Complete Quenching of CdSe Nanocrystal Photoluminescence by Single Dye Molecules


  • This work was supported through ARC DP Grant 0451651 and FF Grant 0561486. The authors thank Joel van Embden and Tich-Lam Nguyen for some QD samples and advice, as well as Lisa Smith for carrying out ICP measurements. Supporting Information is available online from Wiley InterScience or from the author.


original image

Quantitative energy transfer from CdSe nanocrystals to a single, conjugated organic dye is observed in the system shown. The energy transfer can be modulated by altering the surface chemistry of the CdSe nanocrystal. The ability of one dye molecule to capture the exciton energy from a semiconductor nanocrystal effectively enhances the absorption cross section of the dye.