Atomically Resolved Structural and Chemical Investigation of Single MXene Sheets

被引：448

作者：

Karlsson, Linda H. ^{[1
]}

Birch, Jens ^{[1
]}

Halim, Joseph ^{[1
,2
]}

Barsoum, Michel W. ^{[1
,2
]}

Persson, Per O. A. ^{[1
]}

机构：

[1] Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden

[2] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

来源：

NANO LETTERS | 2015年 / 15卷 / 08期

基金：

瑞典研究理事会;

关键词：

MXene; Ti3C2Tx; aberration corrected STEM; surface chemistry; surface termination; CARBIDES; SURFACES; TI3C2; LI;

D O I：

10.1021/acs.nanolett.5b00737

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The properties of two-dimensional (2D) materials depend strongly on the chemical and electrochemical activity of their surfaces. Name, 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.

引用

页码：4955 / 4960

页数：6

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