Nanoparticle-polymer fluorescent composite and method of preparing the same

Patent metadata

Field	Value
Publication number	US-10689510-B2
Application number	US-201716099352-A
Country	US
Kind code	B2
Filing date	May 25, 2017
Priority date	Jun 20, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

Provided are a nanoparticle-polymer fluorescent composite and a method of preparing the same. The method includes preparing magnetite (Fe 3 O 4 ) nanoparticles, mixing the magnetite (Fe 3 O 4 ) nanoparticles, an organic polymer having an aliphatic carbon chain, and a solvent for dissolving the organic polymer to prepare a preliminary composite and drying the preliminary composite to form a nanoparticle polymer composite, and irradiating a pulse laser to the nanoparticle polymer composite to change the magnetite (Fe 3 O 4 ) nanoparticles to Wustite nanoparticles and providing conjugated polymer characteristics to the organic polymer.

First claim

What is claimed is:

1. A method of preparing a nanoparticle-polymer fluorescent composite, the method comprising:
preparing magnetite (Fe 3 O 4 ) nanoparticles;
mixing the magnetite (Fe 3 O 4 ) nanoparticles, an organic polymer having an aliphatic carbon chain, and a solvent for dissolving the organic polymer to prepare a preliminary composite and drying the preliminary composite to form a nanoparticle polymer composite; and
irradiating a pulse laser to the nanoparticle polymer composite to change the magnetite (Fe 3 O 4 ) nanoparticles to Wustite nanoparticles and providing conjugated polymer characteristics to the organic polymer.

2. The method as set forth in claim 1 , wherein:
the pulse laser is a pulse laser having a wavelength of 690 nanometers to 1040 nanometers.

3. The method as set forth in claim 1 , wherein:
the magnetite (Fe 3 O 4 ) nanoparticles are prepared by a polyol method, and
the magnetite (Fe 3 O 4 ) nanoparticles each have a diameter of 30 nanometers to 200 nanometers.

4. The method as set forth in claim 1 , wherein:
the irradiating a pulse laser is performed using a multiphoton confocal microscope.

5. The method as set forth in claim 1 , wherein:
the organic polymer includes at least one of poly(methyl methacrylate) (PMMA), polyvinylpyrrolidone (PVP), and polyvinyl chloride (PVC).

6. The method as set forth in claim 5 , wherein:
in the nanoparticle polymer composite, the PMMA to the magnetite (Fe 3 O 4 ) nanoparticles is 1:0.0002 to 1:0.02 based on weight.

7. A nanoparticle-polymer fluorescent composite comprising:
an organic polymer including Wustite nanoparticles and an aliphatic carbon chain, wherein:
the Wustite nanoparticles were phase-changed using a photothermal reaction from magnetite (Fe 3 O 4 ) nanoparticles by a pulse laser, and
the organic polymer has a backbone chain of conjugated polymer characteristics provided by the pulse laser.

8. The nanoparticle-polymer fluorescent composite as set forth in claim 7 , wherein:
the magnetite (Fe 3 O 4 ) nanoparticles each have a diameter of 30 nanometers to 200 nanometers, and
the organic polymer includes at least one of poly(methyl methacrylate) (PMMA), polyvinylpyrrolidone (PVP), and polyvinyl chloride (PVC).

Assignees

• Univ Korea Res & Bus Found

Inventors

• Kim Young Keun
• Kim Yu Jin
• Park Bum Chul

Classifications

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C08K2201/003

  Additives being defined by their diameter · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• C09K2211/187

  of the iron group metals, i.e. Fe, Co or Ni · CPC title