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Mar 2021 • Journal of Colloid and Interface Science

Electrically conductive cotton fabric coatings developed by silica sol-gel precursors doped with surfactant-aided dispersion of vertically aligned carbon nanotubes fillers in …

Valentina Trovato, Eti Teblum, Yulia Kostikov, Andrea Pedrana, Valerio Re, Gilbert Daniel Nessim, Giuseppe Rosace

HypothesisFrom the end of the twentieth century, the growing interest in a new generation of wearable electronics with attractive application for military, medical and smart textiles fields has led to a wide investigation of chemical finishes for the production of electronic textiles (e-textiles).ExperimentsHerein, a novel method to turn insulating cotton fabrics in electrically conductive by the deposition of three-dimensional hierarchical vertically aligned carbon nanotubes (VACNT) is proposed. Two VACNT samples with different length were synthesized and then dispersed in 4-dodecylbenzenesulfonic acid combined with silica-based sol-gel precursors. The dispersed VACNT were separately compounded with a polyurethane thickener to obtain homogeneous spreadable pastes, finally coated onto cotton surfaces by the “knife-over-roll” technique.FindingsShorter VACNT-based composite showed the best electrical …

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Mar 2021 • Journal of Applied Physics

Measurements of nanomagnetic bead relaxation dynamics using planar Hall effect magnetometer

Proloy T Das, H Nhalil, M Schultz, A Grosz, L Klein

We study the magnetization dynamics of nanomagnetic beads with a diameter ranging from 80 to 250 nm in frequency and time domains using a high-resolution elliptical planar Hall effect (EPHE) sensor integrated with a fluidic channel. We find that the dynamics are well described with Cole–Cole and exponential decay models for frequency and time domains, respectively. We discuss the potential use of EPHE sensors in lab-on-a-chip applications.

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Mar 2021 • Bulletin of the American Physical Society

Imaging filamentary current flow near the metal-insulator transition in an oxide interface

Eylon Persky, Naor Vardi, Ana Monteiro, Thierry van Thiel, Hyeok Yoon, Yan-Wu Xie, Benoit Fauque, Andrea Caviglia, Harold Hwang, Kamran Behnia, Beena Kalisky

S44. 00005: Imaging filamentary current flow near the metal-insulator transition in an oxide interface*

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Mar 2021 • ChemElectroChem 8 (5), 798-811, 2021

Tunnel‐Type Sodium Manganese Oxide Cathodes for Sodium‐Ion Batteries

Munseok S Chae, Yuval Elias, Doron Aurbach

Tunnel‐type sodium manganese oxide is attracting attention as a cheap and earth‐abundant cathode material for sodium‐ion batteries, offering more stable cycling performance than other layered materials due to its special structural ordering. Developments and applications in aqueous and nonaqueous electrolyte solutions are reviewed, and problems and possible solutions are discussed in detail.

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Mar 2021 • Optical and Quantum Sensing and Precision Metrology 11700, 117003H, 2021

Quantum x-ray imaging for medical and industrial applications

Brian D Yanoff, Sharon Shwartz, Eliahu Cohen, Vasil Bogdan Neculaes, Uwe Wiedmann, Jonathan Owens, Loucas Tsakalakos

We provide an introductory overview of medical and industrial x-ray imaging applications and requirements for readers whose primary background is in quantum imaging. We discuss some opportunities for quantum X-ray imaging and related techniques such as ghost imaging to provide meaningful benefits in imaging and explain some of the key challenges that remain before practical applications can reach end users.

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Mar 2021 • Physical Chemistry Chemical Physics

Comment on ‘‘Bi-layering at ionic liquid surfaces: a sum – frequency generation vibrational spectroscopy – and molecular dynamics simulation-based study’’ by T. Iwahashi, T …

Moshe Deutsch, Olaf M. Magnussen, Julia Haddad, Diego Pontoni, Bridget M. Murphy, Benjamin M. Ocko.


