Single-element amorphous palladium nanoparticles formed via phase separation

Physically vitrifying amorphous single-element metal requires ultrahigh cooling rates,which are still unachievable for most of the closest-packed metals.Here,we report a facile chemical synthetic strategy for single-element amorphous palladium nanoparticles with a purity of 99.35 at.%±0.23 at.%from palladium–silicon liquid droplets.In-situ transmission electron microscopy directly detected the solidification of palladium and the separation of silicon.Further hydrogen absorption experiment showed that the amorphous palladium expanded little upon hydrogen uptake,exhibiting a great potential application for hydrogen separation.Our results provide insight into the formation of amorphous metal at nanoscale.

心力衰竭室性心律失常与心脏性猝死的研究及治疗进展

心力衰竭是各种心脏疾病的终末表现,心力衰竭患者合并室性心律失常是临床上一种常见现象,室性心律失常是心力衰竭患者心脏性猝死的主要原因。通过研究心力衰竭患者室性心律失常发生机制和猝死风险,对患者进行危险分层并实施安全有效的干预措施,对于降低心力衰竭患者的死亡率及改善预后有重要临床意义。