibers are used to discriminate between in-band and out-of-band components and(b)a sharp and uniform power spectral density of the SBS pump waves is synthesized through external modulation of an optical carrier by broadband,frequency-swept *** signal-to-noise ratio of filtered radio-frequency waveforms and the linear dynamic range of the filters are estimated analytically and quantified ***,a figure of merit for the performance of the filters is proposed and *** filters are applicable to radio-over-fiber transmission systems.

关键词： filters scattering polarization

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Generalized laws of refraction and reflection at interfaces between different photonic artificial gauge fields

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Light(Science & Applications) 2020年第1期9卷 45-55页

作者： Moshe-Ishay Cohen Christina Jörg Yaakov Lumer yonatan Plotnik Erik H.Waller Julian Schulz Georg von Freymann Mordechai Segev Physics Department Technion-Israel Institute of TechnologyHaifa 32000Israel Solid State Institute Technion-Israel Institute of TechnologyHaifa 32000Israel Physics Department and Research Center OPTIMAS TU Kaiserslautern67663 KaiserslauternGermany Department of Physics The Pennsylvania State UniversityState CollegePA 16802USA Fraunhofer Institute for Industrial Mathematics ITWM 67663 KaiserslauternGermany

Artificial gauge fields the control over the dynamics of uncharged particles by engineering the potential landscape such that the particles behave as if effective external fields are acting on *** years have witnessed a growing interest in artificial gauge fields generated either by the geometry or by time-dependent modulation,as they have been enablers of topological phenomena and synthetic dimensions in many physical settings,e.g.,photonics,cold atoms,and acoustic ***,we formulate and experimentally demonstrate the generalized laws of refraction and reflection at an interface between two regions with different artificial gauge *** use the symmetries in the system to obtain the generalized Snell law for such a gauge interface and solve for reflection and *** identify total internal reflection(TIR)and complete transmission and demonstrate the concept in *** addition,we calculate the artificial magnetic flux at the interface of two regions with different artificial gauge fields and present a method to concatenate several gauge *** an example,we propose a scheme to make a gauge imaging system-a device that can reconstruct(image)the shape of an arbitrary wavepacket launched from a certain position to a predesigned location.

关键词： gauge refraction interface

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Atrial fibrillation and CHADS2 score as mortality predictors in young versus elderly patients undergoing coronary angiography

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Journal of Geriatric Cardiology 2017年第9期14卷 582-586页

作者： Nicholay Teodorovich~ Michael Sraia Swissa yonatan Kogan Gera Gandelman Michael Jonas Jacob George Moshe Swissa Kaplan Medical Center Rehovot and the Hebrew University of Jerusalem Jerusalem lsrael

Initially developed to predict stroke probability in patientswith atrial fibrillation （AF）,t1~1 CHADS2 and CHA2DS2VASCscores are used to predict different outcomes in cardiac pa-tients in both acute and chronic conditions. Thescores were also demonstrated to correlate with mortal-ity. AF also has been associated with mortality indifferent groups of patients, including elderly.

关键词： CHADS2 score Coronary angiography Mortality The elderly

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Echo is the preferred modality for hemodynamic monitoring in the cardiac intensive care unit

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World Journal of Cardiovascular Diseases 2012年第3期2卷 165-167页

作者： Hillel A. Steiner yonatan Hasin Division of Cardiovascular Medicine Boruch Padeh Medical Center Lower Galilee Israel

The PAC has enabled major advances in understanding cardiac hemodynamics and pathophysiology. However its clinical utility is limited by data interpretation and serious complications. Echocardiography provides a useful alternative for hemodynamic assessment as well as identification of important concomitant findings. The combination of echocardiography with insertion of a central venous pressure catheter may be the optimal combination for hemodynamic monitoring.

关键词： Hemodynamics Pulmonary Artery Catheter Echocardiography

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