Highly luminescent functionalized semiconductor nanocrystals for biological and physical applications
First Claim
1. A functionalized fluorescent nanocrystal probe comprised of:
- a fluorescent nanocrystal;
a coating material coating said fluorescent nanocrystal, said coating material being imidazole-based and further comprising a phosphine cross-linking compound; and
a molecular probe material operably bound to said coating material.
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Accused Products
Abstract
The present invention provides for detection apparatus with functionalized fluorescent nanocrystal compositions and methods for making and using these compositions in biological detection applications, material separations, and in the production of biosensors. The compositions are fluorescent nanocrystals coated with at least one coating material comprising ligands with functional groups or moieties with conjugated electrons and moieties for imparting solubility to 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.
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Citations
33 Claims
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1. A functionalized fluorescent nanocrystal probe comprised of:
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a fluorescent nanocrystal; a coating material coating said fluorescent nanocrystal, said coating material being imidazole-based and further comprising a phosphine cross-linking compound; and a molecular probe material operably bound to said coating material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for detecting a target species, the method comprising:
- exciting a complex formed by operably bonding a fluorescent nanocrystal to a target molecule to form a complex wherein said fluorescent nanocrystal includes a imidazole-based coating material, wherein said coating material is further comprised of a phosphine cross-linking compound; and
detecting the light emitted from said complex. - View Dependent Claims (22)
- exciting a complex formed by operably bonding a fluorescent nanocrystal to a target molecule to form a complex wherein said fluorescent nanocrystal includes a imidazole-based coating material, wherein said coating material is further comprised of a phosphine cross-linking compound; and
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23. A method for separating materials comprising:
- introducing a doped metal oxide fluorescent core/shell nanocrystal soluble in fluids with a surface energy of at least 35 dynes/cm into a system;
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 a doped metal oxide fluorescent core/shell nanocrystal soluble in fluids with a surface energy of at least 35 dynes/cm into a system;
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26. 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 comprised of an imidazole-based composition wherein said coated nanocrystal has a quantum yield of greater than 30% when excited with light.
- View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
Specification