Optical Properties of the Nafion Membrane with Colloidal Nanocrystals

Abstract

A Nafion–CdSe/CdS/ZnS colloidal nanocrystals molecular complex with the specific luminescence spectrum is produced by diffusion of colloidal CdSe/CdS/ZnS nanocrystals with the size of 8.8 ± 0.2 nm into a proton exchange membrane. Characteristic lines of the Cd, Zn, and C atoms are observed in the emission spectrum of the membrane with embedded CdSe/CdS/ZnS nanocrystals. The luminescence spectrum of the membrane with nanocrystals has additional intensity peaks that do not coincide with the spectral lines of the solvent and the membrane itself. The luminescence lines of the membrane with implanted nanocrystals have a higher intensity than the secondary emission peaks of the neat nanocrystals. Two additional absorption peaks are detected at the wavelengths of 415 and 490 nm. A new IR transmission peak at the wavenumber of 4676 cm^–1 (2138.5 nm) is found in the membrane kept in the toluene solution with nanocrystals.