# US 2013/0153406 A1 · Methods of manufacturing metal oxide nanoparticles

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- Number: US 2013/0153406 A1
- Document ID: US20130153406A1
- Status: Published application
- Kind: A1
- Application number: 13/608,623
- Filed: 2012-09-10
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Electronics and Telecommunications Research Institute
- Inventors: Jiyoung Oh; SangChul Lim; Chul Am Kim
- Web page: https://patentgrep.com/patent/US20130153406A1

## CPC

- B01J 19/10: employing sonic or ultrasonic vibrations
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

Methods of manufacturing metal oxide nanoparticles are provided. The method uses a bubble generation ultrasonic synthesis method. A gas is injected into a metal oxide preliminary composition solution to promote length growth of nanoparticles. After a basic chemical species solution is mixed with the metal oxide preliminary composition solution, ultrasonic waves are applied to form a reactant. The reactant is refined to manufacture metal oxide nanoparticles. The nanoparticles may have excellent dispersibility and a uniform thin film may be formed by the nanoparticles.

## Claims

### Claim 1

A method of manufacturing metal oxide nanoparticles, comprising:
forming a metal oxide preliminary composition solution;
mixing the metal oxide preliminary composition solution with a basic chemical species solution to form a mixture solution;
applying ultrasonic waves to the mixture solution to form a reactant; and
removing a solvent of the reactant.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
injecting a gas into the metal oxide preliminary composition solution.

### Claim 3 (depends on 2)

The method of claim 2, wherein the gas includes oxygen, nitrogen, argon, or vapor.

### Claim 4 (depends on 1)

The method of claim 1, wherein the metal oxide preliminary composition solution is an alcohol-based solution including metal acetate, metal alkoxide, metal nitrade, metal halide, any hydrate thereof, or any combination thereof.

### Claim 5 (depends on 4)

The method of claim 4, wherein the metal acetate, metal alkoxide, metal nitrade, metal halide, any hydrate thereof, or any combination thereof has a molarity within a range of about 0.1M to about 1M in the alcohol-based solution.

### Claim 6 (depends on 1)

The method of claim 1, wherein the basic chemical species solution is a mixture of a basic chemical species and an alcohol-based solvent.

### Claim 7 (depends on 6)

The method of claim 6, wherein the basic chemical species includes LiOH, NaOH, KOH, NH4OH, Na2O2, any hydrate thereof, or any combination thereof.

### Claim 8 (depends on 1)

The method of claim 1, wherein the ultrasonic waves has a frequency within a range of about 30 kHz to about 100 kHz.

### Claim 9 (depends on 1)

The method of claim 1, wherein the ultrasonic waves has a power within a range of about 600 W to about 3000 W.

### Claim 10 (depends on 1)

The method of claim 1, wherein the solvent of the reactant is removed using a centrifuge method.