Initial Growth and Surface Alloy Formation of Ag on Pt(lll)

Low-energy electron diffraction (LEED), Auger electron spectroscopy (AES) and ultraviolet photoelectron spectroscopy (UPS) were used to study the growth mode and the surface structure of a silver ultra-thin film deposited on a Pt(lll) surface at 360 K. The AES and LEED results show that the growth of Ag/Pt(lll) belongs to the Stranski-Krastanov mode. The growth mechanism is discussed. The electron density of states in the growth process was investigated by UPS. A splitting of Ag 4d5/2 and Ag 4d3/2 was observed as the absorbed Ag atoms changed from an atomic state to a solid state. In the LEED study, the intensity of the specular beam versus the surface temperature has an abnormal change and is irreversible between 550 K and 650 K, as the coverage is in the submonolayer range. These phenomena, and the Auger-intensity ratio of Ag and Pt varying with the temperature, show that a two-dimensional surface alloy develops at a temperature above 550 K, as the coverage is within one monolayer.

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Yuen, C. C. (2014). 有序氧化矽、氯化鈉單一原子層在矽晶面上的成長過程 [doctoral dissertation, National Tsing Hua University]. Airiti Library. https://doi.org/10.6843/NTHU.2014.00005

T.G.Varadaraju (2010). 多甲基咖啡酸二聚體及三聚體作為抗愛滋病毒試劑之不對稱全合成與迷迭香酸之全合成 [doctoral dissertation, National Tsing Hua University]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0016-1901201111395874

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Initial Growth and Surface Alloy Formation of Ag on Pt(lll)

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