Track membranes with embedded semiconductor nanocrystals: Structural and optical examinations

摘要

We studied the optical properties of poly(ethylene terephthalate) ion track membranes of 1.5, 0.5 and 0.05νmpores impregnated with luminescent semiconductor CdSe/ZnS nanocrystals of different diameters (2.5 and 5nm). The nanocrystals were embedded from their colloidal solutions in toluene by the immersion of a membrane in a colloidal solution. Localization of quasi-isolated weakly interacting CdSe/ZnS nanocrystals in a loosened layer on the track pore wall surface along with the existence of empty pores was demonstrated. We observed also the spatial separation of nanocrystals of 2.5 and 5nm in size along the 50nm pores.