A one step method to produce ~10 nm hydrodynamic diameter water-soluble quantum dots by ligand exchange with a near monolayer of organosilane caps will be presented. The method cross-links the surface-bound silane ligands such that the samples are stable on the order of months under ambient conditions; furthermore, the samples retain a high quantum yield (60%) over this time. Several methods to functionalize aqueous QD dispersions with proteins and fluorescent dyes have been developed with reaction yields as high as 97%.

Near monolayer silane coated quantum dots

246th National Meeting (2013)

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