Analytical Sciences

Abstract − Analytical Sciences, 22(8), 1117 (2006).

Multilayered Assemblies Composed of Brilliant Yellow and Poly(allylamine) for an Optical pH Sensor
Yuya EGAWA, Ryosuke HAYASHIDA, and Jun-ichi ANZAI
Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba, Sendai 980-8578, Japan
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.