# US 2018/0022992 A1 · Methods for Encapsulating Nanocrystals and Resulting Compositions

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2018/0022992 A1
- Document ID: US20180022992A1
- Status: Published application
- Kind: A1
- Application number: 15/695,220
- Filed: 2017-09-05
- Published: 2018-01-25
- Earliest claimed: 2008-12-30
- Assignees: Nanosys, Inc.
- Applicants: Nanosys, Inc.
- Inventors: Robert S. DUBROW
- Web page: https://patentgrep.com/patent/US20180022992A1

## CPC

- C09K 11/56: containing sulfur
- B32B 37/144: {using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding (constructional features for tensioning B32B38/1825)}
- C09K 11/025: {non-luminescent particle coatings or suspension media}
- C09K 11/565: {with zinc cadmium}
- C09K 11/623: {with zinc or cadmium}
- C09K 11/70: containing phosphorus
- C09K 11/703: {with zinc or cadmium}
- C09K 11/883: {with zinc or cadmium}
- C23C 14/081: {of aluminium, magnesium or beryllium}
- C23C 14/083: {of refractory metals or yttrium}
- C23C 14/10: Glass or silica
- C23C 16/40: Oxides
- C23C 16/402: {Silicon dioxide}
- C23C 16/403: {of aluminium, magnesium or beryllium}
- C23C 16/405: {of refractory metals or yttrium}
- C23C 16/45555: {applied in non-semiconductor technology}
- B32B 37/18: involving the assembly of discrete sheets or panels only
- B32B 2307/412: Transparent
- B32B 2307/414: Translucent
- B32B 2315/08: Glass
- B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays
- Y10T 156/10: Methods of surface bonding and/or assembly therefor
- Y10T 428/24355: Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y10T 428/24562: Interlaminar spaces
- Y10T 428/24851: Intermediate layer is discontinuous or differential
- Y10T 428/2991: Coated
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention provides methods for hermetically sealing luminescent nanocrystals, as well as compositions and containers comprising hermetically sealed luminescent nanocrystals. By hermetically sealing the luminescent nanocrystals, enhanced lifetime and luminescence can be achieved.

## Claims

### Claim 1

A microsphere comprising:
a composition comprising:
luminescent core-shell nanocrystals; and
an inorganic layer covering each of the luminescent core-shell nanocrystals; and
a barrier layer, disposed on the inorganic layer, configured to hermetically seal the composition, wherein the barrier layer consists essentially of SiO2, TiO2, or Al2O3.

### Claim 2 (depends on 1)

The microsphere of claim 1, wherein the luminescent core-shell nanocrystals are separated from each other by the inorganic layer.

### Claim 3 (depends on 1)

The microsphere of claim 1, wherein the luminescent core-shell nanocrystals are selected from the group consisting of CdSe/ZnS, CdSe/CdS, and InP/ZnS.

### Claim 4 (depends on 1)

The microsphere of claim 1, wherein the luminescent core-shell nanocrystals are between about 1-10 nm in size.

### Claim 5 (depends on 1)

The microsphere of claim 1, wherein the inorganic layer comprises silicon.

### Claim 6 (depends on 1)

The microsphere of claim 1, wherein the inorganic layer comprises silica or titania.

### Claim 7

A method comprising:
forming a composition comprising:
luminescent core-shell nanocrystals coated with an inorganic layer, and
an inorganic layer covering each of the luminescent core-shell nanocrystals; and
disposing a barrier layer on the inorganic layer to hermetically seal the composition, wherein the barrier layer consists essentially of SiO2, TiO2, or Al2O3.

### Claim 8 (depends on 7)

The method of claim 7, wherein the luminescent core-shell nanocrystals are separated from each other by the inorganic layer.

### Claim 9 (depends on 7)

The method of claim 7, wherein the luminescent core-shell nanocrystals are selected from the group consisting of CdSe/ZnS, CdSe/CdS, and InP/ZnS.

### Claim 10 (depends on 7)

The method of claim 7, wherein the luminescent core-shell nanocrystals are between about 1-10 nm in size.

### Claim 11 (depends on 7)

The method of claim 7, wherein the inorganic layer comprises silicon.

### Claim 12 (depends on 7)

The method of claim 7, wherein the inorganic layer comprises silica or titania.

### Claim 13

A composition comprising:
luminescent core-shell nanocrystals;
a hydrophilic layer covering each of the luminescent core-shell nanocrystals; and
a hydrophobic layer, disposed on the hydrophilic layer, configured to hermetically seal the composition.

### Claim 14 (depends on 13)

The composition of claim 13, wherein the luminescent nanocrystals are between about 2-480 nm in size.