Volume 13 Issue 7, July 2018

Volume 13 Issue 7

Stress-free strong carbon bundles

Carbon nanotubes (CNTs) are renowned for their exceptional mechanical properties, and especially for being one of the strongest materials known to date. When assembled in bundles, however, their tensile strength drops significantly below that of single CNTs due to misalignment, defects and impurities. Now, Bai and co-workers have obtained centimetre-long CNT bundles fabricated via a synchronous tightening and relaxing strategy aimed to release the non-uniform initial strains of individual CNTs. The mechanical properties of this CNT-based material show a significant macroscale enhancement with respect to other reported strong fibres as evidenced by a record high tensile strength of 80 GPa. The artist’s impression on the cover image shows such an aligned and defect-free ultralong bundle consisting of many individual CNTs.

See Zhang et al.

Image: Lei Chang, My Scimage Multimedia Technology Center. Cover Design: Alex Wing

Editorial

  • Editorial |

    Number of citations in academic papers is not always a good measure for the influence of applied research papers.

Thesis

  • Thesis |

    Chris Toumey explores the potential of sound as a way to investigate nature at the nanoscale.

    • Chris Toumey

Q&A

  • Q&A |

    Nature Nanotechnology has asked Jong-Hyun Ahn, Yi Cui and Hagan Bayley, corresponding authors of the three papers published in the journal that have received the highest number of citations in the patent literature, to share their insights about doing applied research in academia and whatit takes to transform an idea into a viable technology.

    • Alberto Moscatelli

Research Highlights

News & Views

Perspectives

  • Perspective |

    New tools and approaches in hazard and risk assessment of engineered nanomaterials may pave the way to safe nanomaterial-driven innovations.

    • Bengt Fadeel
    • , Lucian Farcal
    • , Barry Hardy
    • , Socorro Vázquez-Campos
    • , Danail Hristozov
    • , Antonio Marcomini
    • , Iseult Lynch
    • , Eugenia Valsami-Jones
    • , Harri Alenius
    •  & Kai Savolainen

Letters

  • Letter |

    Electrical control of magnetism in a bilayer of CrI3 enables the realization of an electrically driven magnetic phase transition and the observation of the magneto-optical Kerr effect in 2D magnets.

    • Bevin Huang
    • , Genevieve Clark
    • , Dahlia R. Klein
    • , David MacNeill
    • , Efrén Navarro-Moratalla
    • , Kyle L. Seyler
    • , Nathan Wilson
    • , Michael A. McGuire
    • , David H. Cobden
    • , Di Xiao
    • , Wang Yao
    • , Pablo Jarillo-Herrero
    •  & Xiaodong Xu
  • Letter |

    Electrostatic doping in vertical van der Waals CrI3–graphene heterostructures provides means to control the magnetic properties of monolayer and bilayer CrI3.

    • Shengwei Jiang
    • , Lizhong Li
    • , Zefang Wang
    • , Kin Fai Mak
    •  & Jie Shan
  • Letter |

    Few-layer semiconducting Cr2Ge2Te6 shows bipolar gate-tuned magnetism below its ferromagnetic Curie temperature.

    • Zhi Wang
    • , Tongyao Zhang
    • , Mei Ding
    • , Baojuan Dong
    • , Yanxu Li
    • , Maolin Chen
    • , Xiaoxi Li
    • , Jianqi Huang
    • , Hanwen Wang
    • , Xiaotian Zhao
    • , Yong Li
    • , Da Li
    • , Chuankun Jia
    • , Lidong Sun
    • , Huaihong Guo
    • , Yu Ye
    • , Dongming Sun
    • , Yuansen Chen
    • , Teng Yang
    • , Jing Zhang
    • , Shimpei Ono
    • , Zheng Han
    •  & Zhidong Zhang
  • Letter |

    A new superlattice fabrication process on 2D material heterostructures enables the observation of replica Dirac cones in graphene as well as Hofstadter’s fractal magnetic spectrum under triangular and square superlattice symmetries.

    • Carlos Forsythe
    • , Xiaodong Zhou
    • , Kenji Watanabe
    • , Takashi Taniguchi
    • , Abhay Pasupathy
    • , Pilkyung Moon
    • , Mikito Koshino
    • , Philip Kim
    •  & Cory R. Dean
  • Letter |

    Energy-looping excitation in lanthanide-doped upconverting nanoparticles enables low-threshold continuous-wave lasing in stand-alone microcavities.

    • Angel Fernandez-Bravo
    • , Kaiyuan Yao
    • , Edward S. Barnard
    • , Nicholas J. Borys
    • , Elizabeth S. Levy
    • , Bining Tian
    • , Cheryl A. Tajon
    • , Luca Moretti
    • , M. Virginia Altoe
    • , Shaul Aloni
    • , Kenes Beketayev
    • , Francesco Scotognella
    • , Bruce E. Cohen
    • , Emory M. Chan
    •  & P. James Schuck
  • Letter |

    A switchable electrokinetic nanovalving mechanism is capable of isolating a wide variety of single nanoscopic entities, down to single macromolecules, from an ensemble, and guiding, confining, releasing and sorting them in a broad range of ionic salt concentrations, up to biological buffer levels.

    • Patric Eberle
    • , Christian Höller
    • , Philipp Müller
    • , Maarit Suomalainen
    • , Urs F. Greber
    • , Hadi Eghlidi
    •  & Dimos Poulikakos

Articles

  • Article |

    Gate tunable and ultrabroadband third-harmonic generation can be achieved in graphene, paving the way for electrically tunable broadband frequency converters for applications in optical communications and signal processing.

    • Giancarlo Soavi
    • , Gang Wang
    • , Habib Rostami
    • , David G. Purdie
    • , Domenico De Fazio
    • , Teng Ma
    • , Birong Luo
    • , Junjia Wang
    • , Anna K. Ott
    • , Duhee Yoon
    • , Sean A. Bourelle
    • , Jakob E. Muench
    • , Ilya Goykhman
    • , Stefano Dal Conte
    • , Michele Celebrano
    • , Andrea Tomadin
    • , Marco Polini
    • , Giulio Cerullo
    •  & Andrea C. Ferrari
  • Article |

    Ultralong defect-free and well-aligned carbon nanotube bundles exhibit the highest tensile strength among known strong fibres.

    • Yunxiang Bai
    • , Rufan Zhang
    • , Xuan Ye
    • , Zhenxing Zhu
    • , Huanhuan Xie
    • , Boyuan Shen
    • , Dali Cai
    • , Bofei Liu
    • , Chenxi Zhang
    • , Zhao Jia
    • , Shenli Zhang
    • , Xide Li
    •  & Fei Wei
  • Article |

    A new non-van der Waals 2D material hematene, exfoliated from natural iron ore hematite, shows ferromagnetic ordering and enhanced photocatalytic activity.

    • Aravind Puthirath Balan
    • , Sruthi Radhakrishnan
    • , Cristiano F. Woellner
    • , Shyam K. Sinha
    • , Liangzi Deng
    • , Carlos de los Reyes
    • , Banki Manmadha Rao
    • , Maggie Paulose
    • , Ram Neupane
    • , Amey Apte
    • , Vidya Kochat
    • , Robert Vajtai
    • , Avetik R. Harutyunyan
    • , Ching-Wu Chu
    • , Gelu Costin
    • , Douglas S. Galvao
    • , Angel A. Martí
    • , Peter A. van Aken
    • , Oomman K. Varghese
    • , Chandra Sekhar Tiwary
    • , Anantharaman Malie Madom Ramaswamy Iyer
    •  & Pulickel M. Ajayan

Amendments & Corrections