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Oct 2023 • ACS omega

Revealing the DNA Binding Modes of CsoR by EPR Spectroscopy

Yasmin Igbaria-Jaber, Lukas Hofmann, Lada Gevorkyan-Airapetov, Yulia Shenberger, Sharon Ruthstein

In pathogens, a unique class of metalloregulator proteins, called gene regulatory proteins, sense specific metal ions that initiate gene transcription of proteins that export metal ions from the cell, thereby preventing toxicity and cell death. CsoR is a metalloregulator protein found in various bacterial systems that “sense” Cu(I) ions with high affinity. Upon copper binding, CsoR dissociates from the DNA promoter region, resulting in initiation of gene transcription. Crystal structures of CsoR in the presence and absence of Cu(I) from various bacterial systems have been reported, suggesting either a dimeric or tetrameric structure of these helical proteins. However, structural information about the CsoR-DNA complex is missing. Here, we applied electron paramagnetic resonance (EPR) spectroscopy to follow the conformational and dynamical changes that Mycobacterium tuberculosis CsoR undergoes upon DNA binding in …

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Oct 2023 • Laser & Photonics Reviews 17 (12), 2200029, 2023

Roadmap on Label‐Free Super‐Resolution Imaging

Vasily N Astratov, Yair Ben Sahel, Yonina C Eldar, Luzhe Huang, Aydogan Ozcan, Nikolay Zheludev, Junxiang Zhao, Zachary Burns, Zhaowei Liu, Evgenii Narimanov, Neha Goswami, Gabriel Popescu, Emanuel Pfitzner, Philipp Kukura, Yi‐Teng Hsiao, Chia‐Lung Hsieh, Brian Abbey, Alberto Diaspro, Aymeric LeGratiet, Paolo Bianchini, Natan T Shaked, Bertrand Simon, Nicolas Verrier, Matthieu Debailleul, Olivier Haeberlé, Sheng Wang, Mengkun Liu, Yeran Bai, Ji‐Xin Cheng, Behjat S Kariman, Katsumasa Fujita, Moshe Sinvani, Zeev Zalevsky, Xiangping Li, Guan‐Jie Huang, Shi‐Wei Chu, Omer Tzang, Dror Hershkovitz, Ori Cheshnovsky, Mikko J Huttunen, Stefan G Stanciu, Vera N Smolyaninova, Igor I Smolyaninov, Ulf Leonhardt, Sahar Sahebdivan, Zengbo Wang, Boris Luk'yanchuk, Limin Wu, Alexey V Maslov, Boya Jin, Constantin R Simovski, Stephane Perrin, Paul Montgomery, Sylvain Lecler

Label‐free super‐resolution (LFSR) imaging relies on light‐scattering processes in nanoscale objects without a need for fluorescent (FL) staining required in super‐resolved FL microscopy. The objectives of this Roadmap are to present a comprehensive vision of the developments, the state‐of‐the‐art in this field, and to discuss the resolution boundaries and hurdles that need to be overcome to break the classical diffraction limit of the label‐free imaging. The scope of this Roadmap spans from the advanced interference detection techniques, where the diffraction‐limited lateral resolution is combined with unsurpassed axial and temporal resolution, to techniques with true lateral super‐resolution capability that are based on understanding resolution as an information science problem, on using novel structured illumination, near‐field scanning, and nonlinear optics approaches, and on designing superlenses based …

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Oct 2023 • 244th ECS Meeting (October 8-12, 2023)

Employing a Thin Artificial CEI Layer on Na3V2 (PO4)2F3-2xO2x (0 < x < 1) by Atomic Layer Deposition; Structure Stabilization and Capacity Enhancement

Sankalpita Chakrabarty, Ayan Mukherjee, Malachi Noked


Oct 2023 • Physical Chemistry of Semiconductor Materials and Interfaces XXII, PC126500Q, 2023

All-optical photoacoustic measurement of localized chirality in crystal suspensions

Gil Otis, Matan Benyamin, Yitzhak Mastai, Zeev Zalevsky

In this research we present a novel method to measure local optical dichroism in opaque crystal powder suspensions using the photoacoustic effect. Our method is based upon the laser speckle contrast technique, a novel technique to perform photoacoustic measurements that do not require contact with the sample. The main novelty of our work is the development of a simple statistical approach for measuring the chirality of crystal suspensions using the photoacoustic effect, which does not require arranging the crystals with a specific orientation on surfaces. A model chiral system was used to demonstrate our method, we have used Cobalt doped L-Histidine crystals that are photoacoustic active and established our ability to measure their optical dichroism in solution under completely random orientation.

