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Mar 2023 • Energy Technology

Influence of the Halogen in Argyrodite Electrolytes on the Electrochemical Performance of All‐Solid‐State Lithium Batteries

Longlong Wang, Guy Rahamim, Kirankumar Vudutta, Nicole Leifer, Ran Elazari, Ilan Behar, Malachi Noked, David Zitoun

All‐solid‐state lithium batteries (ASSLBs) are considered as an alternative solution to lithium‐ion batteries, because of their safety and high theoretical energy density. Argyrodite‐based solid‐electrolytes (SEs), Li6PS5X (X = Cl, Cl0.5Br0.5 or Br), are promising candidates for ASSLBs. Most of the previous reports have used Li6PS5Cl as the default SE composition. Here, the electrochemical behavior of three different argyrodites with Cl− or Br−, or both, as the halogen is systematically studied. Using LiNi0.6Co0.2Mn0.2O2 as a model cathode, the behavior of these SEs in ASSLB cells is also studied. SEs containing Br show higher near‐room‐temperature ionic conductivity (>2 mS cm−1) and the critical current density (≥1 mA cm−2) during Li plating/stripping, and are stable up to 5 V versus Li/Li+. Li6PS5Br gives the best electrochemical performance in terms of C‐rate and long‐term cycling among the three …

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Mar 2023 • Physical Review Research

Majorana-Weyl cones in ferroelectric superconductors

Hennadii Yerzhakov, Roni Ilan, Efrat Shimshoni, Jonathan Ruhman

Topological superconductors are predicted to exhibit outstanding phenomena, including non-Abelian anyon excitations, heat-carrying edge states, and topological nodes in the Bogoliubov spectra. Nonetheless, and despite major experimental efforts, we are still lacking unambiguous signatures of such exotic phenomena. In this context, the recent discovery of coexisting superconductivity and ferroelectricity in lightly doped and ultraclean SrTiO 3 opens new opportunities. Indeed, a promising route to engineer topological superconductivity is the combination of strong spin-orbit coupling and inversion-symmetry breaking. Here we study a three-dimensional parabolic band minimum with Rashba spin-orbit coupling, whose axis is aligned by the direction of a ferroelectric moment. We show that all of the aforementioned phenomena naturally emerge in this model when a magnetic field is applied. Above a critical Zeeman …

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Mar 2023 • AI and Optical Data Sciences IV, PC1243805, 2023

Optical deep learning with nonlinear multimode signals

Yuval Tamir, Hamootal Duadi, Moti Fridman

A deep learning network requires high-performance computer systems for solving complex problems with millions of parameters. In our lab, we develop a fully optical machine learning system that is based on the nonlinear four wave mixing process in multimode fibers. We exploit the optical nonlinear interactions between waves for developing a deep learning system faster than electronic based systems. finally, we resort to quantum light for realizing quantum deep learning system, which can bring the deep learning techniques to the quantum field. In this talk, we will present details of our novel system and discuss our preliminary results.

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Mar 2023 • Journal of Energy Storage

Ultralow platinum loading for redox-flow battery by electrospinning the electrocatalyst and the ionomer in core-shell fibers

Kobby Saadi, Xiaozong Fan, Samuel S Hardisty, Peter Pintauro, David Zitoun

Hydrogen Bromine Redox Flow Batteries (HBRFB) are promising candidates for large scale energy storage, having an excellent balance of system, inexpensive and abundant electrolytes, high power density and near zero kinetic limitations. However, they suffer from corrosion of the hydrogen electrode due to bromine species crossover, which requires a high loading of precious group metal (PGM) electrocatalyst. Herein, a standard catalyst has been used in an electrospun (ES) fiber mat electrode, allowing for a significant (six-fold) reduction in platinum loading from 0.3 mgPt/cm2 down to 0.05 mgPt/cm2. At this very low loading, the electrospun electrode attained an impressive specific power of 11.5 W/mgPt, and exhibited excellent durability, with constant power output for 140 charge/discharge cycles. The excellent performance of the electrospun hydrogen electrode is attribute to its unique core-shell nanofiber …

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Mar 2023 • Physical Review A

