Thermally decomposed (110) surface of RuO2 single crystal

被引：5
作者：
Chung, Wen-Hung [1 ]
Tsai, Dah-Shyang [1 ]
Chen, Yi-Ming [2 ]
Huang, Ying-Sheng [2 ]
Chou, Chen-Chia [3 ]
Liu, Chin-hsin J. [1 ]
机构：
[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan
[2] Natl Taiwan Univ Sci & Technol, Dept Elect Engn, Taipei 106, Taiwan
[3] Natl Taiwan Univ Sci & Technol, Dept Mech Engn, Taipei 106, Taiwan
来源：
SOLID STATE COMMUNICATIONS | 2008年 / 146卷 / 11-12期
关键词：
surfaces; crystal structure; Raman scattering;
D O I：
10.1016/j.ssc.2008.04.007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
RuO2 single crystal is thermally reduced to generate a surface of coexisting Ru and RuO2(Ru/RuO2) on its (110) facet, which is investigated using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The reduced RuO2 (110) facet exhibits longitudinal fissures parallel to stripes of Ru nuclei in the c-axis of the Futile Structure, suggesting that the anisotropic lattice degradation commences at the weak links between the infinite chains of RuO6 octahedrons. Raman spectra of Ru/RuO2 surfaces reveal an additional feature at similar to 190 cm(-1) of the Ru phase among the RuO2 modes. The red-shifts and the asymmetric line width broadening of E-g mode of RuO2 features are analyzed by a spatial correlation model. The fitted correlation length estimates the size of RuO2 grains which remained on the partially decomposed surface. The XPS O 1s line of the Ru/RuO2 surface provides a sensitive indication of crystal decomposition, especially at high take-off angles. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：462 / 467
页数：6
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