{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,10]],"date-time":"2026-07-10T03:03:31Z","timestamp":1783652611946,"version":"3.55.0"},"reference-count":30,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2007,11,11]],"date-time":"2007-11-11T00:00:00Z","timestamp":1194739200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"name":"Interdepartmental Committee of Science and Technology, Spain","award":["TEC2006-12170\/MIC"],"award-info":[{"award-number":["TEC2006-12170\/MIC"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Sensors"],"published-print":{"date-parts":[[2008,1]]},"abstract":"<jats:p>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\u2010by\u2010layer electrostatic self\u2010assembled 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.<\/jats:p>","DOI":"10.1155\/2008\/142854","type":"journal-article","created":{"date-parts":[[2007,11,15]],"date-time":"2007-11-15T15:30:41Z","timestamp":1195140641000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Study and Optimization of Self\u2010Assembled Polymeric Multilayer Structures with Neutral Red for pH Sensing Applications"],"prefix":"10.1155","volume":"2008","author":[{"given":"Javier","family":"Goicoechea","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francisco J.","family":"Arregui","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jesus M.","family":"Corres","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ignacio R.","family":"Matias","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2007,11,11]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.1023\/B:SCIE.0000006877.45467.a7"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0079-6425(01)00009-3"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.120281"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.866986"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1080\/00018738500101801"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.277.5330.1232"},{"key":"e_1_2_6_7_2","unstructured":"http:\/\/www.nanosonic.com\/."},{"key":"e_1_2_6_8_2","doi-asserted-by":"crossref","unstructured":"LenahanK. M. LiuY. WangY.-X. andClausR. O. Electrostatic self-assembly processes for noncentrosymmetric thin films and devices 3675 Smart Structures and Materials 1999: Smart Materials Technologies March 1999 Newport Beach Calif USA 104\u2013112 Proceedings of SPIE https:\/\/doi.org\/10.1117\/12.352783.","DOI":"10.1117\/12.352783"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0925-4005(99)00232-4"},{"key":"e_1_2_6_10_2","first-page":"360","article-title":"Optical fiber humidity sensor with a fast response time using the ionic self-assembly method","volume":"83","author":"Arregui F. J.","year":"2000","journal-title":"IEICE Transactions on Electronics"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1109\/50.971687"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1109\/JSEN.2003.810109"},{"key":"e_1_2_6_13_2","doi-asserted-by":"crossref","unstructured":"ArreguiF. J. LatasaI. MatiasI. R. andClausR. O. 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