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Oct 2023 • bioRxiv

Resolving haplotype variation and complex genetic architecture in the human immunoglobulin kappa chain locus in individuals of diverse ancestry

Eric Engelbrecht, Oscar L Rodriguez, Kaitlyn Shields, Steven Schulze, David Tieri, Uddalok Jana, Gur Yaari, William Lees, Melissa L Smith, Corey T Watson

Immunoglobulins (IGs), critical components of the human immune system, are composed of heavy and light protein chains encoded at three genomic loci. The IG Kappa (IGK) chain locus consists of two large, inverted segmental duplications. The complexity of IG loci has hindered effective use of standard high-throughput methods for characterizing genetic variation within these regions. To overcome these limitations, we leverage long-read sequencing to create haplotype-resolved IGK assemblies in an ancestrally diverse cohort (n=36), representing the first comprehensive description of IGK haplotype variation at population-scale. We identify extensive locus polymorphism, including novel single nucleotide variants (SNVs) and a common novel ~24.7 Kbp structural variant harboring a functional IGKV gene. Among 47 functional IGKV genes, we identify 141 alleles, 64 (45.4%) of which were not previously curated. We report inter-population differences in allele frequencies for 14 of the IGKV genes, including alleles unique to specific populations within this dataset. Finally, we identify haplotypes carrying signatures of gene conversion that associate with enrichment of SNVs in the IGK distal region. These data provide a critical resource of curated genomic reference information from diverse ancestries, laying a foundation for advancing our understanding of population-level genetic variation in the IGK locus.

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Oct 2023 • 244th ECS Meeting (October 8-12, 2023), 2023

G01-ALD for Thermoelectrics

Oscar van der Straten, Andrea Illiberi, Malachi Noked


Oct 2023 • Colloids and Surfaces B: Biointerfaces

Siliplant1 B-domain precipitates silica spheres, aggregates, or gel, depending on Si-precursor to peptide ratios

Vincent Otieno Ayieko, Lilian Cohen, Sabrina Diehn, Gil Goobes, Rivka Elbaum

Silica is extensively deposited by plants, however, only little is known about the molecular control over this process. Siliplant1 is the only known plant protein to precipitate biosilica. The protein contains seven repeats made of three domains. One of the domains exhibits a conserved sequence, which catalyzes silica precipitation in vitro. Here, silica was synthesized by the activity of a peptide carrying this conserved sequence. Infrared spectroscopy and thermal gravimetric analyses showed that the peptide was bound to the mineral. Scanning electron microscopy showed that silica-peptide particles of 22 ± 4 nm aggregated to spherical structures of 200 - 300 nm when the ratio of silicic acid to the peptide was below 183:1 molecules. When the ratio was about 183:1, similar particles aggregated into irregular structures, and silica gel formed at higher ratios. Solid-state NMR spectra indicated that the irregular aggregates …

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Oct 2023 • Authorea Preprints

Effect of Coil Dimensions on Dynamic Wireless Power Transfer for Electric Vehicles

Sahar Bareli, Lidor Geri, Yasha Nikulshin, Oren E Nahum, Yuval Hadas, Yosef Yeshurun, Eyal Yaniv, Shuki Wolfus

We explore the effects of various receiver coil dimensions and configurations on power transfer efficiency and cost of operation, using advanced simulation tools. We demonstrate that the spatial distribution of the magnetic field leads to a non-monotonic dependence of the coupling coefficient on coil size. Thus, an optimal coil size, where the coupling coefficient peaks, should be regarded a crucial design parameter which affects the entire system performances. The incorporation of our findings into a multi-objective optimization algorithm is also discussed.

