Edge channels of broken-symmetry quantum Hall states in graphene visualized by atomic force microscopy

Quantum Hall edge states, topologically protected states providing ‘runways’ for charge carries, are visualized in graphene by atomic force microscopy.

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Latest Research articles

  • Homogeneous earth-abundant metal catalysis based on well-defined metal complexes is of interest for organic synthesis, but typically employs expensive catalysts, air sensitive or synthetically challenging chemicals. Here, the authors report an efficient and regio-selective catalytic system for hydroboration of vinylarenes and organic nitriles with HBPin, using commercially available CoI2 and KOtBu under ligand-free conditions.

    • Chuhan Li
    • Shuo Song
    • Xiaoming Wang
    Article Open Access
  • Allylic amines are versatile building blocks in organic synthesis and exist in bioactive compounds, but efficient catalytic systems for hydroaminoalkylation of alkynes are needed. Here, the authors report a late transition metal‐catalyzed hydroaminoalkylation of alkynes with N‐sulfonyl amines, providing a series of allylic amines in up to 94% yield.

    • Wei-Wei Yao
    • Ran Li
    • Mengchun Ye
    Article Open Access
  • Active coacervate droplets are droplets coupled to a chemical reaction that maintains them out of equilibrium, which can be used to drive active processes, but coacervates are still subject to passive processes that compete with or mask growth. Here, the authors present a nucleotide-based model for active coacervate droplets that form and grow by fuel-driven synthesis of ATP, and, importantly, do not undergo Ostwald ripening.

    • Karina K. Nakashima
    • Merlijn H. I. van Haren
    • Evan Spruijt
    Article Open Access
  • Quantification of Li ions in local area is key to understand the degradation of Li ion batteries. Here the authors report Li compositional gradient evolution in the cathode after charge-discharge cycles using a complementary study via atom probe tomography and scanning transmission electron microscopy.

    • Byeong-Gyu Chae
    • Seong Yong Park
    • Woo Sung Jeon
    Article Open Access

Subjects within Physical sciences

Subjects within Earth and environmental sciences

  • In most mammals, imprinted genes contain epigenetic marks that differ in each parental genome and control their parent-of-origin-specific expression. Here, the authors map imprinted genes in mouse preimplantation embryos and find that imprinted gene expression in blastocysts is mainly dependent on Polycomb-mediated H3K27me3-associated gene silencing.

    • Laura Santini
    • Florian Halbritter
    • Martin Leeb
    Article Open Access
  • Bacterial microcompartments (BMCs) are organelles consisting of a protein shell in which certain metabolic reactions take place separated from the cytoplasm. Here, Sutter et al. present a comprehensive catalog of BMC loci, substantially expanding the number of known BMCs and describing distinct types and compartmentalized reactions.

    • Markus Sutter
    • Matthew R. Melnicki
    • Cheryl A. Kerfeld
    Article Open Access
  • Effective chemotherapies against tuberculosis must kill the pathogen’s intracellular population. Here, Santucci et al. show that bacterial localisation within human macrophages impact pyrazinamide (PZA) accumulation and efficacy, and that combination with a second antibiotic (bedaquiline) enhances PZA accumulation via a host-dependent process.

    • Pierre Santucci
    • Daniel J. Greenwood
    • Maximiliano G. Gutierrez
    Article Open Access
  • Many proteins exist in various proteoforms but detecting these variants by bottom-up proteomics remains difficult. Here, the authors present a computational approach based on peptide correlation analysis to identify and characterize proteoforms from bottom-up proteomics data.

    • Isabell Bludau
    • Max Frank
    • Ruedi Aebersold
    Article Open Access

Subjects within Biological sciences

Subjects within Health sciences

Subjects within Scientific community and society

  • The longevity of a lithium-ion battery is limited by cathode degradation. Combining atom probe tomography and scanning transmission electron microscopy reveals that the degradation results from atomic-scale irreversible structural changes once lithium leaves the cathode during charging, thereby inhibiting lithium intercalation back into the cathode as the battery discharges. This information unveils possible routes for improving the lifetime of lithium-ion batteries.

    • Baptiste Gault
    • Jonathan D. Poplawsky
    Comment Open Access
  • While genomic instability is a hallmark of cancer, its genetic vulnerabilities remain poorly understood. Identifying strategies that exploit genomic instability to selectively target cancer cells is a central challenge in cancer biology with major implications for anti-cancer drug development.

    • Craig M. Bielski
    • Barry S. Taylor
    Comment Open Access
  • The fast-growing interest for two-dimensional (2D) nanomaterials is undermined by their natural restacking tendency, which severely limits their practical application. Novel porous heterostructures that coordinate 2D nanosheets with monolayered mesoporous scaffolds offer an opportunity to greatly expand the library of advanced materials suitable for electrochemical energy storage technologies.

    • Jie Wang
    • Victor Malgras
    • Yusuke Yamauchi
    Comment Open Access
  • Water ice exists in hugely different environments, artificially or naturally occurring ones across the universe. The phase diagram of crystalline phases of ice is still under construction: a high-pressure phase, ice XIX, has just been reported but its structure remains ambiguous.

    • Thomas C. Hansen
    Comment Open Access
  • Proteins and peptides are amongst the most widely used research reagents but often their quality is inadequate and can result in poor data reproducibility. Here we propose a simple set of guidelines that, when correctly applied to protein reagents should provide more reliable experimental data.

    • Ario de Marco
    • Nick Berrow
    • Bertrand Raynal
    Comment Open Access
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