Luminescent nanoparticles and methods for their preparation
First Claim
1. A luminescent nanoparticle prepared according to a method comprising the steps of:
- a) providing a semiconductive core;
b) admixing with the core i. a first shell precursor, ii. a second shell precursor, iii. a solvent and iv. an additive comprising an element selected from the group consisting of a Group 2 element, a Group 12 element, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element, Fe, Nb, Cr, Mn, Co, Cu, and Ni, to form a reaction dispersion; and
c) heating the reaction dispersion to a temperature for a period of time sufficient to induce formation of an inorganic shell on the semiconductive core.
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Abstract
Methods for synthesizing luminescent nanoparticles and nanoparticles prepared by such methods are provided. The nanoparticles are prepared by a method in which an additive is included in the reaction mixture. The additive may be a Group 2 element, a Group 12 element, a Group 13 element, a Group 14 element, a Group 15 element, or a Group 16 element. In additions, a luminescent nanoparticle is provided that comprises a semiconductive core surrounded by an inorganic shell, an interfacial region and an additive present in the interfacial region or both the interfacial region and the shell.
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Citations
33 Claims
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1. A luminescent nanoparticle prepared according to a method comprising the steps of:
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a) providing a semiconductive core;
b) admixing with the core i. a first shell precursor, ii. a second shell precursor, iii. a solvent and iv. an additive comprising an element selected from the group consisting of a Group 2 element, a Group 12 element, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element, Fe, Nb, Cr, Mn, Co, Cu, and Ni, to form a reaction dispersion; and
c) heating the reaction dispersion to a temperature for a period of time sufficient to induce formation of an inorganic shell on the semiconductive core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A luminescent nanoparticle prepared according to a method comprising the steps of:
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a) preparing a semiconductive core according to a method comprising adding a first amount of a first core precursor and a first amount of a second core precursor to form a reaction solution and reacting the first core precursor with the second core precursor under conditions which result in the formation of the semiconductive core and the presence of an amount of a first additive comprising unreacted first core precursor, second core precursor, or both first and second core precursor in the reaction solution;
b) heating the core to a temperature sufficient to induce formation of an inorganic shell on the core upon addition thereto of shell precursors;
c) admixing with the reaction solution a first shell precursor and a second shell precursor to form a reaction dispersion; and
d) maintaining the reaction dispersion at a temperature for a period of time sufficient to induce formation of an inorganic shell on the semiconductive core. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A luminescent nanoparticle prepared according to a method comprising the steps of:
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a) providing a semiconductive core;
b) heating the core to a temperature sufficient to induce formation of an inorganic shell on the core upon addition thereto of shell precursors c) admixing with the core i. a first shell precursor, ii. a second shell precursor, iii. a solvent and iv. an additive comprising an element selected from the group consisting of a Group 2 element, a Group 12 element, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element, Fe, Nb, Cr, Mn, Co, Cu, and Ni, to form a reaction dispersion; and
d) maintaining the temperature of the reaction dispersion at a temperature for a period of time sufficient to form an inorganic shell on the semiconductive core. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of preparing a luminescent nanoparticle comprising the steps of:
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a) providing a semiconductive core;
b) admixing with the core i. a first shell precursor, ii. a second shell precursor, iii. a solvent and iv. an additive comprising an element selected from the group consisting of a Group 2 element, a Group 12 element, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element, Fe, Nb, Cr, Mn, Co, Cu, and Ni, to form a reaction dispersion; and
c) heating the reaction dispersion to a temperature for a period of time sufficient to induce formation of an inorganic shell on the semiconductive core. - View Dependent Claims (29, 30, 31)
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32. A method of preparing a luminescent nanoparticle comprising the steps of:
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a) preparing a semiconductive core according to a method comprising adding a first amount of a first core precursor and a first amount of a second core precursor to form a reaction solution and reacting the first core precursor with the second core precursor under conditions which result in the formation of the semiconductive core and the presence of an amount of a first additive comprising unreacted first core precursor, second core precursor, or both the first and second core precursors in the reaction solution;
b) heating the core to a temperature sufficient to induce formation of an inorganic shell on the core upon addition thereto of shell precursors;
c) admixing with the reaction solution a first shell precursor and a second shell precursor to form a reaction dispersion; and
d) maintaining the reaction dispersion at a temperature for a period of time sufficient to induce formation of an inorganic shell on the semiconductive core. - View Dependent Claims (33)
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Specification