Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA.
Department of Materials Science and Engineering, A.J.Drexel Nanomaterials Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA.
Phys Rev Lett. 2014 Mar 28;112(12):125501. doi: 10.1103/PhysRevLett.112.125501. Epub 2014 Mar 26.
The structures of nanocrystalline pristine, potassium hydroxide and sodium acetate intercalated new two-dimensional materials Ti3C2 MXenes were studied using the x-ray atomic pair distribution function technique. Pristine MXene has a hexagonal structure with a=b=3.0505(5) Å, c=19.86(2) Å (S.G. P63/mmc No. 194). Both hydroxyl and fluoride terminating species are present. The intercalation of K+ or Na+ ions expands the Ti3C2 layers perpendicular to the planes but shrinks the in-plane a and b lattice parameters.
使用 X 射线原子对分布函数技术研究了纳米晶原始、氢氧化钾和乙酸钠插层的新型二维材料 Ti3C2 MXenes 的结构。原始 MXene 具有六方结构，a=b=3.0505(5) Å，c=19.86(2) Å（空间群 P63/mmc No. 194）。同时存在羟基和氟终止基团。K+或 Na+离子的插层垂直于平面扩展了 Ti3C2 层，但缩小了层内 a 和 b 晶格参数。
