Resonant nonradiative energy transfer between close-packed PbS quantum dots is observed in continuous-wave and time-resolved fluorescence experiments. Samples of nominally a single dot size, and two dot sizes, were investigated. In both cases, the time-integrated fluorescence exhibits a substantial redshift compared to the emission from dots in solution, and energy transfer can be observed directly in spectrally resolved fluorescence transients.
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Clark et al. (2007) studied this question.
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