Coherence and realism in the Aharonov-Bohm effect

Ismael L Paiva, Pedro R Dieguez, Renato M Angelo, Eliahu Cohen

The Aharonov-Bohm effect is a fundamental topological phenomenon with a wide range of applications. It consists of a charge encircling a region with a magnetic flux in a superposition of wave packets having their relative phase affected by the flux. In this work we analyze this effect using an entropic measure known as realism, originally introduced as a quantifier of a system's degree of reality and mathematically related to notions of global and local quantum coherence. More precisely, we look for observables that lead to gauge-invariant realism associated with the charge before it completes its loop. We find that the realism of these operators has a sudden change when the line connecting the center of both wave packets crosses the solenoid. Moreover, we consider the case of a quantized magnetic-field source, pointing out similarities and differences between the two cases. Finally, we discuss some …

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Mar 2023 • Cellular and Molecular Gastroenterology and Hepatology

High-Resolution Genomic Profiling of Liver Cancer Links Etiology With Mutation and Epigenetic Signatures

Shira Perez, Anat Lavi-Itzkovitz, Moriah Gidoni, Tom Domovitz, Roba Dabour, Ishant Khurana, Ateret Davidovich, Ana Tobar, Alejandro Livoff, Evgeny Solomonov, Yaakov Maman, Assam El-Osta, Yishan Tsai, Ming-Lung Yu, Salomon M Stemmer, Izhak Haviv, Gur Yaari, Meital Gal-Tanamy

BackgroundHepatocellular carcinoma (HCC) is a model of diverse spectrum of cancers, since it is induced by well-known etiologies, mainly Hepatitis C virus (HCV) and Hepatitis B virus (HBV). Here we aimed to identify HCV-specific mutational signature and explored the link between the HCV-related regional variation in mutations rates and HCV-induced alterations in genome-wide chromatin organization.MethodsTo identify an HCV-specific mutational signature in HCC, we performed high-resolution targeted sequencing to detect passenger mutations on 64 HCC samples from three etiology groups – HBV, HCV, or other. To explore the link between genomic signature and genome-wide chromatin organization we performed ChIP-seq for the transcriptionally permissive H3K4me3, H3K9ac and suppressive H3K9me3 modifications following HCV infection.ResultsRegional variation in mutations rates analysis …

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Mar 2023 • The Journal of Physical Chemistry Letters

Excitation Intensity-Dependent Quantum Yield of Semiconductor Nanocrystals

Subhabrata Ghosh, Ulrich Ross, Anna M Chizhik, Yung Kuo, Byeong Guk Jeong, Wan Ki Bae, Kyoungwon Park, Jack Li, Dan Oron, Shimon Weiss, Jörg Enderlein, Alexey I Chizhik

One of the key phenomena that determine the fluorescence of nanocrystals is the nonradiative Auger-Meitner recombination of excitons. This nonradiative rate affects the nanocrystals’ fluorescence intensity, excited state lifetime, and quantum yield. Whereas most of the above properties can be directly measured, the quantum yield is the most difficult to assess. Here we place semiconductor nanocrystals inside a tunable plasmonic nanocavity with subwavelength spacing and modulate their radiative de-excitation rate by changing the cavity size. This allows us to determine absolute values of their fluorescence quantum yield under specific excitation conditions. Moreover, as expected considering the enhanced Auger-Meitner rate for higher multiple excited states, increasing the excitation rate reduces the quantum yield of the nanocrystals.

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Mar 2023

Nonaromatic benzocorroles

Łukasz Kielesiński, Francesco Summa, Jeanet Conradie, Hilah Honig, Ariel Friedman, Gugliemo Monaco, Lior Elbaz, Abhik Ghosh, Daniel Gryko

Introduced here are new hybrid benzocorrole ligands, displaying both the cavity size of corroles and the dianionic character of porphyrins. Nonaromatic and yet sporting deceptively porphyrin-like optical spectra, they are readily accessible via a simple three-step synthetic protocol.

