Metal ion adsorption to Langmuir-Blodgett films monitored by the optical waveguide technique
| Autor: | Rashid G. Yusupov, Ludwig Brehmer, Sabine Woigk, Harald Knobloch, A. A. Rakhnyanskaya |
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| Rok vydání: | 1995 |
| Předmět: |
chemistry.chemical_classification
Range (particle radiation) Aqueous solution Chemistry Metals and Alloys Analytical chemistry Ether Surfaces and Interfaces Polymer Langmuir–Blodgett film Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion chemistry.chemical_compound Metal ion adsorption Materials Chemistry Molecule |
| Zdroj: | Thin Solid Films. 265:89-91 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/0040-6090(95)06601-2 |
| Popis: | We applied optical waveguide methods to monitor the metal ion adsorption to ultrathin organic films. As a metal ion-sensitive material we used a polymer with azacrown ether sidegroups which are highly selective to Cu 2+ cation complexation. Ultrathin films of this material were prepared by applying the Langmuir-Blodgett technique. When exposing such a multilayer structure to an aqueous Cu 2+ ion solution, the effective index of the propagating waveguide mode increases, indicating that the ions are complexed to the molecules of the ultrathin film structure. The prepared layered structure was sensitive to solutions with a concentration down to c ≈ 3 × 10 −7 M; the response time was in the range of τ = 20–30 min. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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