Paper Info
Title
Hetero-core fiber optic humidity sensor with layer-by-layer polymer film including TiO2 nanoparticles using UV light
Abstract
We have developed a hetero-core structured fiber optic humidity sensor with a porous immobilized TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nano-particles. Our research group has been proposed the hetero-core optical fiber humidity sensor due to moisture absorption of the hygroscopic polymer based on optical-intensity modulation. However, the sensor had difficulty in detecting the humidity change at lower humidity range less than 50 %RH. In this paper, we present that the hetero-core fiber humidity sensor has devised to increase the sensitivity at relatively lower humidity by means of including the TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nano-particles in a porous sensitive film comparing to the conventional hetero-core fiber humidity sensor. On the other hand, a UV light has been known to make the TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nano-particles indicate super-hydrophilic reaction and photo catalytic effect. Therefore, the sensitivity of the humidity sensor can be improved using the sensitive film including the TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanoparticles illuminated by the UV light. We tested the transmitted spectra of UV and visible band light of the proposed hetero-core fiber humidity sensor. As a result, the UV-LED light source could enhance the humidity sensitivity in the proposed hetero-core fiber optic sensor.
Year
DOI
Venue
2015
10.1109/ICSensT.2015.7438415
2015 9th International Conference on Sensing Technology (ICST)
Keywords
DocType
ISSN
humidity mesurement,fiber optic sensor,hetero-core,TiO2-nano-particle,super-hydrophilic property
Conference
2156-8065
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Ryuji Okimuro100.34
Michiko Nishiyama2227.59
Ai Hosoki300.68
Kazuhiro Watanabe4248.31