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Mar 2023 • Energy Technology

Influence of the Halogen in Argyrodite Electrolytes on the Electrochemical Performance of All‐Solid‐State Lithium Batteries

Longlong Wang, Guy Rahamim, Kirankumar Vudutta, Nicole Leifer, Ran Elazari, Ilan Behar, Malachi Noked, David Zitoun

All‐solid‐state lithium batteries (ASSLBs) are considered as an alternative solution to lithium‐ion batteries, because of their safety and high theoretical energy density. Argyrodite‐based solid‐electrolytes (SEs), Li6PS5X (X = Cl, Cl0.5Br0.5 or Br), are promising candidates for ASSLBs. Most of the previous reports have used Li6PS5Cl as the default SE composition. Here, the electrochemical behavior of three different argyrodites with Cl− or Br−, or both, as the halogen is systematically studied. Using LiNi0.6Co0.2Mn0.2O2 as a model cathode, the behavior of these SEs in ASSLB cells is also studied. SEs containing Br show higher near‐room‐temperature ionic conductivity (>2 mS cm−1) and the critical current density (≥1 mA cm−2) during Li plating/stripping, and are stable up to 5 V versus Li/Li+. Li6PS5Br gives the best electrochemical performance in terms of C‐rate and long‐term cycling among the three …

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Mar 2023 • 2023 Optical Fiber Communications Conference and Exhibition (OFC), 1-3, 2023

Incoherent Fiber-based Optical Neuromorphic Computing Circuit

Maya Yevnin, Alon Harel, Or Arbel-Arenfrid, Zeev Zalevsky, Eyal Cohen

We present novel photonic neuromorphic computing scheme working with incoherent light while capable implementing negative weighting for the neural network and obtaining reliable/accurate computing of the linear multiply-accumulate function necessary for neural networks applications.

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Mar 2023 • Optics Express

Persistent dynamics in coupled non-degenerate parametric oscillators: pump saturation prevents mode competition

Shai Ben-Ami, Igal Aharonovich, Avi Pe’er

The coherent dynamics in networks of coupled oscillators is of great interest in wave-physics since the coupling produces various dynamical effects, such as coherent energy exchange (beats) between the oscillators. However, it is common wisdom that these coherent dynamics are transients that quickly decay in active oscillators (e.g. lasers) since pump saturation causes mode competition that results, for homogeneous gain, in the prevalence of the single winning mode. We observe that pump saturation in coupled parametric oscillators counter-intuitively encourages the multi-mode dynamics of beating and indefinitely preserves it, despite the existence of mode competition. We explore in detail the coherent dynamics of a pair of coupled parametric oscillators with a shared pump and arbitrary coupling in a radio frequency (RF) experiment, as well as in simulation. Specifically, we realize two parametric oscillators as …

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Mar 2023 • PLoS Genetics

Identification of exceptionally potent adenosine deaminases RNA editors from high body temperature organisms

Adi Avram-Shperling, Eli Kopel, Itamar Twersky, Orshay Gabay, Amit Ben-David, Sarit Karako-Lampert, Joshua JC Rosenthal, Erez Y Levanon, Eli Eisenberg, Shay Ben-Aroya

The most abundant form of RNA editing in metazoa is the deamination of adenosines into inosines (A-to-I), catalyzed by ADAR enzymes. Inosines are read as guanosines by the translation machinery, and thus A-to-I may lead to protein recoding. The ability of ADARs to recode at the mRNA level makes them attractive therapeutic tools. Several approaches for Site-Directed RNA Editing (SDRE) are currently under development. A major challenge in this field is achieving high on-target editing efficiency, and thus it is of much interest to identify highly potent ADARs. To address this, we used the baker yeast Saccharomyces cerevisiae as an editing-naïve system. We exogenously expressed a range of heterologous ADARs and identified the hummingbird and primarily mallard-duck ADARs, which evolved at 40–42°C, as two exceptionally potent editors. ADARs bind to double-stranded RNA structures (dsRNAs), which in turn are temperature sensitive. Our results indicate that species evolved to live with higher core body temperatures have developed ADAR enzymes that target weaker dsRNA structures and would therefore be more effective than other ADARs. Further studies may use this approach to isolate additional ADARs with an editing profile of choice to meet specific requirements, thus broadening the applicability of SDRE.

