Semiconductor nanocrystals for time domain optical imaging
AssigneeNational Research Council of Canada
InventorsKui Yu, Abedelnasser Abulrob
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Abstract
A method of performing high repetition rate laser time domain imaging employs as fluoroprobes semiconductor nanocrystals having a fluorescence lifetime less than the laser pulse separation, typically less than 5 ns. The nanocrystals of the invention have a core/shell structure and may be surface treated to increase radiative decay. CdSe/Zns nanocrystals are particularly suitable.
Claims26
A method of performing high repetition rate laser time domain imaging, wherein semiconductor nanocrystals having a fluorescence lifetime less than the laser pulse separation are used as fluoroprobes.
A method of making fluoroprobes for use in high repetition laser time domain optical imaging, comprising synthesizing CdSe core/shell nanocrystals by a procedure selected from the group consisting of:
- the sequential addition of a mixture of Zn and S precursors into CdSe quantum dots in tri-n-octylphosphine alone and the sequential addition of a mixture of Zn and S precursors into CdSe nanocrystals in tri-n-octylphosphine and an amine.
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Semiconductor nanocrystals having a fluorescence lifetime less than 5 ns.
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Fluoroprobes comprising luminescent colloidal semiconductor nanocrystals with surface modification to increase the radiative decay rate.
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Dependencies are inferred from the claim text.