The authors investigate the sensing properties of single-walled carbon nanotubes (SWCNTs) films, which are used as nanostructured materials for chemical sensors onto three types of transducers using different principles of operation as surface acoustic waves (SAWs), quartz-crystal microbalance (QCM), and a standard silica optical fiber (SOF) for detection of volatile organic compounds at a room temperature. The sensing probes have been configured as 315- and 433-MHz SAW two-port resonator-based oscillator, 10-MHz QCM resonator, and SOF light-reflectometry-based system at a wavelength of 1310 nm. A nanocomposite film of SWCNTs embedded in a cadmium-arachidate matrix was deposited by Langmuir-Blodgett (LB) technique onto the SAW sensors. An LB multilayer of SWCNTs-onto-CdA buffer material was also deposited onto the QCM and SOF sensors. The experiments demonstrate that carbon-nanotubes acoustic and optical sensors are highly sensitive to a wide range of polar and nonpolar organic solvents up to a sub-ppm detection limit at a room temperature. © 2006 IEEE.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
Penza, M., Cassano, G., Aversa, P., Cusano, A., Consales, M., Giordano, M., & Nicolais, L. (2006). Acoustic and optical VOCs sensors incorporating carbon nanotubes. IEEE Sensors Journal, 6(4), 867 - 874. . https://doi.org/10.1109/JSEN.2006.877974