Mar 2021 • Frontiers in Biological Detection: From Nanosensors to Systems XIII 11662 …, 2021

Welcome and Introduction to SPIE Conference 11662

Amos Danielli, Benjamin L Miller, Sharon M Weiss

Introduction to SPIE Photonics West BiOS conference 11662: Frontiers in Biological Detection: From Nanosensors to Systems XIII

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Mar 2021 • Journal of Neural Engineering

Cortical responses to prosthetic retinal stimulation are significantly affected by the light-adaptive state of the surrounding normal retina

Tamar Arens-Arad, Rivkah Lender, Nairouz Farah, Yossi Mandel

Objective. Restoration of central vision loss in patients with age-related macular degeneration (AMD) by implanting a retinal prosthesis is associated with an intriguing situation wherein the central prosthetic vision co-exists with natural normal vision. Of major interest are the interactions between the prosthetic and natural vision. Here we studied the effect of the light-adaptive state of the normal retina on the electrical visual evoked potentials (VEPs) arising from the retinal prosthesis. Approach. We recorded electrical VEP elicited by prosthetic retinal stimulation in wild-type rats implanted with a 1 mm photovoltaic subretinal array. Cortical responses were recorded following overnight dark adaption and compared to those recorded following bleaching of the retina by light (520 nm) at various intensities and durations. Main results. Compared to dark-adapted responses, bleaching induced a 2-fold decrease in the …

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Mar 2021 • Optica

Hypercubic cluster states in the phase-modulated quantum optical frequency comb

Xuan Zhu, Chun-Hung Chang, Carlos González-Arciniegas, Avi Pe’er, Jacob Higgins, Olivier Pfister

We propose and fully analyze the simplest technique to date (to our knowledge) for generating light-based universal quantum computing resources, namely, 2D, 3D, and n-hypercubic cluster states in general. The technique uses two standard optical components: first, a single optical parametric oscillator pumped below threshold by a monochromatic field, which generates Einstein–Podolsky–Rosen entangled states, a.k.a. two-mode squeezed states, over the quantum optical frequency comb; second, phase modulation at frequencies that are multiples of the comb spacing (via RF or optical means). The compactness of this technique paves the way to implementing quantum computing on chip using quantum nanophotonics.

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Mar 2021 • Nature Photonics

Reply to ‘Ideal solar cell efficiencies’

Jean-Francois Guillemoles, Thomas Kirchartz, David Cahen, Uwe Rau

Guillemoles et al. reply—We wrote our Comment 1 as a brief and concise guide to the Shockley–Queisser (SQ) model 2, chiefly aiming to explain how real-world solar cells (non-concentrating, single-junction) must be related to the efficiency limits that result from the SQ model. There is a need for such a Comment, especially in the context of a widened portfolio of new very efficient solar cell materials and a rapidly growing community. As obvious from the title 1, we target non-specialist readers. Such approach 3 has the risk that the resulting text is unsatisfactory for specialist readers. The author of the Correspondence on our Comment 4 is certainly such specialist reader. Thus, to reply to the Correspondence we need to leave the level at which we presented the topic in our Comment, to make clear that while there can be differences of opinion as how to explain the issue to the ‘perplexed’, what is written in our …

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Mar 2021 • Frontiers in immunology

Machine learning analysis of naïve B-cell receptor repertoires stratifies celiac disease patients and controls

Or Shemesh, Pazit Polak, Knut EA Lundin, Ludvig M Sollid, Gur Yaari

Celiac disease (CeD) is a common autoimmune disorder caused by an abnormal immune response to dietary gluten proteins. The disease has high heritability. HLA is the major susceptibility factor, and the HLA effect is mediated via presentation of deamidated gluten peptides by disease-associated HLA-DQ variants to CD4+ T cells. In addition to gluten-specific CD4+ T cells the patients have antibodies to transglutaminase 2 (autoantigen) and deamidated gluten peptides. These disease-specific antibodies recognize defined epitopes and they display common usage of specific heavy and light chains across patients. Interactions between T cells and B cells are likely central in the pathogenesis, but how the repertoires of naïve T and B cells relate to the pathogenic effector cells is unexplored. To this end, we applied machine learning classification models to naïve B cell receptor (BCR) repertoires from CeD patients and healthy controls. Strikingly, we obtained a promising classification performance with an F1 score of 85%. Clusters of heavy and light chain sequences were inferred and used as features for the model, and signatures associated with the disease were then characterized. These signatures included amino acid (AA) 3-mers with distinct bio-physiochemical characteristics and enriched V and J genes. We found that CeD-associated clusters can be identified and that common motifs can be characterized from naïve BCR repertoires. The results may indicate a genetic influence by BCR encoding genes in CeD. Analysis of naïve BCRs as presented here may become an important part of assessing the risk of individuals to develop CeD. Our …

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Mar 2021 • Elife 10, e60416, 2021

FRET-based dynamic structural biology: Challenges, perspectives and an appeal for open-science practices

