Journal
NANO LETTERS
Volume 9, Issue 10, Pages 3470-3476Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl901679q
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Funding
- Israel Science Foundation Converging Technologies program [1104107]
- ERC-Starting [207441]
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Multiple excitations in core/shell CdSe/CdS-seeded nanorods of different core diameters are studied by quasi-cw multiexciton spectroscopy and envelope function theoretical calculations. For core diameters below 2.8 nm, a transfer from binding to repulsive behavior is detected for the biexciton, accompanied by significant reduction of the triexciton oscillator strength. These characteristics indicate a transition of the electronic excited states from type-I localization in the core to a quasi-type-II delocalization along the entire rod as the core diameter decreases, in agreement with theoretical calculations.
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