New materials and multidimensional cluster analysis for SAW chemical sensor arrays
- Sandia National Labs., Albuquerque, NM (United States)
- Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry
- 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
- Resource Relation:
- Conference: 1994 solid-state sensor and actuator workshop,Hilton Head, SC (United States),13-16 Jun 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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