材料科学
钛
纳米技术
曲面(拓扑)
晶体缺陷
化学物理
化学
结晶学
冶金
几何学
数学
作者
Linda Karlsson,Jens Birch,Joseph Halim,Michel W. Barsoum,Per Persson
出处
期刊:Nano Letters
[American Chemical Society]
日期:2015-07-27
卷期号:15 (8): 4955-4960
被引量:410
标识
DOI:10.1021/acs.nanolett.5b00737
摘要
The properties of two-dimensional (2D) materials depend strongly on the chemical and electrochemical activity of their surfaces. MXene, one of the most recent additions to 2D materials, shows great promise as an energy storage material. In the present investigation, the chemical and structural properties of individual Ti3C2 MXene sheets with associated surface groups are investigated at the atomic level by aberration corrected STEM-EELS. The MXene sheets are shown to exhibit a nonuniform coverage of O-based surface groups which locally affect the chemistry. Additionally, native point defects which are proposed to affect the local surface chemistry, such as oxidized titanium adatoms (TiOx), are identified and found to be mobile.
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