IP Library › Granted Patent US 12,692,398
Granted Patent B2
US 12,692,398 · App. 18/247,960 · Granted Jul 28, 2026

Magnetically tunable plasmon coupling of nanoshells enabled by space-free confined growth

Inventors: Yadong Yin (Riverside, CA); Zhiwei Li (Riverside, CA)
Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
C09C3/006B22F1/103B22F1/18C08K9/10C09C1/24C09C3/066C09C3/10G01N21/31H01F1/01B22F2301/255B22F2302/25B22F2303/20B22F2998/10B82Y5/00B82Y15/00B82Y25/00B82Y40/00C01P2004/04C01P2004/34C01P2004/64C01P2006/42C08K2201/01C08K2201/011
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Quick Facts
Patent No.
US 12,692,398
App. No.
18/247,960
Filed
Apr 5, 2023
Granted
Jul 28, 2026
Kind
B2
Art Unit
1736
USPC
423/632
Abstract

A method of forming magnetic/plasmonic hybrid structures is disclosed. The method includes synthesizing colloidal magnetic nanoparticles; modifying the magnetic nanoparticles in a solution of a polymeric ligand; binding metal seed nanoparticles to the surface of the magnetic nanoparticles; and performing a seed-mediated growth on the metal seed nanoparticles by reducing a metal salt in solution to form the magnetic/plasmonic hybrid structures.

Claims (30)

1 . A method of forming magnetic/plasmonic hybrid structures comprising:

synthesizing colloidal magnetic nanoparticles;

modifying the magnetic nanoparticles in a solution of a polymeric ligand;

binding metal seed nanoparticles to the surface of the magnetic nanoparticles;

performing a seed-mediated growth on the metal seed nanoparticles by reducing a metal salt in solution to form the magnetic/plasmonic hybrid structures; and

coating the magnetic nanoparticles containing surface-attached metal seed nanoparticles with a polymer shell of resorcinol-formaldehyde resin prior to performing the seed-mediated growth.

2 . The method according to claim 1 , further comprising:

removing the resorcinol-formaldehyde coating from the plasmonic structures after the seed-mediated growth.

3 . The method according to claim 1 , wherein the polymeric ligand is polyethyleneimine (PEI).

4 . The method according to claim 1 , wherein the magnetic nanoparticles comprise iron oxide.

5 . The method according to claim 4 , wherein the iron oxide is Fe 3 O 4 .

6 . The method according to claim 1 , wherein the metal seed nanoparticles comprises gold, silver, or copper.

7 . The method according to claim 1 , wherein the metal salt comprises salt of gold, silver, or copper.

8 . The method according to claim 1 , further comprising:

controlling the synthesizing of the colloidal particles to a width from 10 nm to 150 nm.

9 . The method according to claim 1 , further comprising:

utilizing the plasmonic structure in a biomedical application.

10 . A method of forming magnetic/plasmonic hybrid structures comprising:

synthesizing colloidal magnetic nanoparticles;

modifying the magnetic nanoparticles in a solution of a polymeric ligand;

binding metal seed nanoparticles to the surface of the magnetic nanoparticles;

performing a seed-mediated growth on the metal seed nanoparticles by reducing a metal salt in solution to form the magnetic/plasmonic hybrid structures; and

mediating and confining the seeded growth of the metal on the magnetic nanoparticles with the polymeric ligand, the polymeric ligand forming a deformable and permeable polymer shell on the magnetic nanoparticles that suppresses a deposition of metal atoms and limit growth of the metal atoms along a radial direction.

11 . A method of forming magnetic/plasmonic hybrid structures comprising:

synthesizing colloidal magnetic nanoparticles;

modifying the magnetic nanoparticles in a solution of a polymeric ligand;

binding metal seed nanoparticles to the surface of the magnetic nanoparticles;

performing a seed-mediated growth on the metal seed nanoparticles by reducing a metal salt in solution to form the magnetic/plasmonic hybrid structures, and

wherein the magnetic/plasmonic hybrid structures comprises a plurality of the magnetic/plasmonic hybrid structures, further comprises:

magnetically assembling the plurality of the magnetic/plasmonic hybrid structures into plasmonic chains in an active transparent display or an anti-counterfeiting device.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 5, 2023
From: YIN, YADONG; LI, ZHIWEI
To: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Reel/Frame 063231/0249 →
Continuity (2)
Provisional Application 63089765 · Oct 9, 2020
Related Publication 20230383124A1 · Nov 30, 2023
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