Reversible Photoinduced Luminescence Modulation from Nanospheres Containing CdSe/ZnS Quantum Dots and Photochromic Diarylethene
A. Scherbovich, С. А. Маскевич, P. V. Karpach, Gennady T. Vasilyuk, V. I. Stsiapura, О. V. Venidiktova, A. O. Ayt, V. А. Barachevsky, Artur A. Khuzin, Airat R. Tuktarov, Mikhail Artemyev
Abstract
We prepared for the first time photoactive colloidal nanospheres consisting of hydrophobic CdSe/ZnS core–shell quantum dots encapsulated in an amphiphilic PMAT polymeric shell containing photochromic diarylethene DAE1 with stoichiometry of ∼6 dye molecules per single quantum dot. The UV-induced photoisomerization of DAE1 molecules results in the partial quenching of the quantum dot emission due to FRET from the quantum dot to DAE1 photoisomer with its absorption band spectrally overlapped with the quantum dot emission. The modulation of the quantum dot emission is reversible under cyclic UV–vis-induced open–closed photoisomerization of DAE1.