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Correlation of SAW (Surface Acoustic Wave) Coating Responses with Solubility Properties and Chemical Structure Using Pattern Recognition.
Memorandum rept. Jun 85-Mar 86,
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
Twelve surface acoustic wave SAW device coatings were exposed to eleven chemical vapors and responses were correlated with solubility properties and coating structure to determine possible vaporcoating interaction mechanisms. Hydrogen bonding ability is implicated as a significant vaporcoating interaction mechanism. Pattern recognition schemes applied to the preliminary data aided in solubility propertyresponse correlations. Principal component analysis demonstrated good separation of different classes of chemical vapors tested. Hierarchical clustering provided additional evidence of the correlations between solubility properties and the observed clustering. In addition, pattern recognition methods were used to determine potential selectivity of an array detector using these coatings. Learning techniques show that one fourth of the sensors can adequately separate compounds of interest from chemically similar interferences.
APPROVED FOR PUBLIC RELEASE