Real-Time Characterization of Electrospun PVP Nanofibers as Sensitive Layer of a Surface Acoustic Wave Device for Gas DetectionReportar como inadecuado




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Journal of Nanomaterials - Volume 2014 2014, Article ID 243037, 8 pages -

Research Article

Instituto de Tecnologías Físicas y de la Información ITEFI, Consejo Superior de Investigaciones Científicas CSIC, Serrano 144, 28006 Madrid, Spain

Instituto de Microelectrónica de Barcelona, CSIC, Campus UAB, 08193 Bellaterra, Spain

Received 11 October 2013; Revised 21 January 2014; Accepted 23 January 2014; Published 13 March 2014

Academic Editor: Sheng-Joue Young

Copyright © 2014 D. Matatagui et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The goal of this work has been to study the polyvinylpyrrolidone PVP fibers deposited by means of the electrospinning technique for using as sensitive layer in surface acoustic wave SAW sensors to detect volatile organic compounds VOCs. The electrospinning process of the fibers has been monitored and RF characterized in real time, and it has been shown that the diameters of the fibers depend mainly on two variables: the applied voltage and the distance between the needle and the collector, since all the electrospun fibers have been characterized by a scanning electron microscopy SEM. Real-time measurement during the fiber coating process has shown that the depth of penetration of mechanical perturbation in the fiber layer has a limit. It has been demonstrated that once this saturation has been reached, the increase of the thickness of the fibers coating does not improve the sensitivity of the sensor. Finally, the parameters used to deposit the electrospun fibers of smaller diameters have been used to deposit fibers on a SAW device to obtain a sensor to measure different concentrations of toluene at room temperature. The present sensor exhibited excellent sensitivity, good linearity and repeatability, and high and fast response to toluene at room temperature.





Autor: D. Matatagui, M. J. Fernández, J. P. Santos, J. Fontecha, I. Sayago, M. C. Horrillo, I. Gràcia, and C. Cané

Fuente: https://www.hindawi.com/



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