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TDS Study of Potassium Adsorption on Al(111) and fivefold Al-Pd-Mn

Published online by Cambridge University Press:  17 March 2011

Barbara I. Wehner ,
James W. Anderegg ,
Cynthia J. Jenks ,
Amy R. Ross ,
Thomas A. Lograsso ,
Renee D. Diehl  and
Patricia A. Thiel
Barbara I. Wehner
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 50011.
James W. Anderegg
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 50011.
Cynthia J. Jenks
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 50011.
Amy R. Ross
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 50011.
Thomas A. Lograsso
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 50011.
Renee D. Diehl
Affiliation:
Penn State University, 104 Davey, University Park, PA 16802.
Patricia A. Thiel
Affiliation:
Ames Laboratory, Iowa State University, Ames, IA 50011.
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Abstract

We have used thermal desorption spectroscopy to carry out a comparative study of potassium adsorption on Al(111) and on the fivefold Al-Pd-Mn surface. Potassium adsorption on the quasicrystal was found to be different than on Al(111). The potassium monolayer desorbed from fivefold Al-Pd-Mn at lower temperatures than from Al(111). Potassium is known to form a dense monolayer on Al(111), with an ideal coverage of 0.33, but for the monolayer on fivefold Al Pd Mn we find that the saturation coverage is only one twelfth.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K11.4
Copyright
Copyright © Materials Research Society 2001

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