Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications

The characterization of nanostructured thin films is critical in the design and fabrication of optical sensors. Particularly, this work is a detailed study of the properties of layer-by-layer electrostatic self-assembled multilayer (LbL) structures fabricated using poly(allylamine hydrochloride) (PA...

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Main Authors: Javier Goicoechea, Francisco J. Arregui, Jesus M. Corres, Ignacio R. Matias
Format: Article
Language:English
Published: Hindawi Limited 2008-01-01
Series:Journal of Sensors
Online Access:http://dx.doi.org/10.1155/2008/142854
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spelling doaj-01e6a7b044be4b3fb6706b994a37d9692020-11-24T22:59:41ZengHindawi LimitedJournal of Sensors1687-725X1687-72682008-01-01200810.1155/2008/142854142854Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing ApplicationsJavier Goicoechea0Francisco J. Arregui1Jesus M. Corres2Ignacio R. Matias3Departamento de Ingeniería Eléctrica y Electrónica, Universidad Publica de Navarra, Campus Arrosadia, Pamplona 31006, SpainDepartamento de Ingeniería Eléctrica y Electrónica, Universidad Publica de Navarra, Campus Arrosadia, Pamplona 31006, SpainDepartamento de Ingeniería Eléctrica y Electrónica, Universidad Publica de Navarra, Campus Arrosadia, Pamplona 31006, SpainDepartamento de Ingeniería Eléctrica y Electrónica, Universidad Publica de Navarra, Campus Arrosadia, Pamplona 31006, SpainThe characterization of nanostructured thin films is critical in the design and fabrication of optical sensors. Particularly, this work is a detailed study of the properties of layer-by-layer electrostatic self-assembled multilayer (LbL) structures fabricated using poly(allylamine hydrochloride) (PAH) and Neutral Red (NR) as cations, and poly(acrylic acid) (PAA) as polyanion. These LbL films, due to the colorimetric properties of the NR, are suitable for sensor applications such as pH sensing in the physiological range. In the (PAH+NR/PAA) LbL structure, it has been observed a very important influence of the pH of the solutions in the properties of the resultant films. Different techniques such as spectroscopy and atomic force microscopy (AFM) are combined to characterize the films, and the results are analyzed showing coherence with previous works. The LbL structure is finally optimized and dramatically improved nanostructured films were fabricated, showing good sensing properties, short response times, and good stability.http://dx.doi.org/10.1155/2008/142854
collection DOAJ
language English
format Article
sources DOAJ
author Javier Goicoechea
Francisco J. Arregui
Jesus M. Corres
Ignacio R. Matias
spellingShingle Javier Goicoechea
Francisco J. Arregui
Jesus M. Corres
Ignacio R. Matias
Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications
Journal of Sensors
author_facet Javier Goicoechea
Francisco J. Arregui
Jesus M. Corres
Ignacio R. Matias
author_sort Javier Goicoechea
title Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications
title_short Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications
title_full Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications
title_fullStr Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications
title_full_unstemmed Study and Optimization of Self-Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications
title_sort study and optimization of self-assembled polymeric multilayer structures with neutral red for ph sensing applications
publisher Hindawi Limited
series Journal of Sensors
issn 1687-725X
1687-7268
publishDate 2008-01-01
description The characterization of nanostructured thin films is critical in the design and fabrication of optical sensors. Particularly, this work is a detailed study of the properties of layer-by-layer electrostatic self-assembled multilayer (LbL) structures fabricated using poly(allylamine hydrochloride) (PAH) and Neutral Red (NR) as cations, and poly(acrylic acid) (PAA) as polyanion. These LbL films, due to the colorimetric properties of the NR, are suitable for sensor applications such as pH sensing in the physiological range. In the (PAH+NR/PAA) LbL structure, it has been observed a very important influence of the pH of the solutions in the properties of the resultant films. Different techniques such as spectroscopy and atomic force microscopy (AFM) are combined to characterize the films, and the results are analyzed showing coherence with previous works. The LbL structure is finally optimized and dramatically improved nanostructured films were fabricated, showing good sensing properties, short response times, and good stability.
url http://dx.doi.org/10.1155/2008/142854
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