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<p>Atom-thin amorphous materials (for example, amorphous monolayer carbon) offer a designable material platform for fundamental studies of the disorder system, as well as the development of various applications. However, their growth at a single layer remains challenging since their thermodynamically favourable grains are neither two dimensional nor layered. Here we demonstrate the growth of 1-nm-thick, amorphous metal chalcogenides at a wafer scale using a nanodroplet-driven nanoribbon-to-film strategy. Metal clusters are initially liquified into 1–2 nm droplets at 120 °C, and they then orchestrate the growth of amorphous single-layer nanoribbons, which eventually merge into a continuous centimetre-scale film. Phase-field simulations, combined with our characterizations, suggest a non-equilibrium kinetic growth mechanism, which can be applicable to various films, for example, PtSe<sub><i>x</i></sub>, IrSe<sub><i>x</i></sub>, PdSe<sub><i>x</i></sub> and RhSe<sub><i>x</i></sub>. The synthesized films exhibit a range of unique properties, including tunable conductivity through disorder modulation, high work functions and remarkable catalytic activity, making them promising candidates for hole-injection contacts in p-type transistors and hydrogen production applications. This work opens a pathway for the synthesis of non-layered materials approaching the single-layer limit.</p>

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Sub-2-nm-droplet-driven growth of amorphous metal chalcogenides approaching the single-layer limit

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Zude Shi,
  • Wen Qin,
  • Zhili Hu,
  • Mingyu Ma,
  • Hong Liu,
  • Zhiwen Shu,
  • Yubing Jiang,
  • Hang Xia,
  • Wenyan Shi,
  • Chao Yue Zhang,
  • Xiaoru Sang,
  • Cui Guo,
  • Yunxin Li,
  • Chengzhi Liu,
  • Chengshi Gong,
  • Hong Wang,
  • Song Liu,
  • Levente Tapasztó,
  • Caitian Gao,
  • Fucai Liu,
  • Pengyi Tang,
  • Yuan Liu,
  • Huigao Duan,
  • Erqing Xie,
  • Zhuhua Zhang,
  • Zheng Liu,
  • Yongmin He

摘要

Atom-thin amorphous materials (for example, amorphous monolayer carbon) offer a designable material platform for fundamental studies of the disorder system, as well as the development of various applications. However, their growth at a single layer remains challenging since their thermodynamically favourable grains are neither two dimensional nor layered. Here we demonstrate the growth of 1-nm-thick, amorphous metal chalcogenides at a wafer scale using a nanodroplet-driven nanoribbon-to-film strategy. Metal clusters are initially liquified into 1–2 nm droplets at 120 °C, and they then orchestrate the growth of amorphous single-layer nanoribbons, which eventually merge into a continuous centimetre-scale film. Phase-field simulations, combined with our characterizations, suggest a non-equilibrium kinetic growth mechanism, which can be applicable to various films, for example, PtSex, IrSex, PdSex and RhSex. The synthesized films exhibit a range of unique properties, including tunable conductivity through disorder modulation, high work functions and remarkable catalytic activity, making them promising candidates for hole-injection contacts in p-type transistors and hydrogen production applications. This work opens a pathway for the synthesis of non-layered materials approaching the single-layer limit.