In situ observations of oxygen adsorption on a Cu(100) substrate using atomic force microscopy

Brandon J Cruickshank, Douglas D. Sneddon, Andrew A. Gewirth

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

In situ atomic force microscopy (AFM) images of Cu(100) single crystals in dilute acid solutions reveal that a ( 2 × 2)R45° adlattice is formed on this material at negative potentials. This adlattice can be removed by sweeping the potential of the Cu(100) surface approximately 0.5 V negative of the open circuit potential. Based on the insensitivity of the ( 2 × 2)R45° structure to electrolyte and electrode surface preparation, and our data showing that Cu(111) surfaces in the same acidic solution exhibit only the hexagonal Cu lattice, we associate the overlayer with adsorbed O or OH-, in which the oxygen is chemisorbed in alternate 4-fold hollow sites. AFM images of monatomic steps in an electrochemical environment are reported.

Original languageEnglish (US)
JournalSurface Science
Volume281
Issue number1-2
DOIs
StatePublished - Jan 20 1993
Externally publishedYes

Fingerprint

Atomic force microscopy
atomic force microscopy
Oxygen
Adsorption
adsorption
oxygen
Substrates
Electrolytes
hollow
Single crystals
electrolytes
preparation
Electrodes
acids
Acids
electrodes
Networks (circuits)
sensitivity
single crystals
hydroxide ion

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

In situ observations of oxygen adsorption on a Cu(100) substrate using atomic force microscopy. / Cruickshank, Brandon J; Sneddon, Douglas D.; Gewirth, Andrew A.

In: Surface Science, Vol. 281, No. 1-2, 20.01.1993.

Research output: Contribution to journalArticle

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