《自然》20250612出版一周论文导读

 

Nature, 12 June 2025, Volume 642 Issue 8067

《自然》，2025年6月12日，第642卷，8067期

物理学Physics

The structure of liquid carbon elucidated by in situ X-ray diffraction

原位X射线衍射解析液态碳结构

▲ 作者：D. Kraus, J. Rips, M. Schorner et al.

▲链接：

https://www.nature.com/articles/s41586-025-09035-6

▲摘要：在此，通过X射线自由电子激光器的原位X射线衍射，我们在约100万个大气压的压力下对液态碳进行了精确的结构测量。我们的结果显示了一个具有瞬态键、平均约有四个近邻的复杂流体，与量子分子动力学模拟一致。

我们获得的数据证实了对宇宙中最丰富的元素之一的液态的理解，并可以测试熔化线的模型。其中所展示的实验能力为在极端条件下对由轻元素组成的液体的结构进行类似的研究开辟了道路。

▲ Abstract：Here we present a precise structure measurement of liquid carbon at pressures of around 1 million atmospheres obtained by in situ X-ray diffraction at an X-ray free-electron laser. Our results show a complex fluid with transient bonding and approximately four nearest neighbours on average, in agreement with quantum molecular dynamics simulations. The obtained data substantiate the understanding of the liquid state of one of the most abundant elements in the universe and can test models of the melting line. The demonstrated experimental abilities open the path to performing similar studies of the structure of liquids composed of light elements at extreme conditions.

化学Chemistry

Preparation of a neutral nitrogen allotrope hexanitrogen C