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Oct 2023 • ACS Applied Bio Materials

Bioimaging based on Poly (ethylenimine)-Coated Carbon Dots and Gold Nanoparticles for pH Sensing and Metal Enhanced Fluorescence

Shweta Pawar, Hamootal Duadi, Moran Friedman Gohas, Yoram Cohen, Dror Fixler

When exposed to specific light wavelengths, carbon dots (CDs), which tend to be fluorescent, can emit colorful light. It provides them with a lot of adaptability for different applications including bioimaging, optoelectronics, and even environmental sensing. Poly(ethylenimine) (PEI) coated carbon dots (PEI-CDs) with a long emission wavelength were synthesized via the hydrothermal method. The resultant CDs show strong fluorescence with quantum yield up to 20.2%. The PEI-CDs exist with distinct pH-sensitive features with pH values in the range of 2–14. The optical characteristics of CDs are pH-responsive due to the presence of different amine groups on PEI, which is a functional polycationic polymer. One of the most widely employed nanoparticles for improving the fluorescence plasmonic characteristics of a nanocomposite is gold. Gold nanoparticles were coupled with PEI-CDs in this assay by using the EDC …

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Oct 2023 • Scientific Reports

Full-optical photoacoustic imaging using speckle analysis and resolution enhancement by orthogonal pump patterns projection

Viktor Vorobev, David Weidmann, Sergey Agdarov, Yafim Beiderman, Nadav Shabairou, Matan Benyamin, Florian Klämpfl, Michael Schmidt, Dmitry Gorin, Zeev Zalevsky

This paper presents an approach for achieving full optical photoacoustic imaging with enhanced resolution utilizing speckle pattern analysis. The proposed technique involves projecting patterns derived from binary masks corresponding to orthogonal functions onto the target to elicit a photoacoustic signal. The resulting signal is then recorded using a high-speed camera and analyzed using correlation analysis of the speckle motion. Our results demonstrate the feasibility of this optical approach to achieve imaging with enhanced resolution without the need for physical contact with the target, opening up new possibilities for non-invasive medical imaging and other applications.

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Oct 2023 • 244th ECS Meeting (October 8-12, 2023)

High Entropy Configuration Strategy: Boosting Kinetics, Air Stability and Suppressing Phase Transition in Co-Free O3-Layered Cathode for Sodium-Ion Batteries

Akanksha Joshi, Sankalpita Chakrabarty, Sri Harsha Akella, Arka Saha, Ayan Mukherjee, Rosy Sharma, Malachi Noked


Oct 2023 • 244th ECS Meeting (October 8-12, 2023)

Performance and Stability of Carbon-Based Cathodes in Non-Alkaline Zn-Air Batteries

Roman R Kapaev, Amit Ohayon, Masato Sonoo, Malachi Noked


Oct 2023 • Angewandte Chemie International Edition

Polymeric Carbon nitride with chirality inherited from supramolecular assemblies

Adi Azoulay, Sapir Shekef Aloni, Lidan Xing, Ayelet Tashakory, Yitzhak Mastai, Menny Shalom

The facile synthesis of chiral materials is of paramount importance for various applications. Supramolecular preorganization of monomers for thermal polymerization has been proven as an effective tool to synthesize carbon and carbon nitride‐based (CN) materials with ordered morphology and controlled properties. However, the transfer of an intrinsic chemical property, such as chirality from supramolecular assemblies to the final material after thermal condensation, was not shown. Here, we report the large‐scale synthesis of chiral CN materials capable of enantioselective recognition. To achieve this, we designed supramolecular assemblies with a chiral center that remains intact at elevated temperatures. The optimized chiral CN demonstrates an enantiomeric preference of ca. 14 %; CN electrodes were also prepared and show stereoselective interactions with enantiomeric probes in electrochemical …

