Silver nanowires, methods of making silver nanowires, core-shell nanostructures, methods of making core-shell nanostructures, core-frame nanostructures, methods of making core-frame nanostructures

Patent metadata

Field	Value
Publication number	US-2018050324-A1
Application number	US-201715728619-A
Country	US
Kind code	A1
Filing date	Oct 10, 2017
Priority date	Sep 19, 2014
Publication date	Feb 22, 2018
Grant date	—

Abstract

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, embodiments of the present disclosure provide for silver nanowires, methods of making silver nanowires, core-shell nanostructures, methods of making core-shell nanostructures, core-frame nanostructures, methods of making core-frame nanostructures, and the like.

First claim

We claim at least the following:

1 . A structure, comprising:
a silver nanowire having a diameter of about 5 to 25 nm and an aspect ratio of about 500 to 5000.

2 . The structure of claim 1 , wherein the silver nanowire has a penta-twinned structure.

3 . The structure of claim 1 , wherein the silver nanowire has a transverse localized surface plasmon resonance peak below 400 nm.

4 . A method of making silver nanowires, comprising:
mixing a bromide ion solution with a solution including poly(vinyl pyrrolidone) and ethylene glycol to form a first mixture; mixing a silver precursor solution with the first mixture to form a second mixture; and heating the second mixture to about 150 to 170° C. to form the silver nanowires, wherein the silver nanowires have a diameter of about 5 to 25 nm and an aspect ratio of about 500 to 5000.

5 . The method of claim 4 , wherein the poly(vinyl pyrrolidone) has a molecular weight of about 1×10 6 g/mol to 1.5×10 6 g/mol.

6 . The method of claim 4 , wherein the bromide ion solution selected from the group consisting of: a LiBr solution, NaBr solution, KBr solution, RbBr solution, and CsBr solution.

7 . A structure comprising:
a core-shell nanostructure, wherein the core is a silver nanostructure, and wherein the shell is M that is selected from the group consisting of Au, Pd, Pt, a silver alloy, and a bimetallic or multi-metallic combination of these metals.

8 . The structure of claim 7 , wherein the silver nanostructure is selected from the group consisting of: a nanorod, a nanowire, a nano-sized polyhedron, and a nano-sized prism or thin plate.

9 . The structure of claim 7 , wherein the shell has a thickness of about one to ten atomic layers.

10 . The structure of claim 7 , wherein the silver alloy is M-Ag, wherein M is selected from the group consisting of Au, Pd, Pt, and Cu.

11 . The structure of claim 8 , wherein the nanowire has a diameter of about 5 to 25 nm and an aspect ratio of about 500 to 5000.

12 . The structure of claim 8 , wherein the nano-sized polyhedron has a length, a width, and a height of about 15 to 250 nm.

13 . A structure comprising:
a core-shell nanocube, wherein the core is a silver nanostructure, and wherein the shell is M that is selected from the group consisting of Au, Pd, Pt, a silver alloy, and a bimetallic or multi-metallic combination of these metals.

14 . The structure of claim 13 , wherein the shell has a thickness of about one to ten atomic layers.

15 . The structure of claim 13 , wherein the silver alloy is M-Ag, wherein M is selected from the group consisting of Au, Pd, Pt, and Cu.

16 . The structure of claim 13 , wherein the nanocube has a length, a width, and a height of about 15 to 250 nm.

Assignees

• Georgia Tech Res Inst

Inventors

• Qin Dong
• Xia Younan
• Yang Yin
• Li Jumei
• Sun Xiaojun
• Da Silva Robson Rosa
• Yang Miaoxin

Classifications

• B22F1/0553

  Complex form nanoparticles, e.g. prism, pyramid, octahedron · CPC title

• B22F1/0547

  Nanofibres or nanotubes · CPC title

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J35/55

  Cylinders or rings · CPC title

• B01J2235/15

  X-ray diffraction · CPC title