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Volume 19 Issue 8, August 2020

Volume 19 Issue 8

Dirac cones in 2D π-conjugated polymers

Optimized Ullmann coupling reaction of heterotriangulene precursors allows the synthesis of two-dimensional π-conjugated polymers, with ordered domains larger than 100 × 100 nm2 showing both Dirac cones and flat bands in their electronic structure.

See Galeotti et al. and Jing and Heine

Image: Giorgio Contini. Cover Design: Thomas Wilson

Editorial

  • Editorial |

    Within a few weeks of the novel coronavirus genome sequence being published, numerous therapies and vaccines have entered clinical trials with a few showing great promise in alleviating symptoms and accelerating recovery.

Comment

  • Comment |

    Consensus among experts is that only an effective COVID-19 vaccine will end the pandemic. This Comment focuses on how this pandemic has accelerated the development of vaccine platforms distinct from classical vaccines; these novel platforms may also increase the response time when new viruses emerge in the future.

    • Debby van Riel
    • Emmie de Wit
  • Comment |

    The COVID-19 pandemic has reignited efforts to develop materials science innovations aimed at stopping viral infections. One of the greatest opportunities lies in developing broad-spectrum antiviral technologies that work against many viruses, which could be the key to thwarting outbreaks in the future.

    • Nam Joon Cho
    • Jeffrey S. Glenn
  • Comment |

    The restoration of fire-damaged historical monuments entails a wide range of scientific questions. Taking as a starting point the case of Notre-Dame de Paris, this Comment defines the materials science challenges of post-fire restoration, and also briefly outlines the issues of structural integrity, fire safety and preservation ethics.

    • Ylenia Praticò
    • John Ochsendorf
    • Robert J. Flatt

Q&A

  • Q&A |

    Aline Magnien, director of the Historical Monuments Research Laboratory in Champs-sur-Marne in France, talks to Nature Materials about their work in materials damage assessment serving for the restoration of Notre-Dame de Paris.

    • Xin Li

News & Views

  • News & Views |

    First-principles calculations predicted electronic topological properties for 2D honeycomb–kagome polymers, which have been now confirmed experimentally thanks to improvements in on-surface synthesis.

    • Yu Jing
    • Thomas Heine
  • News & Views |

    Flat sub-bands induced by moiré patterns and correlation effects are demonstrated in a twisted bilayer of the transition metal dichalcogenide WSe2 through a series of transport experiments.

    • Junwei Liu
  • News & Views |

    Nanoformulations of cabotegravir prodrugs have been developed to prolong the pharmacokinetics of the antiretroviral agent. They can be present in the plasma of mice and non-human primates for a year following a single injection.

    • Vicente Soriano
    • Pablo Barreiro
    • Carmen de Mendoza
  • News & Views |

    Scanning atomic electron tomography measurements reveal the 3D local structure around single dopant atoms in 2D transition metal dichalcogenides, providing essential information to investigate and predict their electronic properties.

    • Angus I. Kirkland

Perspectives

  • Perspective |

    Semimetal photodetectors provide high-speed and broadband operation but suffer from serious drawbacks such as high dark currents. This Perspective discusses the opportunities offered by topological effects to overcome these issues and improve their performance.

    • Jing Liu
    • Fengnian Xia
    • Dong Sun

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