P2.3.6 An optical resonance sensor using silver nanoparticlesloaded films for monitoring human breathing

Event

14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany

Chapter

P2.3 Sensors Based on Optical Techniques

Author(s)

P. Rivero, A. Urrutia, J. Goicoechea, F. Arregui, I. Matías - Public University of Navarra (UPNA), Campus Arrosadia S/N (Spain)

Pages

1463 - 1466

DOI

10.5162/IMCS2012/P2.3.6

ISBN

978-3-9813484-2-2

Price

free

Abstract

This work is focused on the fabrication of a human breathing sensor based on in situ synthesis of silver nanoparticles (Ag NPs) inside a polymeric coating (LbL assembly) on an optical fiber core. The Ag-NPs were created using a synthesis protocol consisting of a loading step of the Ag+ cations into the polymeric film and a further reduction step using Dimethylamine Borane (DMAB). The Ag-NPs amount increases when the number of loading /reduction cycles is higher and therefore the refractive index of the overlay is also varied. This refractive index value makes possible the observation of a new resonant attenuation band which is known as lossy-moderesonance (LMR) found in the infrared region that could be used as sensing signal to monitor the human breathing.