SURFACE ENERGY STATES AND PHOTOLUMINESCENCE QUENCHING IN NANOSTRUCTURES BASED ON CdSe/ZnS QUANTUM DOT AND PORPHYRIN MOLECULE: ENSEMBLE AND SINGLE OBJECT DETECTION

摘要

It was found that the attachment of only one functionalized dye molecule on QD surface modifies not only the photoluminescence (PL) intensity but creates new energetically clearly distinguishable electronic states opening additional effective relaxation pathways stronger than Foerster resonant energy transfer (FRET). It was shown that surface properties of QDs are a complex interplay of the nature of the dye molecule and the topography of the ligand layer across the temperature range of 77-290 K.