DePond et al.

Laser-metal interaction dynamics during additive manufacturing resolved by detection of thermally-induced electron emission

Browse Articles

  • Article
    | Open Access

    In glass formation, the dynamics of extended structures beyond atomic short-range order is yet to be understood. Here, persistent homology, combined with machine learning, reveals superstructures made of 3-to-9 prism-type atomic clusters which undergo drastic changes according to the glass cooling rate.

    • Akihiko Hirata
    • , Tomohide Wada
    • , Ippei Obayashi
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    | Open Access

    Perovskite solar cells have seen a strong improvement in power conversion efficiency, but their intrinsic degradation is yet to be elucidated. Here, operando electron spin resonance is used to probe the number of spin states and relate its variation with the device performance under operation.

    • Takahiro Watanabe
    • , Toshihiro Yamanari
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    | Open Access

    Nanoplastics are a substantial environmental risk, and it is important to understanding where and how they are released into the environment. Here, a simple methodology is reported for the one-step synthesis of radiolabelled nanopolystyrene that can be used in environmental studies.

    • Maya Al-Sid-Cheikh
    • , Steven J. Rowland
    • , Ralf Kaegi
    • , Theodore B. Henry
    • , Marc-André Cormier
    •  & Richard C. Thompson
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    | Open Access

    Controlling daytime passive radiative cooling is essential in designing energy-saving buildings. Here, the authors propose a reconfigurable nanophotonic structure that can continuously adjust its radiative cooling rate by mechanical deformation according to the ambient temperature.

    • Xiaojie Liu
    • , Yanpei Tian
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    • , Alok Ghanekar
    • , Mauro Antezza
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  • Article
    | Open Access

    The origin of large mobility modulation in ultrathin oxide transistors, promising for their high on-off ratio, remains mostly unknown. Here, a 106 gate-induced mobility modulation in 3.5 nm-thick TiOx transistors is explained by a high density of tail states, mediating variable range hopping of carriers.

    • Nikhil Tiwale
    • , Ashwanth Subramanian
    • , Zhongwei Dai
    • , Sayantani Sikder
    • , Jerzy T. Sadowski
    •  & Chang-Yong Nam
  • Article
    | Open Access

    In situ monitoring during additive manufacturing is an emerging approach for validating the quality of built parts. Here, thermal emission of electrons from the metal surface during laser processing is shown to be an effective indicator of conduction or keyhole melting regimes.

    • Philip J. DePond
    • , John C. Fuller
    • , Saad A. Khairallah
    • , Justin R. Angus
    • , Gabe Guss
    • , Manyalibo J. Matthews
    •  & Aiden A. Martin
  • Article
    | Open Access

    Polymer-matrix composites have a number of attractive properties for use as dielectrics in electrostatic energy storage devices. Here, a BaTiO3 sponge filled with epoxy achieves a high dielectric constant and energy density, attributed to large local electrical displacements.

    • Gang Jian
    • , Yong Jiao
    • , Qingzhen Meng
    • , Zhaoyu Wei
    • , Jiaoxia Zhang
    • , Chao Yan
    • , Kyoung-Sik Moon
    •  & Ching-Ping Wong
  • Article
    | Open Access

    Photocatalysts with broad-spectrum light activation are needed for high efficiency water splitting. Here, an upconversion process in oxygen-doped carbon nitride nanosheets contributes to enhanced photocatalytic activity under both visible and infrared light.

    • Zhengyuan Jin
    • , Xiantao Jiang
    • , Qitao Zhang
    • , Shaolong Huang
    • , Luhong Zhang
    • , Lili Huang
    • , Tingchao He
    • , Han Zhang
    • , Teruhisa Ohno
    • , Shuangchen Ruan
    •  & Yu-Jia Zeng