RT Journal Article
SR Electronic
T1 Nitrogen in black phosphorus structure
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaba9206
DO 10.1126/sciadv.aba9206
VO 6
IS 23
A1 Ji, Cheng
A1 Adeleke, Adebayo A.
A1 Yang, Liuxiang
A1 Wan, Biao
A1 Gou, Huiyang
A1 Yao, Yansun
A1 Li, Bing
A1 Meng, Yue
A1 Smith, Jesse S.
A1 Prakapenka, Vitali B.
A1 Liu, Wenjun
A1 Shen, Guoyin
A1 Mao, Wendy L.
A1 Mao, Ho-kwang
YR 2020
UL http://advances.sciencemag.org/content/6/23/eaba9206.abstract
AB 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 Ag 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.