Phase formation of nanolaminated Mo2AuC and Mo2(Au1−xGax)2C by a substitutional reaction within Au-capped Mo2GaC and Mo2Ga2C thin films,Nanoscale

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Phase formation of nanolaminated Mo2AuC and Mo2(Au1−xGax)2C by a substitutional reaction within Au-capped Mo2GaC and Mo2Ga2C thin films
Nanoscale ( IF 5.8 ) Pub Date : 2017-10-23 00:00:00 , DOI: 10.1039/c7nr03663a
Chung-Chuan Lai _{1,

2,

3,

4,

5} , Hossein Fashandi _{1,

2,

3,

4,

5} , Jun Lu _{1,

2,

3,

4,

5} , Justinas Palisaitis _{1,

2,

3,

4,

5} , Per O. Å. Persson _{1,

2,

3,

4,

5} , Lars Hultman _{1,

2,

3,

4,

5} , Per Eklund _{1,

2,

3,

4,

5} , Johanna Rosen _{1,

2,

3,

4,

5}

Affiliation

Au-containing nanolaminated carbides Mo₂AuC and Mo₂(Au_1−xGa_x)₂C were synthesized by a thermally induced substitutional reaction in Mo₂GaC and Mo₂Ga₂C, respectively. The Au substitution of the Ga layers in the structures was observed using cross-sectional high-resolution scanning transmission electron microscopy. Expansion of c lattice parameters was also observed in the Au-containing phases compared to the original phases. Energy dispersive spectroscopy detected residual Ga in Au-substituted layers of both phases with a peculiar Ga in-plane ordering for Au : Ga = 9 : 1 ratio along the Au–Ga layers in Mo₂(Au_1−xGa_x)₂C. These results indicate a generalization of the Au substitution reaction for the A elements in MAX phases.

中文翻译：

通过Au封盖的Mo ₂ GaC和Mo ₂ Ga ₂ C薄膜中的置换反应，形成纳米层压的Mo ₂ AuC和Mo ₂（Au _{1- x} Ga _x）₂ C的相形成

-含Au纳米层压碳化物沫₂的AuC和Mo ₂（AU _{1- X}嘎_X）₂ C下通过在沫热诱导的取代反应合成₂ GAC和沫₂嘎₂分别C，。使用截面高分辨率扫描透射电子显微镜观察结构中Ga层的Au取代。扩展c与原始相相比，在含金相中也观察到晶格参数。能量色散谱法检测到沿Mo ₂（Au _{1- x} Ga _x）₂ C中的Au-Ga层，Au：Ga = 9：1的比率具有奇异的Ga面内次序，在两相的Au取代层中检测到残留的Ga。这些结果表明Au元素在MAX相中的Au取代反应的一般化。

更新日期：2017-11-23

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