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Mar 2023 • Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XX …, 2023

Bioimaging, pH sensing, and fluorescence lifetime imaging microscopy using polyethyleneimine coated carbon dots and gold nanoparticles

Shweta Pawar, Hamootal Duadi, Dror Fixler

The unique fluorescent nanomaterials known as carbon dots (CDs) are highly resistant to photobleaching, have low toxicity, and are well soluble in water. Polyethyleneimine (PEI) coated CDs are a novel fluorophore with good biocompatibility and pH sensing ability. Here, p-phenylenediamine (p-PD) is used as a carbon source and hyperbranched PEI is used as a surface passivation agent in a simple, one-step hydrothermal synthesis process. The CDs optical characteristics are pH-responsive due to the presence of different amine groups on PEI, which is functional polycationic polymer. The limits of techniques based on fluorescence intensity can be overcome by fluorescent lifetime imaging microscopy (FLIM), a very sensitive method for detecting a microenvironment. In this study, FLIM was used to measure pH with pH-sensitive CDs. These molecules are nontoxic to the cells, and the positively charged CDs have …

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Mar 2023 • arXiv preprint arXiv:2303.04787

Single-pair measurement of the Bell parameter

Salvatore Virzì, Enrico Rebufello, Francesco Atzori, Alessio Avella, Fabrizio Piacentini, Rudi Lussana, Iris Cusini, Francesca Madonini, Federica Villa, Marco Gramegna, Eliahu Cohen, Ivo Pietro Degiovanni, Marco Genovese

Bell inequalities are one of the cornerstones of quantum foundations, and fundamental tools for quantum technologies. Recently, the scientific community worldwide has put a lot of effort towards them, which culminated with loophole-free experiments. Nonetheless, none of the experimental tests so far was able to extract information on the full inequality from each entangled pair, since the wave function collapse forbids performing, on the same quantum state, all the measurements needed for evaluating the entire Bell parameter. We present here the first single-pair Bell inequality test, able to obtain a Bell parameter value for every entangled pair detected. This is made possible by exploiting sequential weak measurements, allowing to measure non-commuting observables in sequence on the same state, on each entangled particle. Such an approach not only grants unprecedented measurement capability, but also removes the need to choose between different measurement bases, intrinsically eliminating the freedom-of-choice loophole and stretching the concept of counterfactual-definiteness (since it allows measuring in the otherwise not-chosen bases). We also demonstrate how, after the Bell parameter measurement, the pair under test still presents a noteworthy amount of entanglement, providing evidence of the absence of (complete) wave function collapse and allowing to exploit this quantum resource for further protocols.

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Mar 2023 • Quantum Sensing, Imaging, and Precision Metrology, PC1244715, 2023

Temporal SU (1, 1) interferometer

Sara Meir, Eliahu Cohen, Moti Fridman

Quantum interferometers are able to improve the sensitivity of classical interferometers beyond the shot-noise limit. This is done by employing squeezed states of light and destructive interference of the noise in the system. We developed a quantum SU(1,1) interferometer in the time domain. Our nonlinear quantum interferometer creates interference of the input signals at different times and frequencies. We can control the time and frequency differences for investigating the full temporal and spectral structure of the signal. This quantum interferometer can be utilized for sensing ultrafast phase changes, quantum imaging, temporal mode encoding, and studying the temporal structure of entangled photons.

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Mar 2023 • Current Opinion in Electrochemistry, 101285, 2023

Developing Highly Solvating Electrolyte Solutions for Lithium-Sulfur Batteries

Mengxue He, Kenneth Ikechukwu Ozoemena, Doron Aurbach, Quanquan Pang

The limited polysulfide solubility and the resulted poor kinetics in conventionally preferred electrolyte solutions severely limit the energy density of lithium-sulfur (Li-S) battery under practically lean-electrolyte conditions. Recently, highly solvating electrolyte solutions (HSEs) have been proposed to tackle the challenge because of their high polysulfides solubility. Despite the promised high capacity under lean-electrolyte conditions, the sulfur reaction pathways, the kinetics and the reactivity with lithium remain the major questions regarding this path. This Opinion is positioned to summarize the recent progress on developing HSEs for Li-S battery, aiming to call for attention from the community. We also offer our opinions on whether HSEs are promising and how to improve them for future Li-S battery. We anticipate that the electrolytes strategy that promises high-capacity/high energy Li-S batteries by using HSEs should …

