Plasmonic-magnetic bifunctional nanotubes for biological applications

Patent metadata

Field	Value
Publication number	US-9638639-B2
Application number	US-201414296134-A
Country	US
Kind code	B2
Filing date	Jun 4, 2014
Priority date	Jun 4, 2013
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

The present invention includes nanotubes or rods, methods and arrays using plasmonic-magnetic bifunctional nanotubes or rods comprising: one or more silica nanotubes or rods; one or more nanomagnets embedded in a portion of the silica nanotubes or rods; and plasmonic metal nanoparticles uniformly coating in or on at least a portion of the surface of the nanomagnets and the silica nanotubes surface-coated.

First claim

What is claimed is:

1. A method of making a plasmonic-magnetic nanocapsule comprising:
a) forming a silica nanotube comprising a magnetic material embedded within the silica nanotube, wherein the magnetic material comprises a segmented metallic rod, wherein the segmented rod comprises segments of silver or gold, and segments of nickel;
b) layering at least a portion of the outer surface of the silica nanotube with metallic nanoparticles;
to provide a plasmonic-magnetic nanocapsule.

2. The method of claim 1 , wherein the nanocapsule has a diameter from 100 nm to 0.01 cm.

3. The method of claim 1 , wherein the metallic rod is formed using electrodeposition.

4. The method of claim 1 , wherein the metallic rod comprises nickel or platinum.

5. The method of claim 1 , wherein the silica nanotube is formed by coating the metallic rod with amorphous silica.

6. The method of claim 5 , wherein the coating comprises orthosilicate hydrolysis.

7. The method of claim 1 , wherein the silica layer has a thickness from 100 nm to 1 μm.

8. The method of claim 1 , wherein the silica layer has a thickness from 70 nm to 150 nm.

9. The method of claim 1 , comprising coating the segmented metallic rod with amorphous silica followed by removing at least one segment.

10. The method of claim 9 , wherein the at least one segment of the metallic rod is removed by etching.

Assignees

• Univ Texas

Inventors

• Fan Donglei
• Xu Xiaobin

Classifications

• H01F1/0063

  in a non-magnetic matrix, e.g. granular solids (granular films H01F10/007) · CPC title

• B82Y15/00

  Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors · CPC title

• B82Y25/00

  Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance · CPC title

• G01N21/658 Primary

  enhancement Raman, e.g. surface plasmons · CPC title

• G01N33/5432

  Liposomes or microcapsules · CPC title