Graphite intercalation compounds

JUL 01, 1978

Substances that diffuse into the interlayer spaces of graphite change its properties dramatically, leading both to potential practical applications and to interesting physical and chemical phenomena.

DOI: 10.1063/1.2995104

John E. Fischer

Thomas E. Thompson

Solid‐state physicists are turning more and more to complex synthetic materials in their search for novel phenomena and potentially useful properties. Many of these materials are highly anisotropic, so that interatomic interactions can for all practical purposes be neglected along one or two crystal axes. One of the oldest classes of prototype systems for exploring phenomena predicted to occur in two‐dimensional systems are graphite intercalation compounds. These consist of stacks of one or more layers of hexagonally arrayed carbon atoms, alternating with monolayers of guest atoms or molecules. Striking changes in the properties of both host and guest result from intercalation. In addition to their quasi‐two‐dimensional behavior, fundamental interest centers on their variable anisotropy, which results from the fact that the strength of the interlayer interactions depends on the nature of the intercalated species.

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More about the Authors

John E. Fischer. University of Pennsylvania.

Thomas E. Thompson. SRI International, Menlo Park, California.