Health & Environmental Research Online (HERO)


Print Feedback Export to File
8105876 
Journal Article 
Nitrogen in black phosphorus structure 
Ji, C; Adeleke, AA; Yang, L; Wan, B; Gou, H; Yao, Y; Li, B; Meng, Y; Smith, JS; Prakapenka, VB; Liu, W; Shen, G; Mao, WL; Mao, HK 
2020 
1 
Science Advances
EISSN: 2375-2548 
6 
23 
eaba9206 
English 
32537513 
WOS:000540787200048 
Group V elements in crystal structure isostructural to black phosphorus with unique puckered two-dimensional layers exhibit exciting physical and chemical phenomena. However, as the first element of group V, nitrogen has never been found in the black phosphorus structure. Here, we report the synthesis of the black phosphorus-structured nitrogen at 146 GPa and 2200 K. Metastable black phosphorus-structured nitrogen was retained after quenching it to room temperature under compression and characterized in situ during decompression to 48 GPa, using synchrotron x-ray diffraction and Raman spectroscopy. We show that the original molecular nitrogen is transformed into extended single-bonded structure through gauche and trans conformations. Raman spectroscopy shows that black phosphorus-structured nitrogen is strongly anisotropic and exhibits high Raman intensities in two A g normal modes. Synthesis of black phosphorus-structured nitrogen provides a firm base for exploring new type of high-energy-density nitrogen and a new direction of two-dimensional nitrogen.