Metal-Element-Incorporation Induced Superconducting Hydrogen Clathrate Structure at High Pressure

The recent observation of high critical temperature T_c in lanthanum and Yttrium hydrides confirms the key role of hydrogen cage(H-cage)in determining high superconductivity.Here,we present a new class of metastable H₁₂ clathrate structures based on the icosahedral cI 24-Na that can be stabilized by incorporation of metal elements.Analysis shows that the charge transfer from metal atoms to H atoms contributes to forming the H₁₂ clathrate.Nine dynamically stable structures are identified to exhibit superconductivity,and a maximum T_c of 28K is found in voids-doped Mo₆H₂₄.Calculations reveal that the low T_c is attributed to the weak interaction between H atoms in each cage due to the long H–H distance.The current results provide a possible route to design H-cage containing superconductors.     

MXene的制备及应用进展

近年来,随着可穿戴电子产品的飞速发展,柔性传感器也受到越来越多的关注。二维过渡金属碳/氮化物(MXene)因其具有良好的机械性能、优异的导电性和亲水性等优点,在电磁屏蔽、生物医药、能量转化与储存、传感器等领域都有广泛的应用。本综述首先对MXene的结构特点、制备方法以及其在多个领域的应用进行简介。进一步,重点围绕MXene在柔性压力/应变传感器、柔性温度传感器、柔性湿度传感器、柔性气体传感器等方面的研究,重点总结了MXene在柔性传感器领域的应用进展,最后,预测MXene基柔性传感器在未来会有更大的发展潜力。