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Oct 2023 • Nano Letters

Unveiling Local Optical Properties Using Nanoimaging Phase Mapping in High-Index Topological Insulator Bi2Se3 Resonant Nanostructures

Sukanta Nandi, Shany Z Cohen, Danveer Singh, Michal Poplinger, Pilkhaz Nanikashvili, Doron Naveh, Tomer Lewi

Topological insulators are materials characterized by an insulating bulk and high mobility topologically protected surface states, making them promising candidates for future optoelectronic and quantum devices. Although their electronic properties have been extensively studied, their mid-infrared (MIR) properties and prospective photonic capabilities have not been fully uncovered. Here, we use a combination of far-field and near-field nanoscale imaging and spectroscopy to study chemical vapor deposition-grown Bi2Se3 nanobeams (NBs). We extract the MIR optical constants of Bi2Se3, revealing refractive index values as high as n ∼ 6.4, and demonstrate that the NBs support Mie resonances across the MIR. Local near-field reflection phase mapping reveals domains of various phase shifts, providing information on the local optical properties of the NBs. We experimentally measure up to 2π phase-shift across the …

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Oct 2023 • Nature Nanotechnology

High-energy all-solid-state lithium batteries enabled by Co-free LiNiO2 cathodes with robust outside-in structures

Longlong Wang, Ayan Mukherjee, Chang-Yang Kuo, Sankalpita Chakrabarty, Reut Yemini, Arrelaine A Dameron, Jaime W DuMont, Sri Harsha Akella, Arka Saha, Sarah Taragin, Hagit Aviv, Doron Naveh, Daniel Sharon, Ting-Shan Chan, Hong-Ji Lin, Jyh-Fu Lee, Chien-Te Chen, Boyang Liu, Xiangwen Gao, Suddhasatwa Basu, Zhiwei Hu, Doron Aurbach, Peter G Bruce, Malachi Noked

A critical current challenge in the development of all-solid-state lithium batteries (ASSLBs) is reducing the cost of fabrication without compromising the performance. Here we report a sulfide ASSLB based on a high-energy, Co-free LiNiO2 cathode with a robust outside-in structure. This promising cathode is enabled by the high-pressure O2 synthesis and subsequent atomic layer deposition of a unique ultrathin LixAlyZnzOδ protective layer comprising a LixAlyZnzOδ surface coating region and an Al and Zn near-surface doping region. This high-quality artificial interphase enhances the structural stability and interfacial dynamics of the cathode as it mitigates the contact loss and continuous side reactions at the cathode/solid electrolyte interface. As a result, our ASSLBs exhibit a high areal capacity (4.65 mAh cm−2), a high specific cathode capacity (203 mAh g−1), superior cycling stability (92% capacity retention …

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Oct 2023 • Nano Letters

Unveiling Local Optical Properties Using Nanoimaging Phase Mapping in High-Index Topological Insulator Bi2Se3 Resonant Nanostructures

Sukanta Nandi, Shany Z Cohen, Danveer Singh, Michal Poplinger, Pilkhaz Nanikashvili, Doron Naveh, Tomer Lewi

Topological insulators are materials characterized by an insulating bulk and high mobility topologically protected surface states, making them promising candidates for future optoelectronic and quantum devices. Although their electronic properties have been extensively studied, their mid-infrared (MIR) properties and prospective photonic capabilities have not been fully uncovered. Here, we use a combination of far-field and near-field nanoscale imaging and spectroscopy to study chemical vapor deposition-grown Bi2Se3 nanobeams (NBs). We extract the MIR optical constants of Bi2Se3, revealing refractive index values as high as n ∼ 6.4, and demonstrate that the NBs support Mie resonances across the MIR. Local near-field reflection phase mapping reveals domains of various phase shifts, providing information on the local optical properties of the NBs. We experimentally measure up to 2π phase-shift across the …

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Oct 2023 • arXiv preprint arXiv:2210.02739

High energy-resolution transient ghost absorption spectroscopy

Alok Kumar Tripathi, Yishai Klein, Edward Strizhevsky, Flavio Capotondi, Dario De Angelis, Luca Giannessi, Matteo Pancaldi, Emanuele Pedersoli, Kevin C Prince, Or Sefi, Young Yong Kim, Ivan A Vartanyants, Sharon Shwartz

