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

B. J. Cruickshank; Douglas D. Sneddon; Andrew A. Gewirth

doi:10.1016/0039-6028(93)90845-B

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

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

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

97 Scopus citations

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 language	English (US)
Pages (from-to)	L308-L314
Journal	Surface Science
Volume	281
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(93)90845-B
State	Published - Jan 20 1993

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0039-6028(93)90845-B

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@article{950f72084c0b40e397dafa5ddeb531b0,

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

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.",

author = "Cruickshank, {B. J.} and Sneddon, {Douglas D.} and Gewirth, {Andrew A.}",

note = "Funding Information: B.J.C. acknowledgesa graduate fellowship from the Departmento f Education. A.A.G. acknowledges a Presidential Young Investigator Award with matchingf unds generouslyp rovided by Digital Instruments, Inc.. This investigation was supportedb y the US Departmento f Energy Grant No. DEFG02-91ER45439t hrought he Ma- terials ResearchL aboratory,U niversityo f Illinois at Urbana-Champaign.",

year = "1993",

month = jan,

day = "20",

doi = "10.1016/0039-6028(93)90845-B",

language = "English (US)",

volume = "281",

pages = "L308--L314",

journal = "Surface Science",

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T1 - In situ observations of oxygen adsorption on a Cu(100) substrate using atomic force microscopy

AU - Cruickshank, B. J.

AU - Sneddon, Douglas D.

AU - Gewirth, Andrew A.

N1 - Funding Information: B.J.C. acknowledgesa graduate fellowship from the Departmento f Education. A.A.G. acknowledges a Presidential Young Investigator Award with matchingf unds generouslyp rovided by Digital Instruments, Inc.. This investigation was supportedb y the US Departmento f Energy Grant No. DEFG02-91ER45439t hrought he Ma- terials ResearchL aboratory,U niversityo f Illinois at Urbana-Champaign.

PY - 1993/1/20

Y1 - 1993/1/20

N2 - 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.

AB - 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.

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U2 - 10.1016/0039-6028(93)90845-B

DO - 10.1016/0039-6028(93)90845-B

M3 - Article

AN - SCOPUS:0027168198

SN - 0039-6028

VL - 281

SP - L308-L314

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

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

Abstract

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