Journal
NANO LETTERS
Volume 11, Issue 8, Pages 3493-3498Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl202086b
Keywords
MUPPETS; multidimensional spectroscopy; picosecond spectroscopy; rate dispersion; power-law kinetics
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Funding
- National Science Foundation [CHE-0809306]
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The kinetics of electron trapping in CdSe nanoparticles are examined from 0.5 ps to 1.8 ns. The ensemble kinetics fit a slow power law, but two-dimensional measurements show that the decay of each nanoparticle is exponential. A model is proposed in which defect sites provide a gateway for surface trapping and are randomly distributed on the surface. The electric field from the particle's dipole moment creates the observed heterogeneity in rates.
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