Oxygen-induced surface reconstructions on curved Ag(111)

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films, vol. 39

Abstract

The adsorption of oxygen and the resultant O-induced surface reconstructions are key components in heterogeneously catalyzed reactions on silver metal surfaces. O uptake and reconstructions on planar Ag(111) are well-characterized, and in this paper, we show that curved Ag(111) features similar O adsorption and reconstructions. Through a systematic scanning tunneling microscope study of a curved Ag(111) single crystal exposed to gas-phase atomic oxygen at a temperature of 525 K, we observed Oad and, upon higher coverages, saw p(4×4) and p(4×5√3) reconstructions form on both the A-type and B-type steps. Exposures at low temperatures (< 500 K) resulted in the formation of subsurface oxygen and the appearance of a stripe pattern and amorphous phase on the surface. Upon heating, stable surface reconstructions were formed. Although the geometric arrangement of atoms along the steps were different, A-type and B-type steps formed the same reconstructions. In addition, the B-type steps also saw the formation of several different features atop the oxygen reconstructions.

Authors 7

1. Marie E. Turano Aachen

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Department of Chemistry and Biochemistry, Loyola University Chicago 1 , 1068 W. Sheridan Road, Chicago, Illinois 60660

   2Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

2. Ludo B. F. Juurlink Aachen Leiden Institute of Chemistry

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Leiden Institute of Chemistry, Leiden University 2 , P.O. Box 9502, 2300 RA Leiden, The Netherlands

   1Department of Chemistry and Biochemistry, Loyola University Chicago, 1068 W. Sheridan Road, Chicago, Illinois 60660

3. Maxwell Z. Gillum Aachen

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Department of Chemistry and Biochemistry, Loyola University Chicago 1 , 1068 W. Sheridan Road, Chicago, Illinois 60660

   2Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

4. Elizabeth A. Jamka Aachen

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Department of Chemistry and Biochemistry, Loyola University Chicago 1 , 1068 W. Sheridan Road, Chicago, Illinois 60660

   2Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

5. George Hildebrandt Aachen

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Department of Chemistry and Biochemistry, Loyola University Chicago 1 , 1068 W. Sheridan Road, Chicago, Illinois 60660

   2Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

6. Faith J. Lewis Aachen

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Department of Chemistry and Biochemistry, Loyola University Chicago 1 , 1068 W. Sheridan Road, Chicago, Illinois 60660

   2Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands

7. Daniel R. Killelea Aachen

   Leiden University · Loyola University Chicago

   Affiliation as printed

   Department of Chemistry and Biochemistry, Loyola University Chicago 1 , 1068 W. Sheridan Road, Chicago, Illinois 60660

   2Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands