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Characterization of the Surface Area and Porosity of Sol-Gel Films Using Saw Devices

Published online by Cambridge University Press:  25 February 2011

Gregory C. Frye ,
Antonio J. Ricco ,
Stephen J. Martin  and
C. Jeffrey Brinker
Gregory C. Frye
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
Antonio J. Ricco
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
Stephen J. Martin
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
C. Jeffrey Brinker
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185
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Abstract

A novel technique for accurately obtaining nitrogen adsorption isotherms on thin porous films has been developed. These isotherms are useful for characterizing the surface area and pore size distribution of porous samples. The sensitivity to adsorbed nitrogen is increased by several orders of magnitude over conventional techniques by forming the test film on the substrate of a surface acoustic wave (SAW) device. This device functions as a microbalance able to detect less than 100 pg/cm2 of film. Surface areas and pore size distributions calculated from adsorption isotherms obtained with this technique on silicate sol-gel films are compared to those for bulk samples prepared from similar sol-gel solutions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 349
Copyright
Copyright © Materials Research Society 1988

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References

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