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 |
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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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