New materials and multidimensional cluster analysis for SAW chemical sensor arrays

Conference · Sun May 01 04:00:00 EDT 1994

OSTI ID:10151363

Ricco, A J; Osbourn, G C; Bartholomew, J W ^[1]; Crooks, R M; Chuanjing, Xu ^[2]; Allred, R E ^[3]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry
3. Adherent Technologies, Inc., Albuquerque, NM (United States)

We use six-element arrays of 97-MHz ST-quartz surface acoustic wave (SAW) devices to detect changes in thin-film mass and mechanical properties resulting from sorption of analytes by films representing two new classes of chemical sensor interface: self-assembled monolayers (SAMs) and plasma-grafted films (PGFs). While these materials do not display exceptional chemical selectivity, various combinations of the 7 different SAMs and 8 PGFs examined to produce distinct response patterns for each of 13 analytes. The analytes include aliphatic, aromatic, and chlorinated hydrocarbons; alcohols; ketones; organophosphonates; and water. Evaluation of the SAW array data using multidimensional cluster analysis techniques show that each chemical species can be correctly identified 100% of the time over the 9%- to 49%-of-saturation range using data from many combinations of four or more films.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10151363
• Report Number(s): SAND--94-0240C; CONF-9406166--1; ON: DE94012066; BR: GB0103012
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102
ADSORPTION
AROMATICS
CHEMICAL ANALYSIS
CHEMICAL AND SPECTRAL PROCEDURES
DETECTION
LAYERS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PATTERN RECOGNITION
QUARTZ
SOUND WAVES
SPECIFICITY
SUBSTRATES
THIN FILMS