In situ surface X-ray diffraction study of ultrathin epitaxial Co films on Au(111) in alkaline solution
In situ surface X-ray diffraction study of ultrathin epitaxial Co films on Au(111) in alkaline solution
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Au(111)上超薄外延Co薄膜在碱性溶液中的原位表面X射线衍射研究
DOI:
10.1016/j.electacta.2016.01.052
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发表时间:
2016
影响因子:
6.6
通讯作者:
O. M. Magnussen
中科院分区:
文献类型:
--
作者:
F. Reikowski;F. Maroun;D. Nan;P. Allongue;M. Ruge;J. Stettner;O. M. Magnussen
The oxidation behavior of ultrathin electrodeposited Co films on Au(111) in alkaline electrolyte was studied usingin situsurface X-ray scattering techniques employing synchrotron radiation and complementary optical reflectivity and electrochemical measurements. The films are formed at pH 4 and consist of (001)-oriented hcp Co crystallites that are several nm high, a few ten nm in diameter, and remain largely unchanged after electrolyte exchange to pH 12 solution. In the pre-oxidation peak only minor changes were observed in the diffraction studies, excluding the formation of Co(OH)2layers. In the potential regime of Co hydroxide formation a rapid reduction of the amount of Co is observed, while the characteristic height of the islands decreases only slightly. On longer times scales, growth of 3D crystals of Co(OH)2occurs as well as irreversible Co dissolution into the electrolyte is found. On the basis of the structural observations oxidation of the Co film is proposed to proceed via fast formation of an ultrathin passivating layer, followed by nucleation and growth of 3D hydroxide crystals at the grain boundaries in the Co deposit.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Y. Gründer;F. Renner;Tien;D. Dheeraj;B. Fimland;J. Zegenhagen
通讯作者:
J. Zegenhagen
DOI:
--
发表时间:
1935
期刊:
影响因子:
--
作者:
W. Feitknecht;W. Lotmar
通讯作者:
W. Lotmar
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
J. Schultze;A. W. Hassel
通讯作者:
A. W. Hassel
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
S. Ando;Takeshi Suzuki;K. Itaya
通讯作者:
K. Itaya
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
I. Epelboin;C. Gabrielli;P. Morel
通讯作者:
P. Morel