Microsensors based on self-assembled cyclodextrin host thin-films for volatile organic compounds
- Los Alamos National Lab., NM (United States)
The ubiquitous use of volatile organic compounds in research and development as well as in manufacturing has resulted in an increasing need for real-time monitoring and characterization in the workplace environment. The authors present here a versatile chemical microsensor which can be employed to track and quantify the total organic concentration in a reversible manner. Molecular interaction between organic guests and self-assembled host mono/multilayers on the surfaces of 200 MHz surface acoustic wave (SAW) resonators is studied as a method of recognizing the presence of toxins. Two families of {open_quotes}bucket{close_quotes} molecules known as cyclodextrins and calixarenes were applied to native oxides on Si(100) and ST-cut quartz resonators using molecular self-assembly techniques. The formation of the covalently-bound functionalized bucket monolayers on oxide surfaces was characterized by polarized, variable-angle, internal attenuated total reflection infrared spectroscopy and surface acoustic mass transduction. SAW sensors based on inclusion chemistry of these buckets were capable of detecting volatile organic compounds (VOCs) down to ppb levels. Pattern recognition with an array of complementary microsensors appears to be a viable approach for identifying and quantifying a particular VOC.
- OSTI ID:
- 441234
- Report Number(s):
- CONF-960782-; TRN: 96:006557-0005
- Resource Relation:
- Conference: 6. international meeting on chemical sensors, Gaithersburg, MD (United States), 22-25 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 6th international meeting on chemical sensors; PB: 313 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Self-assembled host monolayer based chemical microsensors for volatile organic compounds
Cyclodextrin-based microsensors for volatile organic compounds