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Probing Surface Roughness and Porosity through Adsorption of Wetting Layers

Published online by Cambridge University Press:  15 February 2011

J. Krim  and
V. Panella
J. Krim
Affiliation:
Department of Physics, Northeastern University, Boston, MA 02115
V. Panella
Affiliation:
Department of Physics, Northeastern University, Boston, MA 02115
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Abstract

We have employed a quartz microbalance technique to record adsorption isotherms on silver and gold surfaces whose roughness has also been characterized by x-ray reflectivity or scanning tunneling microscopy. We observe strikingly different behavior for two different liquid adsorbates (oxygen and nitrogen), and attribute this to a difference in their surface tension. Our results demonstrate the impact that capillary condensation phenomena can have on the interpretation of adsorption data, particularly with regards to the fractal nature of the substrate. Valuable information on surface morphology can nonetheless be obtained from adsorption isotherms, if combined with alternate experimental techniques.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 366: Symposium N – Dynamics in Small Confining Systems , 1994 , 231
Copyright
Copyright © Materials Research Society 1995

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