Oxygen-induced formation of nanopyramids on W(111)

被引：2
|
作者：
El-Jawad, Mohammad [1 ]
Gilles, Bruno [1 ]
Maillard, Frederic [2 ]
机构：
[1] UJF, CNRS, G INP, Lab SIMAP,UMR 5614, F-38402 St Martin Dheres, France
[2] UJF, UdS, CNRS, G INP,Lab LEPMI,UMR 5279, F-38402 St Martin Dheres, France
来源：
ADVANCES IN INNOVATIVE MATERIALS AND APPLICATIONS | 2011年 / 324卷
关键词：
Thermal faceting; nanopyramids; W(111); Pt/W(111); O/W(111);
D O I：
10.4028/www.scientific.net/AMR.324.109
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, we investigated the role of oxygen in the faceting of the W(111) surface at temperatures close to T = 2000 degrees C. For that purpose, we characterized the W(111) surface before and after the annealing step by low energy electron diffraction (LEED), reflection high energy electron diffraction (RHEED), scanning tunneling microscopy (STM), and Auger electron spectroscopy (AES). It is found that W(111) undergoes a massive reconstruction to form three sided pyramids of nanometer dimensions with mainly {211} planes as facet sides. Interestingly, the facetted W(111) surface is deprived from oxygen. We then show how the facetted W(111) surface can be used as a template to deposit platinum by molecular beam epitaxy.
引用
收藏
页码：109 / +
页数：2
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