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Type: 
Journal
Description: 
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.
Publisher: 
American Chemical Society
Publication date: 
14 Oct 2009
Authors: 

Amit Sitt, Fabio Della Sala, Gabi Menagen, Uri Banin

Biblio References: 
Volume: 9 Issue: 10 Pages: 3470-3476
Origin: 
Nano letters