Oxidation of TiNi surface with hyperthermal oxygen molecular beams
Oxidation of TiNi surface with hyperthermal oxygen molecular beams
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DOI:
10.1016/j.apsusc.2010.12.033
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发表时间:
2011-02
影响因子:
6.7
通讯作者:
M. Okada;Makoto Souwa;T. Kasai;Y. Teraoka
中科院分区:
文献类型:
--
作者:
M. Okada;Makoto Souwa;T. Kasai;Y. Teraoka
We report results of our detailed studies on the initial oxidation process of TiNi with a 2eV hyperthermal oxygen molecular beam (HOMB) and thermal O2in the backfilling. The oxidation processes are monitored by X-ray photoemission spectroscopy (XPS) measurements in conjunction with synchrotron radiation (SR). In the early stage of oxidation, the precursor mediated dissociative adsorption is the dominant reaction mechanism. In the oxide formation process at higher O coverage, HOMB has the advantage in the dissociation process of O2molecule and can grow TiO2layers with the underlying TiOx-rich and/or Ni-rich layers. We succeeded in fabricating thick Ni-free TiO2layer, possibly blue colored rutile TiO2, combining HOMB and surface annealing.