Sorry, you need to enable JavaScript to visit this website.

Single-walled carbon nanotubes nanocomposite microacoustic organic vapor sensors

TitoloSingle-walled carbon nanotubes nanocomposite microacoustic organic vapor sensors
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2006
AutoriPenza, Michele, Tagliente M.A., Aversa Patrizia, Cassano Gennaro, and Capodieci Laura
RivistaMaterials Science and Engineering C
Parole chiaveacoustics, Carbon nanotubes, Langmuir Blodgett films, Microacoustic sensors, Nanocomposites, Nanostructured materials, SAW vapor sensors, Scanning electron microscopy, Sensors, Transmission electron microscopy, X ray diffraction analysis

We have developed highly sensitive microacoustic vapor sensors based on surface acoustic waves (SAWs) configured as oscillators using a two-port resonator 315, 433 and 915 MHz device. A nanocomposite film of single-walled carbon nanotubes (SWCNTs) embedded in a cadmium arachidate (CdA) amphiphilic organic matrix was prepared by Langmuir-Blodgett technique with a different SWCNTs weight filler content onto SAW transducers as nanosensing interface for vapor detection, at room temperature. The structural properties and surface morphology of the nanocomposite have been examined by X-ray diffraction, transmission and scanning electron microscopy, respectively. The sensing properties of SWCNTs nanocomposite LB films consisting of tangled nanotubules have been also investigated by using Quartz Crystal Microbalance 10 MHz AT-cut quartz resonators. The measured acoustic sensing characteristics indicate that the room-temperature SAW sensitivity to polar and nonpolar tested organic molecules (ethanol, ethylacetate, toluene) of the SWCNTs-in-CdA nanocomposite increases with the filler content of SWCNTs incorporated in the nanocomposite; also the SWCNTs-in-CdA nanocomposite vapor sensitivity results significantly enhanced with respect to traditional organic molecular cavities materials with a linearity in the frequency change response for a given nanocomposite weight composition and a very low sub-ppm limit of detection. © 2005 Elsevier B.V. All rights reserved.


cited By 22

Citation KeyPenza20061165