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Stereo-Tem Imaging of Sol-Gel Glass Surfaces

Published online by Cambridge University Press:  28 February 2011

George C. Ruben  and
Merrill W. Shafer
George C. Ruben
Affiliation:
Dept. of Biological Sciences, Dartmouth College, Hanover, NH 03755
Merrill W. Shafer
Affiliation:
IBM T. J. Watson Research Center, Box 218, Yorktown Heights, NY 10598
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Abstract

Sol-gel top and cross-fractured surfaces have been Pt-C replicated (9.7–11.3 Å thick) and carbon film backed (100–145 Å thick) and separated from the gel with an HF solution. Samples made from both base catalyzed LUDOX/Kasil mixtures and acid catalyzed alkoxides were studied with tilt series of 104 to 105 magnification TEM mlcrographs of the surface replicas. The LUDOX/Kasil gels contained spherical particles with a raspberry-like morphology and the acid catalyzed alkoxIdes are composed of densely packed filaments and no apparent particles. The smallest structural entity in both gels are Pt/C coated filaments (12–14Å) estimated to be 1.5–2.7 Å in width. The pore sizes were characterized in both gel types, though TEM pore measurements were only made on the LUDOX/Kasil gels.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 73: Symposium H – Better Ceramics Through Chemistry II , 1986 , 207
Copyright
Copyright © Materials Research Society 1986

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References

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