Singlet-oxygen sensitization by associates of methylene blue with colloidal Ag$_{2}$S quantum dots passivated by thioglycolic acid

Luminescence studies of singlet-oxygen photosensitization by methylene blue molecules in various solvents, as well as by hybrid associates of this dye with colloidal Ag$_{2}$S quantum dots with average sizes of 2.0, 2.4, and 2.7 nm, are performed. The conditions for simultaneous singlet-oxygen photosensitization and detection of the IR luminescence of colloidal Ag$_{2}$S quantum dots passivated by thioglycolic acid are determined.