Simultaneous chemical silver and palladium deposition on porous silicon; FESEM, TEM, EDX and XRD investigation

Andrea Edit Pap, Krisztián Kordás, Raija Peura, Seppo Leppävuori

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Simultaneous palladium and silver deposition on porous silicon (PS) by immersion plating from aqueous [Pd(NH 3 ) 4 ] 2+ and [Ag(NH 3 ) 2 ] + complexes were carried out and studied by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray analysis and X-ray diffraction. As the measurements revealed, the deposits were individual Pd and Ag seeds both in the pores and on the surface of the PS without forming Pd-Ag alloys. Palladium was present in the form of small spherical grains with diameter of 1-40 nm. In case of silver, two types of deposits could be distinguished. When high silver-complex ion concentration was applied, the deposition of Ag grains (d = 60-100 nm) took place in the pores and on the surface as well. In case of lowered [Ag(NH 3 ) 2 ] + concentrations, the formation of a three-dimensional porous silver networks (built up from silver particles of 30-40 nm in diameter) - on the top surface of the porous silicon layer - was advanced.

Original languageEnglish
Pages (from-to)56-60
Number of pages5
JournalApplied Surface Science
Volume201
Issue number1-4
DOIs
Publication statusPublished - Nov 30 2002

Keywords

  • Nano-materials
  • Palladium
  • Plating
  • Porous silicon
  • Silver

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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