# US 11,993,837 B2 · Particles for chemiresistor sensor

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

- Number: US 11,993,837 B2
- Document ID: US11993837B2
- Status: Granted
- Kind: B2
- Application number: 17/255,439
- Filed: 2019-05-26
- Published: 2021-08-26
- Granted: 2024-05-28
- Earliest claimed: 2018-06-25
- Assignees: Nanoscent Ltd.
- Applicants: NanoScent Ltd.
- Inventors: Yair Pasca; Eran Rom
- Web page: https://patentgrep.com/patent/US11993837B2

## CPC

- C22C 5/00: Alloys based on noble metals
- B22F 1/08: Metallic powder characterised by particles having an amorphous microstructure
- B22F 1/102: Metallic powder coated with organic material
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- G01N 27/127: {comprising nanoparticles}
- G01N 33/0027: {concerning the detector}
- B22F 2301/25: Noble metals, i.e. Ag Au, Ir, Os, Pd, Pt, Rh, Ru
- B22F 2302/25: Oxide
- B82Y 35/00: Methods or apparatus for measurement or analysis of nanostructures
- B82Y 40/00: Manufacture or treatment of nanostructures
- C22C 2200/02: Amorphous
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

The application discloses a particle for chemiresistor sensor. The particle may include: a nanoparticle core made from a conductive material selected from a group consisting of: Ir, Ir-alloy, IrOx, Ru, Ru-alloy, RuOx and any combination thereof and/or any conducting metallic oxide, having a cross section size of at most 100 nm; and a plurality of organic ligands bonded from one side to the nanoparticle core and capable of interacting with a volatile organic compound.

## Claims

### Claim 1

A particle for chemiresistor sensor, comprising:
a nanoparticle core made from a conductive material selected from a group consisting of: Ir, Ir-alloy, IrOx, Ru, Ru-alloy, RuOx and any combination thereof, having an average diameter of at most 100 nm; and
a plurality of organic ligands bonded from one side to the nanoparticle core and capable of interacting with a volatile organic compound.

### Claim 2 (depends on 1)

The particle of claim 1, wherein the nanoparticle core is at least partially covered with an oxide layer comprising at least one of: IrOx and RuOx.

### Claim 3 (depends on 2)

The particle of claim 2, wherein the organic ligands are selected from a group consisting of: Amine like Dodecylamine, Diazoniums, Silanes, Carboxylic Acids, Tri-chloro, methoxy, ethoxy, Tri hydroxide, di-chloro, chloro and any combination thereof.

### Claim 4 (depends on 1)

The particle according to claim 1, wherein the nanoparticle core has a crystalline structure.

### Claim 5 (depends on 1)

The particle according to claim 1, wherein the core has an amorphous structure.

### Claim 6 (depends on 1)

The particle according to claim 1, wherein the core has a mixed structure having a first material coated by a second material.

### Claim 7 (depends on 1)

The particle according to claim 1, wherein the first material is one of: Ir, Ir-alloy, Ru and Ru-alloy and the second material is one of IrOx and RuOx.

### Claim 8 (depends on 1)

A chemiresistor sensor comprising:
two electrodes; and
a sensing element electrically connected to the two electrodes and comprising a structure made from the particles according to claim 1.