Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/17849
| Title: | Fiber optic pH sensor with self-assembled polymer multilayer nanocoatings | Authors: | Shao, LY Yin, MJ Tam, HY Albert, J |
Issue Date: | 2013 | Source: | Sensors, Feb. 2013, v. 13, no. 2, p. 1425-1434 | Abstract: | A fiber-optic pH sensor based on a tilted fiber Bragg grating (TFBG) with electrostatic self-assembly multilayer sensing film is presented. The pH sensitive polymeric film, poly(diallyldimethylammonium chloride) (PDDA) and poly(acrylic acid) (PAA) was deposited on the circumference of the TFBG with the layer-by-layer (LbL) electrostatic self-assembly technique. The PDDA/PAA film exhibits a reduction in refractive index by swelling in different pH solutions. This effect results in wavelength shifts and transmission changes in the spectrum of the TFBG. The peak amplitude of the dominant spectral fringes over a certain window of the transmission spectrum, obtained by FFT analysis, has a near-linear pH sensitivity of 117 arbitrary unit (a.u.)/pH unit and an accuracy of ±1 a.u. (in the range of pH 4.66 to pH 6.02). The thickness and surface morphology of the sensing multilayer film were characterized to investigate their effects on the sensor's performance. The dynamic response of the sensor also has been studied (10 s rise time and 18 s fall time for a sensor with six bilayers of PDDA/PAA). | Keywords: | Fiber-optic sensor Layer-by-layer self-assembly Multilayer film pH sensor Tilted fiber Bragg grating |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Sensors | EISSN: | 1424-8220 | DOI: | 10.3390/s130201425 | Rights: | © 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). The following publication Shao, L.-Y.; Yin, M.-J.; Tam, H.-Y.; Albert, J. Fiber Optic pH Sensor with Self-Assembled Polymer Multilayer Nanocoatings. Sensors 2013, 13, 1425-1434 is available at Shao, L.-Y.; Yin, M.-J.; Tam, H.-Y.; Albert, J. Fiber Optic pH Sensor with Self-Assembled Polymer Multilayer Nanocoatings. Sensors 2013, 13, 1425-1434 |
| Appears in Collections: | Journal/Magazine Article |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Shao_Fiber_Optic_PH.pdf | 962.49 kB | Adobe PDF | View/Open |
Access
View full-text via PolyU eLinks 
Page views
109
Last Week
3
3
Last month
Citations as of May 28, 2023
Downloads
48
Citations as of May 28, 2023
SCOPUSTM
Citations
37
Last Week
1
1
Last month
0
0
Citations as of May 25, 2023
WEB OF SCIENCETM
Citations
29
Last Week
0
0
Last month
0
0
Citations as of May 25, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.