Eitan Lerner, Anders Barth, Jelle Hendrix, Benjamin Ambrose, Victoria Birkedal, Scott C Blanchard, Richard Börner, Hoi Sung Chung, Thorben Cordes, Timothy D Craggs, Ashok A Deniz, Jiajie Diao, Jingyi Fei, Ruben L Gonzalez, Irina V Gopich, Taekjip Ha, Christian A Hanke, Gilad Haran, Nikos S Hatzakis, Sungchul Hohng, Seok-Cheol Hong, Thorsten Hugel, Antonino Ingargiola, Chirlmin Joo, Achillefs N Kapanidis, Harold D Kim, Ted Laurence, Nam Ki Lee, Tae-Hee Lee, Edward A Lemke, Emmanuel Margeat, Jens Michaelis, Xavier Michalet, Sua Myong, Daniel Nettels, Thomas-Otavio Peulen, Evelyn Ploetz, Yair Razvag, Nicole C Robb, Benjamin Schuler, Hamid Soleimaninejad, Chun Tang, Reza Vafabakhsh, Don C Lamb, Claus AM Seidel, Shimon Weiss

Single-molecule FRET (smFRET) has become a mainstream technique for studying biomolecular structural dynamics. The rapid and wide adoption of smFRET experiments by an ever-increasing number of groups has generated significant progress in sample preparation, measurement procedures, data analysis, algorithms and documentation. Several labs that employ smFRET approaches have joined forces to inform the smFRET community about streamlining how to perform experiments and analyze results for obtaining quantitative information on biomolecular structure and dynamics. The recent efforts include blind tests to assess the accuracy and the precision of smFRET experiments among different labs using various procedures. These multi-lab studies have led to the development of smFRET procedures and documentation, which are important when submitting entries into the archiving system for integrative structure models, PDB-Dev. This position paper describes the current ‘state of the art’ from different perspectives, points to unresolved methodological issues for quantitative structural studies, provides a set of ‘soft recommendations’ about which an emerging consensus exists, and lists openly available resources for newcomers and seasoned practitioners. To make further progress, we strongly encourage ‘open science’ practices.

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Mar 2021 • EPL (Europhysics Letters)

Quasi-two-dimensional electron gas at the oxide interfaces for topological quantum physics

A Barthelemy, N Bergeal, M Bibes, A Caviglia, R Citro, M Cuoco, A Kalaboukhov, B Kalisky, A Perroni, J Santamaria, D Stornaiuolo, M Salluzzo

The development of" fault-tolerant" quantum computers, unaffected by noise and decoherence, is one of the fundamental challenges in quantum technology. One of the approaches currently followed is the realization of" topologically protected" qubits which make use of quantum systems characterized by a degenerate ground state of composite particles, known as" non-Abelian anyons", able to encode and manipulate quantum information in a non-local manner. In this paper, we discuss the potential of quasi-two-dimensional electron gas (q2DEG) at the interface between band insulating oxides, like LaAlO 3 and SrTiO 3, as an innovative technological platform for the realization of topological quantum systems. Being characterized by a unique combination of unconventional spin-orbit coupling, magnetism, and 2D-superconductivity, these systems naturally possess most of the fundamental characteristics needed for …

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Mar 2021 • Chemistry–A European Journal

Concentration‐Dependent Self‐Assembly of an Unusually Large Hexameric Hydrogen‐Bonded Molecular Cage

Severin Merget, Lorenzo Catti, Shani Zev, Dan T Major, Nils Trapp, Konrad Tiefenbacher

The sizes of available self‐assembled hydrogen‐bond‐based supramolecular capsules and cages are rather limited. The largest systems have volumes of approximately 1400–2300 Å3. Herein, we report a large, hexameric cage based on intermolecular amide–amide dimerization. The unusual structure with openings, reminiscent of covalently linked cages, is held together by 24 hydrogen bonds. With a diameter of 2.3 nm and a cavity volume of ∼2800 Å3, the assembly is larger than any previously known capsule/cage structure relying exclusively on hydrogen bonds. The self‐assembly process in chlorinated, organic solvents was found to be strongly concentration dependent, with the monomeric form prevailing at low concentrations. Additionally, the formation of host–guest complexes with fullerenes (C60 and C70) was observed.