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Mar 2023 • Frontiers in Biological Detection: From Nanosensors to Systems XV, PC1239704, 2023

Improving the sensitivity of fluorescence-based immunoassays by time-resolved and spatial-resolved measurements (Conference Presentation)

Ran Kremer, Shira Roth, Avital Bross, Yair Noam, Amos Danielli

In fluorescence-based biosensing applications, to increase optical detection sensitivity, time-resolved measurements are extensively used. Magnetic modulation biosensing (MMB) is a novel, fast, and sensitive detection technology for various applications. While this technology provides high sensitivity detection of biomarkers, to date, only the time resolved signal was analyzed. Here, we use for the first time both time-resolved and spatial-resolved measurements and show that this combination drastically improves the sensitivity of an MMB-based assay.

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Mar 2023 • Nature Communications

B cell class switch recombination is regulated by DYRK1A through MSH6 phosphorylation

Liat Stoler-Barak, Ethan Harris, Ayelet Peres, Hadas Hezroni, Mirela Kuka, Pietro Di Lucia, Amalie Grenov, Neta Gurwicz, Meital Kupervaser, Bon Ham Yip, Matteo Iannacone, Gur Yaari, John D Crispino, Ziv Shulman

Protection from viral infections depends on immunoglobulin isotype switching, which endows antibodies with effector functions. Here, we find that the protein kinase DYRK1A is essential for B cell-mediated protection from viral infection and effective vaccination through regulation of class switch recombination (CSR). Dyrk1a-deficient B cells are impaired in CSR activity in vivo and in vitro. Phosphoproteomic screens and kinase-activity assays identify MSH6, a DNA mismatch repair protein, as a direct substrate for DYRK1A, and deletion of a single phosphorylation site impaired CSR. After CSR and germinal center (GC) seeding, DYRK1A is required for attenuation of B cell proliferation. These findings demonstrate DYRK1A-mediated biological mechanisms of B cell immune responses that may be used for therapeutic manipulation in antibody-mediated autoimmunity.

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Mar 2023 • Proceedings Volume PC12432, High Contrast Metastructures XII

Temperature Invariant Metasurfaces

Tomer Lewi Shany Cohen, Sukanta Nandi, Danveer Singh


Mar 2023 • High Contrast Metastructures XII, PC124320D, 2023

Deep subwavelength light localization in ultra-high index topological insulator nanostructures

Tomer Lewi

In nanophotonic, small mode volumes, narrow resonance linewidths and field enhancements, fundamentally scales with refractive index values and are key for many implementations involving light-matter interactions. Topological insulators (TI) are a class of insulating materials that host topologically protected surface states, some of which exhibit very high permittivity values. In this talk, I will discuss our latest results on Bi2Te3 and Bi2Se3 TI nanostructures. Using polarized far-field and near field nanospectroscopy we reveal that Bi2Se3 nanobeams exhibit mid-infrared resonant modes with 2π phase shifts across the resonance. We further demonstrate that Bi2Te3 metasurfaces exhibit deep subwavelength resonant modes utilizing their record high index value peaking at n~11.

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Mar 2023 • Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XX …, 2023

Imaging the rotational mobility of a fluorophore by frequency domain time-resolved fluorescence anisotropy

Gilad Yahav, Shweta Pawar, Yitzchak Weber, Bar Atuar, Hamootal Duadi, Dror Fixler

Although single point time-resolved fluorescence anisotropy (FA) measurements are well established and routinely used for various applications in many laboratories, only a few reports described their extension into two-dimensional (2D) time-resolved FA imaging (TR-FAIM). The ability to perform TR-FAIM can offer cellular imaging based on the rotational correlation time (θ) that depends on the viscosity and dynamic properties of the tissues. We extended existing frequency domain (FD) fluorescence lifetime (FLT) imaging microscopy (FLIM) to FD TR-FAIM, which produces visual maps of θ. The proof of concept of the FD TR-FAIM was validated on 7 fluorescein solutions with increasing viscosities (achieved by increasing glycerol concentration between 0-80%). The studies were performed using images of θ as well as by characterizing the peak (mode) and the full width half maximum (FWHM) of its histograms (of …

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