Effect of titanium dioxide (TiO₂) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement

Faruki, M. J., Ab Razak, M. Z., Azzuhri, S. R., Rahman, M. T., Soltanian, M. R. K., Brambilla, G., Rahman, B. M., Grattan, K. T. V., De La Rue, R. M. & Ahmad, H. (2016). Effect of titanium dioxide (TiO₂) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement. Materials Express, 6(6), pp. 501-508. doi: 10.1166/mex.2016.1342

[img]
Preview
Text - Accepted Version
Download (5MB) | Preview

Abstract

In this study, the sensitivity and the linearity of the un-coated and TiO2-coated microfiber knot resonator (MKR) have been analyzed. The MKR is very sensitive to humidity changes since its refractive index is strongly humidity dependent. As a result, shifts occur in the resonance wavelength and there are also changes in output power. The un-coated MKR showed a sensitivity of 1.3 pm/%RH, in terms of the resonance wavelength, and a sensitivity of 0.0626 dB/%RH for the transmitted output power. The sensitivity increased greatly after the deposition of a porous TiO2 nanoparticle coating on the MKR. The TiO2-coated MKR showed an improved sensitivity of 2.5 pm/%RH, with respect to the resonance wavelength, and 0.0836 dB/%RH for the transmitted output power. This MKR sensor has the potential for use in a variety of humidity sensing applications.

Item Type: Article
Uncontrolled Keywords: fiber sensor; humidity sensor; microfiber knot resonator; tapered fiber; titanium dioxide (tio2)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/17239

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics