Related Experiment Video
Updated: May 31, 2026
Observation and Analysis of Blinking Surface-enhanced Raman Scattering
Published on: January 11, 2018
Blinking suppression and intensity recurrences in single CdSe-oligo(phenylene vinylene) nanostructures: experiment
K T Early1, K D McCarthy, N I Hammer
1George H Richason, Jr Chemistry Research Laboratory, Department of Chemistry, University of Massachusetts, Amherst, MA 01003, USA.
Abstract:
We report time-resolved single molecule fluorescence imaging of individual CdSe quantum dots that are functionalized with oligomeric conjugated organic ligands. The fluorescence intensity trajectories from these composite nanostructures display both a strong degree of blinking suppression and intensity fluctuations with characteristic recurrence times on the order of 10-60 s. In addition, fluorescence decay rate measurements of individual hybrid nanostructures indicate significantly modified non-radiative quantum dot decay rates relative to conventional ZnS-capped CdSe quantum dots. We show that a modified diffusive reaction coordinate model with slow fluctuations in quantum dot electron energies (1S(e), 1P(e)) can reproduce the experimentally observed behaviour.