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Mar 2021 • Advanced Energy and Sustainability Research

Electrochemical and Thermal Behavior of Modified Li and Mn‐Rich Cathode Materials in Battery Prototypes: Impact of Pentasodium Aluminate Coating and Comprehensive Understanding …

Hadar Sclar, Sandipan Maiti, Nicole Leifer, Noam Vishkin, Miryam Fayena‐Greenstein, Meital Hen, Judith Grinblat, Michael Talianker, Nickolay Solomatin, Ortal Tiurin, Maria Tkachev, Yair Ein‐Eli, Gil Goobes, Boris Markovsky, Doron Aurbach

In continuation of the work on the stabilization of the electrochemical performance of Li and Mn‐rich LixNiyCozMnwO2 (HE‐NCM, x > 1, w > 0.5, x + y + z + w = 2) cathode materials via atomic layer deposition (ALD) surface coatings, herein, the active role of aluminum oxides‐based coatings, during prolonged cycling in battery prototypes with graphite anodes, is discussed. Notable progress in electrochemical cycling and rate performance of Na‐aluminate‐coated Li1.142Mn0.513Ni0.230Co0.115O2 cathode material is established. These coated electrodes delivered a stable discharge capacity of 145 mAh g−1 (66% retention), compared to only 118 mAh g−1 (55% retention) for the uncoated sample at a 1.0 C rate after 400 cycles. Steady average discharge potential, lower voltage hysteresis, and stable energy density profiles are the noteworthy achievements for the coated material during cycling …

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Mar 2021 • Optical and Quantum Sensing and Precision Metrology 11700, 1170024, 2021

Spectral and temporal structure of non-classical light

Sara Meir, Eliahu Cohen, Moti Fridman

We measured the temporal modes of non-classical light with sub-picosecond resolution by utilizing time-lenses and time-stretch schemes. We obtained the temporal modes by analyzing both the intensity distribution and the phase distribution of spontaneous four-wave mixing process in highly nonlinear fibers. This research may lead to identification and characterization of unknown quantum processes with lower noise than before.

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Mar 2021 • Bulletin of the American Physical Society

Complex two-mode quadratures-a generalized formalism for continuous-variable quantum optics

Leon Bello, Yoad Michael, Michael Rosenbluh, Eliahu Cohen, Avi Pe'er


Mar 2021 • Optical and Quantum Sensing and Precision Metrology 11700, 1170024, 2021

Spectral and temporal structure of non-classical light

Sara Meir, Eliahu Cohen, Moti Fridman

We measured the temporal modes of non-classical light with sub-picosecond resolution by utilizing time-lenses and time-stretch schemes. We obtained the temporal modes by analyzing both the intensity distribution and the phase distribution of spontaneous four-wave mixing process in highly nonlinear fibers. This research may lead to identification and characterization of unknown quantum processes with lower noise than before.

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Mar 2021 • Bulletin of the American Physical Society

Solving random Ising graphs with nonlinear parametric oscillators

Marcello Calvanese Strinati, Leon Bello, Emanuele Dalla Torre, Avi Pe'er

Large networks of parametric oscillators hold the promise to solve a paradigmatic NP-hard problem, namely finding the ground state of frustrated Ising models. Recent theoretical studies and experiments based on linear stability analysis showed that coherent Ising machines necessarily encounters two major obstacles: The system can either be trapped in oscillatory persistent beats, or get stuck in a wrong configuration dictated by the eigenvalues of the coupling matrix. These obstacles make networks of coupled parametric oscillator close to threshold intrinsically not an Ising solver. Here we show that for pump power sufficiently above the threshold the system can find correct Ising solutions. Our study highlights the role of nonlinearities in understanding the dynamics of coupled parametric oscillators and brings hope for their applicability as Ising solvers.

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Mar 2021 • Optical and Quantum Sensing and Precision Metrology 11700, 117000X, 2021

Photonic tests of multiplicative Bell inequalities and other bounds on nonlocal correlations

Eliahu Cohen

SPIE Digital Library Proceedings.

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Mar 2021 • Optical and Quantum Sensing and Precision Metrology 11700, 117003H, 2021

Quantum x-ray imaging for medical and industrial applications

Brian D Yanoff, Sharon Shwartz, Eliahu Cohen, Vasil Bogdan Neculaes, Uwe Wiedmann, Jonathan Owens, Loucas Tsakalakos

We provide an introductory overview of medical and industrial x-ray imaging applications and requirements for readers whose primary background is in quantum imaging. We discuss some opportunities for quantum X-ray imaging and related techniques such as ghost imaging to provide meaningful benefits in imaging and explain some of the key challenges that remain before practical applications can reach end users.

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