Research Article | 13-December-2017
An optical fibre sensor for detection of volatile organic compounds (VOCs) has been implemented. This device is based on a vapochromic material presented in the form of bright red powders, which suffers reversible changes in its optical properties when exposed to some organic vapours. The sensor head consists of a nano interferometer doped with the vapochromic material, built onto a cleaved ended multimode optical fibre by using the Layer by Layer Electrostatic Self Assembly Method (LbL). A
Cesar Elosua,
Ignacio R. Matias,
Candido Bariain,
Francisco J. Arregui
International Journal on Smart Sensing and Intelligent Systems, Volume 1 , ISSUE 1, 123–136
Article | 02-November-2017
ultra-thin coatings have been fabricated with the Layer-by-Layer (LbL) technique using different diameter SiO2 nanoparticles. These coatings were characterized to optimize their behavior and were applied to optical fiber substrates in order to create superhydrophilic optical interferometric cavities. These cavities show an optical response to Relative Humidity (RH) variations that are suitable for high performance sensing applications such as human-breathing monitoring.
Miguel Hernaez,
Ignacio R. Matias,
Jesus M. Corres,
Javier Goicoechea,
Javier Bravo,
Francisco J. Arregui
International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 1, 63–74
Article | 03-November-2017
using the Layer-by-Layer (LbL) technique. The refractive index of this polymeric coating is sensitive to changes in the external relative humidity (RH), which permits the fabrication of humidity sensors based on LMRs.The wavelength based fabricated sensors showed a dynamical range of 65 nm when the RH varied in the range from 20 to 80% and it has a good linearity when the RH is higher than 40%, high stability and are highly reproducible.
M. Hernaez,
C.R. Zamarreño,
I. Del Villar,
F.J. Arregui,
I.R. Matias
International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 4, 653–660
Article | 01-March-2012
In this work, it is presented a novel optical fiber humidity sensor based on silver nanoparticle-loaded polymeric coatings built onto an optical fiber core. The polymeric film was fabricated using the Layer-by-Layer assembly technique. The silver nanoparticles (Ag NPs) were characterized using transmission electron microscopy (TEM and UV-VIS spectroscopy. A Localized Surface Plasmon Resonance (LSPR) attenuation band is observed when the thickness of the coating increases, and showed a very good
Pedro J. Rivero,
Aitor Urrutia,
Javier Goicoechea,
Francisco J. Arregui,
Ignacio R. Matías
International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 1, 71–83
Article | 01-December-2016
This paper puts forward an algorithm of generating a constant CNC spiral path based on curved surface of triangular grid. This algorithm takes fully consideration of the geometry and dynamics characteristics of the cutter-path and triangular grid cell, effectively reducing numbers of cutter lifting and maintaining the continuity of the cutter-path. This algorithm starting biasing from the contact points of cutter on the boundary of profile curve of grid layer by layer and planning the contact
Yue-qi Guan,
Du Xu,
Han-qing Guan
International Journal on Smart Sensing and Intelligent Systems, Volume 9 , ISSUE 4, 2088–2110
Article | 01-June-2015
In this work, optical fiber refractometers based on the successive incorporation of gold nanoparticles have been fabricated by means of the Layer-by-Layer Embedding (LbL-E) deposition technique. This enables the apparition of two different optical phenomena, Localized Surface Plasmon Resonance (LSPR) and Lossy Mode Resonance (LMR). The absorption peaks related to both phenomena were captured during the fabrication process, showing a different evolution as a function of the resultant thickness
Pedro J. Rivero,
Miguel Hernaez,
Javier Goicoechea,
Ignacio R. Matías,
Francisco J. Arregui
International Journal on Smart Sensing and Intelligent Systems, Volume 8 , ISSUE 2, 822–841