2D Atomic Mapping of Oxidation States in Transition Metal Oxides by Scanning Transmission Electron Microscopy and Electron Energy-Loss Spectroscopy

被引：120

作者：

Tan, Haiyan ^{[1
]}

Turner, Stuart ^{[1
]}

Yucelen, Emrah ^{[2
,3
]}

Verbeeck, Jo ^{[1
]}

Van Tendeloo, Gustaaf ^{[1
]}

机构：

[1] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

[2] FEI Co, Europe NanoPort, NL-5651 GG Eindhoven, Netherlands

[3] Delft Univ Technol, Natl Ctr HREM, NL-2628 CJ Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 10期

基金：

欧洲研究理事会;

关键词：

FERROELECTRICITY; VALENCE; EELS;

D O I：

10.1103/PhysRevLett.107.107602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a combination of high-angle annular dark-field scanning transmission electron microscopy and atomically resolved electron energy-loss spectroscopy in an aberration-corrected transmission electron microscope we demonstrate the possibility of 2D atom by atom valence mapping in the mixed valence compound Mn3O4. The Mn L-2,L-3 energy-loss near-edge structures from Mn2+ and Mn3+ cation sites are similar to those of MnO and Mn2O3 references. Comparison with simulations shows that even though a local interpretation is valid here, intermixing of the inelastic signal plays a significant role. This type of experiment should be applicable to challenging topics in materials science, such as the investigation of charge ordering or single atom column oxidation states in, e.g., dislocations.

引用

页数：4

共 40 条

[1] Modelling high-resolution electron microscopy based on core-loss spectroscopy [J].