Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17849
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dc.contributorDepartment of Electrical Engineering-
dc.creatorShao, LY-
dc.creatorYin, MJ-
dc.creatorTam, HY-
dc.creatorAlbert, J-
dc.date.accessioned2014-12-19T07:07:00Z-
dc.date.available2014-12-19T07:07:00Z-
dc.identifier.urihttp://hdl.handle.net/10397/17849-
dc.language.isoenen_US
dc.publisherMolecular Diversity Preservation International (MDPI)en_US
dc.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/).en_US
dc.rightsThe 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, 1425-1434en_US
dc.subjectFiber-optic sensoren_US
dc.subjectLayer-by-layer self-assemblyen_US
dc.subjectMultilayer filmen_US
dc.subjectpH sensoren_US
dc.subjectTilted fiber Bragg gratingen_US
dc.titleFiber optic pH sensor with self-assembled polymer multilayer nanocoatingsen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1425en_US
dc.identifier.epage1434en_US
dc.identifier.volume13en_US
dc.identifier.issue2en_US
dc.identifier.doi10.3390/s130201425en_US
dcterms.abstractA 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).-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationSensors, Feb. 2013, v. 13, no. 2, p. 1425-1434-
dcterms.isPartOfSensors-
dcterms.issued2013-
dc.identifier.isiWOS:000315403300003-
dc.identifier.scopus2-s2.0-84875175464-
dc.identifier.pmid23348031-
dc.identifier.eissn1424-8220en_US
dc.identifier.rosgroupidr62713-
dc.description.ros2012-2013 > Academic research: refereed > Publication in refereed journalen_US
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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