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Optica Publishing Group
  • Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion
  • OSA Technical Digest (CD) (Optica Publishing Group, 2007),
  • paper JWC37
  • https://doi.org/10.1364/FIO.2007.JWC37

Periodic Intensity Fluctuations in Functionalized Semiconductor Quantum Dots: Correlation with Ligand Coverage

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Abstract

Fluorescence microscopy has been used in conjunction with atomic force microscopy to study size-correlated emission properties of single oligo-phenylene vinylene-functionalized CdSe nanocrystals. Intensity trajectories of these composite nanostructures exhibit well-defined temporal recurrence times, which we analyze using FFT techniques. Size correlation microscopy reveals a roughly linear dependence of recurrence period on nanostructure diameter, which we interpret in terms of varying degrees of surface functionalization. Characterization and control of such fluorescence fluctuations is critical to incorporation of such composite systems into photonic devices.

© 2007 APS

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