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The fluorescence quenching of CdSe/CdS core/shell quantum dots (QDs) with various shell thicknesses is investigated. Inducing aggregation of the core/shell QDs with the addition of NaCl shows that the fluorescence quenching efficiency decreases monotonically as the CdS shell thickness increases because of the reduced spectral overlap between the emission and absorption spectra. In addition, hybridization...
We investigate the fluorescence quenching phenomenon that water-soluble CdSe quantum dots exhibit upon aggregation. First, we synthesize the hydrophobic CdSe quantum dots and convert them water-soluble using surface-ligand exchange with mercaptoacetic acid. We then induce aggregation of CdSe quantum dots by adding electrolyte to suspension. To monitor the change in photochemical and physical properties...
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