论文标题
纳米化的单原子钯金属玻璃
Nanosized Monoatomic Palladium Metallic Glass
论文作者
论文摘要
物理上玻璃化金属玻璃需要超高冷却速率，对于大多数最接近包装的金属而言，这仍然是无法实现的。在这里，我们报告了一种简便的合成策略，用于创建单原子金属玻璃纳米颗粒，其纯度为99.35 +/- 0.23 at 0.23 at palladium-silicon液滴，使用低于1000 k/s的冷却速率。原位环境透射电子显微镜直接检测到硅的浸出。进一步的氢吸收实验表明，该钯金属玻璃在氢气摄取时几乎没有扩展，这表现出很大的潜在应用氢分离。我们的结果提供了对纳米级单原子金属玻璃形成的见解。
Physically vitrifying single-element metallic glass requires ultrahigh cooling rates, which are still unachievable for most of the closest-packed metals. Here, we report a facile synthetic strategy for creating mono-atomic palladium metallic glass nanoparticles with a purity of 99.35 +/- 0.23 at% from palladium-silicon liquid droplets using a cooling rate below 1000 K/s. In-situ environmental transmission electron microscopy directly detected the leaching of silicon. Further hydrogen absorption experiment showed that this palladium metallic glass expanded little upon hydrogen uptake, exhibiting a great potential application for hydrogen separation. Our results provide insight into the formation of mono-atomic metallic glass at nanoscale.
