Deposition behavior of Ni on Si(100) surfaces in an aqueous alkaline solution

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Abstract

The spontaneous deposition of Ni on Si(100) surface in aqueous alkaline solution was investigated under various conditions. In a 0.1 M NiSO4 solution containing 0.2-0.5 M (NH4)2SO4, the optimum pH for the homogeneous deposition at 60-80°C at each set of operating conditions shifted in the high-pH direction as both (NH 4)2SO4 concentration and the operating temperature were decreased. The potential at which the deposition terminates and the deposition duration were determined from electrochemical open-circuit potential profiles. The different behaviors, observed at different pH levels, are discussed in terms of these potential measurements. Ultraviolet-visible absorption spectra of various Ni solutions used indicated that the deposition behavior was strongly affected by the composition of the Ni complex and the reactivity of Si surface. The deposition reaction efficiently proceeded when the Ni complex was present in a specific composition. The anodic reaction rate of Si decreased steeply when the solution temperature was lowered. The optimum condition for the homogeneous deposition was greatly affected by the reactivity of the Si surface rather man the composition of the complex, the higher pH favoring the overall reaction.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume152
Issue number2
DOIs
Publication statusPublished - 2005

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reactivity
Chemical analysis
visible spectrum
operating temperature
Reaction rates
Absorption spectra
reaction kinetics
absorption spectra
Temperature
Networks (circuits)
profiles
temperature
Direction compound

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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title = "Deposition behavior of Ni on Si(100) surfaces in an aqueous alkaline solution",
abstract = "The spontaneous deposition of Ni on Si(100) surface in aqueous alkaline solution was investigated under various conditions. In a 0.1 M NiSO4 solution containing 0.2-0.5 M (NH4)2SO4, the optimum pH for the homogeneous deposition at 60-80°C at each set of operating conditions shifted in the high-pH direction as both (NH 4)2SO4 concentration and the operating temperature were decreased. The potential at which the deposition terminates and the deposition duration were determined from electrochemical open-circuit potential profiles. The different behaviors, observed at different pH levels, are discussed in terms of these potential measurements. Ultraviolet-visible absorption spectra of various Ni solutions used indicated that the deposition behavior was strongly affected by the composition of the Ni complex and the reactivity of Si surface. The deposition reaction efficiently proceeded when the Ni complex was present in a specific composition. The anodic reaction rate of Si decreased steeply when the solution temperature was lowered. The optimum condition for the homogeneous deposition was greatly affected by the reactivity of the Si surface rather man the composition of the complex, the higher pH favoring the overall reaction.",
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T1 - Deposition behavior of Ni on Si(100) surfaces in an aqueous alkaline solution

AU - Niwa, Daisuke

AU - Homma, Takayuki

AU - Osaka, Tetsuya

PY - 2005

Y1 - 2005

N2 - The spontaneous deposition of Ni on Si(100) surface in aqueous alkaline solution was investigated under various conditions. In a 0.1 M NiSO4 solution containing 0.2-0.5 M (NH4)2SO4, the optimum pH for the homogeneous deposition at 60-80°C at each set of operating conditions shifted in the high-pH direction as both (NH 4)2SO4 concentration and the operating temperature were decreased. The potential at which the deposition terminates and the deposition duration were determined from electrochemical open-circuit potential profiles. The different behaviors, observed at different pH levels, are discussed in terms of these potential measurements. Ultraviolet-visible absorption spectra of various Ni solutions used indicated that the deposition behavior was strongly affected by the composition of the Ni complex and the reactivity of Si surface. The deposition reaction efficiently proceeded when the Ni complex was present in a specific composition. The anodic reaction rate of Si decreased steeply when the solution temperature was lowered. The optimum condition for the homogeneous deposition was greatly affected by the reactivity of the Si surface rather man the composition of the complex, the higher pH favoring the overall reaction.

AB - The spontaneous deposition of Ni on Si(100) surface in aqueous alkaline solution was investigated under various conditions. In a 0.1 M NiSO4 solution containing 0.2-0.5 M (NH4)2SO4, the optimum pH for the homogeneous deposition at 60-80°C at each set of operating conditions shifted in the high-pH direction as both (NH 4)2SO4 concentration and the operating temperature were decreased. The potential at which the deposition terminates and the deposition duration were determined from electrochemical open-circuit potential profiles. The different behaviors, observed at different pH levels, are discussed in terms of these potential measurements. Ultraviolet-visible absorption spectra of various Ni solutions used indicated that the deposition behavior was strongly affected by the composition of the Ni complex and the reactivity of Si surface. The deposition reaction efficiently proceeded when the Ni complex was present in a specific composition. The anodic reaction rate of Si decreased steeply when the solution temperature was lowered. The optimum condition for the homogeneous deposition was greatly affected by the reactivity of the Si surface rather man the composition of the complex, the higher pH favoring the overall reaction.

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