Synthesis of NiO nanowalls by thermal treatment of Ni film deposited onto a stainless steel substrate

  • Zhang K
  • Rossi C
  • Alphonse P
 et al. 
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Two-dimensional nanostructures have a variety of applications due to their large surface areas. In this study, the authors present a simple and convenient method to realize two-dimensional NiO nanowalls by thermal treatment of a Ni thin film deposited by sputtering onto a stainless steel substrate. The substrate surface area is supposed to be significantly increased by creating nanowalls. The effects on the nanowall morphology of the thermal treatment temperature and duration are investigated. A mechanism based on the surface diffusion of Ni(2+) ions from the Ni base film is then proposed for the growth of the NiO nanowalls. The as-synthesized NiO nanowalls are characterized by scanning electron microscopy, energy-dispersive x-ray analysis, x-ray diffraction, transmission electron microscopy and high resolution transmission electron microscopy.

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  • Carole RossiLaboratoire d'analyse et d'architecture des systèmes

  • Kaili Zhang

  • Pierre Alphonse

  • Christophe Tenailleau

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