In situ atomic force microscopy of under- and overpotentially deposited cadmium on Cu(111)

Maohui Ge, Andrew A Gewirth

Research output: Contribution to journalArticle

Abstract

The structure of the monolayer of Cd atoms underpotentially deposited on a Cu(111) surface in perchlorate electrolyte was revealed by an atomic force microscope (AFM). A hexagonal adlattice with a 3.43 Å lattice spacing was observed. This spacing, combined with its orientation relative to the underlying Cu(111), implies that the Cd lattice has a (4 × 4) structure. The slightly open lattice of the first Cd adlayer is possibly due to the retained partial charge of Cd adatoms. In the overpotential region, both the atomic structure and large scale morphology showed the formation of the Cd(0001) hcp crystalline structure. The crystalline domains were several hundred nanometers across and grow via a modified Stranski-Krastonov mechanism.

Original languageEnglish (US)
Pages (from-to)140-148
Number of pages9
JournalSurface Science
Volume324
Issue number2-3
DOIs
StatePublished - Feb 10 1995

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Keywords

  • Atomic force microscopy
  • Cadmium
  • Copper

ASJC Scopus subject areas

  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry

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