Department of Materials Science and Engineering, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX, 75080, USA.
Adv Mater. 2017 May;29(18). doi: 10.1002/adma.201606264. Epub 2017 Mar 10.
A novel phase transition, from multilayered 2H-MoTe to a parallel bundle of sub-nanometer-diameter metallic Mo Te nanowires (NWs) driven by catalyzer-free thermal-activation (400-500 °C) under vacuum, is demonstrated. The NWs form along the 〈11-20〉 2H-MoTe crystallographic directions with lengths in the micrometer range. The metallic NWs can act as an efficient hole injection layer on top of 2H-MoTe due to favorable band-alignment. In particular, an atomically sharp MoTe /Mo Te interface and van der Waals gap with the 2H layers are preserved. The work highlights an alternative pathway for forming a new transition metal dichalcogenide phase and will enable future exploration of its intrinsic transportation properties.
一种新的相转变，即由多层 2H-MoTe 通过无催化剂的热激活（400-500°C）在真空中转变为平行的亚纳米直径金属 MoTe 纳米线（NWs），已经得到证明。NWs 沿着 〈11-20〉 2H-MoTe 晶向形成，长度在微米范围内。由于有利的能带排列，金属 NWs 可以作为 2H-MoTe 顶部的有效空穴注入层。特别是，原子级锐利的 MoTe/MoTe 界面和与 2H 层的范德华间隙得以保留。这项工作突出了形成新的过渡金属二卤代物相的另一种途径，并将能够探索其内在的输运性质。
