Functionalized fluorescent nanocrystal compositions and methods of making
First Claim
1. A functionalized fluorescent core/shell nanocrystal comprised of:
- a fluorescent core/shell nanocrystal;
a coating material, said coating material being histidine-based.
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Abstract
The present invention provides for functionalized fluorescent nanocrystal compositions and methods for making these compositions. The compositions are fluorescent nanocrystals coated with at least one material. The coating material has chemical compounds or ligands with functional groups or moieties with conjugated electrons and moieties for imparting solubility to coated fluorescent nanocrystals in aqueous solutions. The coating material provides for functionalized fluorescent nanocrystal compositions which are water soluble, chemically stable, and emit light with a high quantum yield and/or luminescence efficiency when excited with light. The coating material may also have chemical compounds or ligands with moieties for bonding to target molecules and cells as well as moieties for cross-linking the coating. In the presence of reagents suitable for reacting to form capping layers, the compounds in the coating may form a capping layer on the fluorescent nanocrystal with the coating compounds operably bonded to the capping layer.
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Citations
48 Claims
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1. A functionalized fluorescent core/shell nanocrystal comprised of:
- a fluorescent core/shell nanocrystal;
a coating material, said coating material being histidine-based. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- a fluorescent core/shell nanocrystal;
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21. A method for detecting a target species, the method comprising:
- exciting a complex formed by operably bonding a fluorescent core/shell nanocrystal to a target molecule to form a complex wherein said fluorescent nanocrystal includes a histidine-based coating material; and
detecting the light emitted from said complex. - View Dependent Claims (22)
- exciting a complex formed by operably bonding a fluorescent core/shell nanocrystal to a target molecule to form a complex wherein said fluorescent nanocrystal includes a histidine-based coating material; and
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23. A method for separating materials comprising:
- introducing doped metal oxide fluorescent core/shell nanocrystal soluble in fluids being coated with the histidine-based coating material;
exciting said fluorescent nanocrystal to have a magnetic moment; and
utilizing a magnetic field for separating the doped metal oxide fluorescent nanocrystals with the induced magnetic moment. - View Dependent Claims (24, 25)
- introducing doped metal oxide fluorescent core/shell nanocrystal soluble in fluids being coated with the histidine-based coating material;
- 26. A functionalized fluorescent nanocrystal composition comprising a fluorescent core/shell nanocrystal, a histidine-based coating material, and a molecular probe wherein said fluorescent nanocrystals have a characteristic spectral emission which is enhanced by the coating material.
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31. A coated nanocrystal comprising:
- a core comprising a first semiconductor material, a shell layer deposited on the core comprising a second semiconductor material, a coating material deposited on said shell layer including a histidine-based composition coating material wherein said coated nanocrystal has a quantum yield of greater than 50% when irradiated with light.
- View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
Specification