title: Multilayered assemblies composed of brilliant yellow and poly(allylamine) for an optical pH sensor.
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.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, Japan. egawa@neutron.pharm.tohoku.ac.jp
authors.forename: Yuya
authors.initials: Y
authors.lastname: Egawa
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Hayashida
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Anzai
mesh_terms: D001391:Azo Compounds / Q000737:chemistry / Q000494:pharmacology*; D001557:Benzenesulfonates / Q000737:chemistry / Q000494:pharmacology*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D011073:Polyamines / Q000737:chemistry*; D011791:Quartz; D013053:Spectrophotometry; D013499:Surface Properties; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D011073:Polyamines; D011791:Quartz; C063994:polyallylamine; C059622:Direct Yellow 4 dye