We demonstrate the measurement of ultrafast dynamics using ghost spectroscopy and a pump-probe approach with an optical pump and a short-wavelength radiation probe. The ghost spectroscopy approach is used to overcome the challenge of the strong intensity and spectrum fluctuations at free-electron lasers and to provide high -spectral resolution, which enables the measurement of small energy shifts in the absorption spectrum. We exploit the high resolution to explore the dynamics of the charge carrier excitations and relaxations and their impact on the photoinduced structural changes in silicon by measuring the variation of the absorption spectrum of a Si(100) membrane near the silicon L2,3 edge and the accompanying edge shifts in response to the optical illumination.

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Oct 2023 • 2023 IEEE Nanotechnology Materials and Devices Conference (NMDC), 660-660, 2023

Unconventional Formation of a Zintl Compound in Nanowire Form

Man Suk Song, Lothar Houben, Nadav Rothem, Xi Wang, Beena Kalisky, Magdalena A Załuska-Kotur, Hyeonhu Bae, Binghai Yan, Ryszard Buczko, Perla Kacman, Haim Beidenkopf, Hadas Shtrikman

Nanowires consisting of Eu 3 In 2 As 4 were grown by MBE using an unconventional method. Eu 3 In 2 P 4 and Eu 3 InEu 3 were suggested to be an example of material with new magnetic Zintl phases already 20 years ago [1]. Recently, a vast selection of newly emerging compounds, in particular compounds based on InAs with the addition of strontium, barium or europium, such as Eu 3 In 2 As 4 have been included into the Zintl family of materials and widely studied [2]. Extensively conducted research showed a large variety of unique magnetic, electronic, and topological properties both in bulk and layers of Zintl materials. Here we present the formation of a Zintl phase obtained for the first time in nanowires. The properties of these nanowires, including their composition, crystal structure and magnetic order, were thoroughly characterized. The experimental study was supported by theoretical simulations related …

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Oct 2023

How synchronized human networks escape local minima

Moti Fridman, Elad Shniderman, Yahav Avraham, Shir Shahal, Hamootal Duadi, Nir Davidson

Finding the global minimum in complex networks while avoiding local minima is challenging in many types of networks. We study the dynamics of complex human networks and observed that humans have different methods to avoid local minima than other networks. Humans can change the coupling strength between them or change their tempo. This leads to different dynamics than other networks and makes human networks more robust and better resilient against perturbations. We observed high-order vortex states, oscillation death, and amplitude death, due to the unique dynamics of the network. This research may have implications in politics, economics, pandemic control, decision-making, and predicting the dynamics of networks with artificial intelligence.

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Oct 2023 • Journal of Energy Storage

Influence of strong bromine binding complexing agent in electrolytes on the performance of hydrogen/bromine redox flow batteries

Michael Küttinger, Kobby Saadi, Théo Faverge, Nagaprasad Reddy Samala, Ilya Grinberg, David Zitoun, Peter Fischer

1-n-Hexylpyridin-1-ium bromide [C6Py]Br is investigated in this work as bromine complexing agent (BCA) in aqueous bromine electrolytes on its influence on hydrogen bromine redox flow battery (H2/Br2-RFB) performance. [C6Py]+-cations bind bromine of aqueous polybromide solutions safely in an additional fused salt phase limiting the vapor pressure of Br2. Dissolved in aqueous electrolyte solutions, however, [BCA]+ cations drastically lower PFSA membranes' conductivity in the H2/Br2-RFB. In this work the combination of the very strong bromine-binding [C6Py]+cation and an excess of bromine in the electrolyte lead to an almost complete absorption of 99.6 mol% [C6Py]+ into the fused salt within the electrolyte's operation range. In comparison to similar application of short side chain 1-ethylpyridinium bromide, adverse effects are stronger compensated by use of [C6Py]Br. Increases in membrane resistance of …

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