Unprecedented New Crystalline Forms of SnSe in Narrow to Medium Diameter Carbon Nanotubes.
Unprecedented New Crystalline Forms of SnSe in Narrow to Medium Diameter Carbon Nanotubes.
复制标题
DOI：
10.1021/acs.nanolett.9b00133
复制
发表时间：
2019-04
期刊：
影响因子：
10.8
通讯作者：
Charlotte A. Slade;A. Sánchez;J. Sloan
中科院分区：
文献类型：
--
作者：
Charlotte A. Slade;A. Sánchez;J. Sloan
我们报告了四种前所未有的新型 SnSe 晶型的观察结果，这些晶型是通过封装在窄到中等直径的单壁碳纳米管中而获得的。 80 kV 下的像差校正扫描透射电子显微镜揭示了线性、锯齿形、螺旋（即 2 × 1）原子链和一种新形式的封装 SnSe。这种新形式显然与从相应的单层二硫属化物蚀刻而成的独立 MoS、MoSe 和 WSe 极端纳米线以及最近观察到的封装 MoTe 具有同构结构。从环形暗场（ADF）图像中获得了结构模型。实验成像与根据新结构形式预期的模型生成的图像模拟非常吻合。
We report the observation of four unprecedented new crystalline forms of SnSe, obtained as a result of encapsulation in narrow to medium diameter single-walled carbon nanotubes. Aberration-corrected scanning transmission electron microscopy at 80 kV revealed linear, zigzag, helical (i.e., 2 × 1) atomic chains and a new form of encapsulated SnSe. This new form is apparently isostructural to free-standing MoS, MoSe, and WSe extreme nanowires etched from the corresponding monolayer dichalcogenides and also recently observed encapsulated MoTe. A structural model has been attained from annular dark-field (ADF) images. The experimental imaging agrees well with image simulations produced from models anticipated for the new structural forms.