Abstract
Multilayered thin films containing poly(allylamine) (PAA) and brilliant yellow (BY) were prepared on a quartz slide by a layer-by-layer (LBL) deposition technique. The UV-visible spectra of the PAA/BY films were sufficiently changed depending upon the pH value of the solution in which the film was immersed. The response of the PAA/BY films was very fast (within a second) upon pH change from 9.0 to 5.0, while the response time was ca. 100 s upon pH change from 5.0 to 9.0.
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Egawa, Y., Hayashida, R. & Anzai, Ji. Multilayered Assemblies Composed of Brilliant Yellow and Poly(allylamine) for an Optical pH Sensor. ANAL. SCI. 22, 1117–1119 (2006). https://doi.org/10.2116/analsci.22.1117
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DOI: https://doi.org/10.2116/analsci.22.1117