ATOMIC LAYER DEPOSITION FOR FUNCTIONALIZING COLLOIDAL AND SEMICONDUCTOR PARTICLES
First Claim
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1. A method for preparing a functionalized nanocomposite, comprising:
- providing an atomic layer deposition (ALD) system;
providing a colloidal quantum dot array comprising a semiconductor material;
providing a first precursor reactive with the semiconductor material, the first precursor comprising at least one of a metal and a metal compound, and the first precursor selected to modify at least one of an electrical and an optical property of the colloidal quantum dot array; and
exposing the colloidal quantum dot array to the first precursor within the ALD system for a first period, thereby depositing a monolayer of the first precursor over at least a portion of the semiconductor material to form a nanocomposite comprising an inorganic surface disposed over at least a portion of the semiconductor material.
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Abstract
A method for producing a product of a functionalized nanocomposition colloidal material using atomic layer deposition to coat the colloidal material. The ALD layer comprises an inorganic material which enables improved optical and electrical properties for the nanocomposite.
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Citations
20 Claims
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1. A method for preparing a functionalized nanocomposite, comprising:
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providing an atomic layer deposition (ALD) system; providing a colloidal quantum dot array comprising a semiconductor material; providing a first precursor reactive with the semiconductor material, the first precursor comprising at least one of a metal and a metal compound, and the first precursor selected to modify at least one of an electrical and an optical property of the colloidal quantum dot array; and exposing the colloidal quantum dot array to the first precursor within the ALD system for a first period, thereby depositing a monolayer of the first precursor over at least a portion of the semiconductor material to form a nanocomposite comprising an inorganic surface disposed over at least a portion of the semiconductor material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10)
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8. The method of 1, wherein the electrical property is selected from the group consisting of:
- photoresponse, photoluminescence and index of refraction.
- View Dependent Claims (9)
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11. A functionalized nanocomposite having enhanced electro-optical properties comprising:
- a semiconductor nanocrystal substrate and an inorganic conformal film deposited over at least a portion of the substrate via monolayer deposition, the inorganic film comprising a metal, wherein the nanocomposite is characterized by an enhancement of at least one of an electrical property and an optical property relative to the respective electrical property and optical property of the semiconductor nanocrystal substrate.
- View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for enhancing an electro-optical property of a nanocrystal semiconductor, comprising:
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providing a nanocrystal semiconductor substantially free of interstitial contaminates; providing a first precursor, the first precursor comprising at least one of a gas-phase metal and a metal compound; providing a second precursor, the second. precursor selected to be reactive with the first precursor; depositing a substantially conforming layer comprising the first precursor onto the nanocrystal semiconductor; reacting the second precursor with the first precursor of the substantially conforming layer to form a nanocomposite structure comprising a nanocrystal semiconductor having an inorganic surface layer. - View Dependent Claims (18, 19, 20)
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Specification