Adsorption Studies with a Graphite Fiber Microbalance

  • L. Bruschi
  • G. Torzo
Part of the NATO ASI Series book series (NSSB, volume 267)


The present work describes the graphite fiber microbalance, a sophisticated and powerful technique that we used to investigate the growth behavior of film adsorbed onto graphite. Our first result obtained with this method was the detection of a triple point wetting transition for argon1: here we report several improvements we introduced, during the last three years, both in the experimental set-up and in the data reduction procedure. This technique is in fact a rather recent acquisition in the field of experimental adsorption studies: a simpler and less accurate version was first used by C. Bartosh and S. Gregory in 1985 to investigate the oxygen adsorption close to the bulk triple temperature2, and later by P. Taborek and L. Senator3, and by G. Zimmerli and M.W. Chan4 to study the wetting transition in liquid helium. The improved version here described includes: 1) a detailed analysis of the effects due to the interaction of the oscillating probe with the vapor phase, 2) a different driving mechanism, 3) a sophisticated frequency-lock apparatus, and 4) a cell geometry optimized for reduction of the thermal gradients.


Resonant Frequency Data Reduction Procedure Volumetric Adsorption Resonant Frequency Measurement Stainless Steel Filling 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • L. Bruschi
    • 1
  • G. Torzo
    • 1
  1. 1.Dipartimento di Fisica - Università di PadovaIstituto Nazionale Fisica della MateriaPadovaItaly

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