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. A., Grattan, K. T. V., De La Rue, R. and 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)

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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:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:De La Rue, Professor Richard
Authors: Faruki, M. J., Ab Razak, M. Z., Azzuhri, S. R., Rahman, M. T., Soltanian, M. R. K., Brambilla, G., Rahman, B. M. A., Grattan, K. T. V., De La Rue, R., and Ahmad, H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Materials Express
Publisher:American Scientific Publishers
ISSN:2158-5849
ISSN (Online):2158-5857
Copyright Holders:Copyright © 2016 American Scientific Publishers
First Published:First published in Materials Express 6(6):501-508
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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