Self-assembling monolayers on saw devices for selective chemical detection
- Sandia National Labs., Albuquerque, NM (United States)
- New Mexico Univ., Albuquerque, NM (United States). Dept. of Chemistry
We have utilized gold-coated, 98-MHz surface acoustic wave (SAW) devices on ST-cut quartz substrates to monitor in real time the self assembly of organized alkanethiol monolayer films. The kinetics of assembly of these films indicate that the self-assembly process is dominated by the interaction between the thiol head group and the gold layer, rather than interactions between adjacent alkanethiol molecules. SAW devices modified with a self-assembled monolayer (SAM) of mercaptoundecanoic acid provide a response specific to the presence of organophosphonates (OPs) relative to water and a range of common volatile organic compounds (VOCs): the OP response is characteristic of increased mass loading of the device, while water and VOCs yield responses indicative of changes in the mechanical properties of the SAM film. 10 refs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 10153230
- Report Number(s):
- SAND--92-0095C; CONF-9206172--2; ON: DE92015935
- Country of Publication:
- United States
- Language:
- English
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