Surface temperature dependence of oxidation of Cu3Au(111)

Tsuda, Yasutaka*; Makino, Takamasa*; Okada, Michio*; Yoshigoe, Akitaka ; Teraoka, Yuden

Oxidation processes of alloy materials are important chemical reactions for the fabrication of protective layers used in various industrial applications. In this study, surface temperature dependence of oxidation of Cu $_{3}$ Au(111) was studied using synchrotron radiation XPS and molecular beams. It was found that no dependence among uptake curves was observed from 300 to 500 K in low oxygen dosage because a direct dissociative adsorption takes place in this incident energy region. In contrast, clear difference between 400 and 500 K due to Cu $_{2}$ O formation was observed. This result suggests that thermal-driven diffusion of Au atoms into bulk depress the protective function for oxidation.

Language	:	Japanese
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Meeting title	:	2015年秋季第76回応用物理学会学術講演会
Held date	:	2015/09
Location (city)	:	名古屋
Location (country)	:	日本
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Keywords	:	放射光光電子分光; 酸化; 合金
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : BB20152253
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