Journal
ANALYTICAL CHEMISTRY
Volume 83, Issue 9, Pages 3305-3311Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac1029902
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Funding
- National Science Foundation [ECCS-0601467, ECCS-0824017]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0824017] Funding Source: National Science Foundation
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The detection of volatile organic compounds (VOCs) in the gas phase by mass-sensitive disk microresonators is reported. The disk resonators were fabricated using a CMOS-compatible silicon micromachining process and subsequently placed in an amplifying feedback loop to sustain oscillation. Sensing of benzene, toluene, and xylene was conducted after applying controlled coatings of an analyte-absorbing polymer. An analytical model of the resonator's chemical sensing performance was developed and verified by the experimental data. Limits of detection for the analytes tested were obtained, modeled, and compared to values obtained from other mass-sensitive resonant gas sensors.
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