Controlled growth of ultranarrow nanowires on functionalized 2D materials

Patent metadata

Field	Value
Publication number	US-11008658-B2
Application number	US-201916288577-A
Country	US
Kind code	B2
Filing date	Feb 28, 2019
Priority date	Feb 28, 2018
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A method for preparing a nanowire or nanorod on a patterned monolayer or thin film supported by a 2D material substrate in a nonpolar environment comprises the steps of: functionalizing a supporting 2D material substrate using a patterned monolayer or thin film of a polymerized amphiphiles comprising both hydrophobic and hydrophilic constituents; and then growing a nanowire or nanorod on the functionalized supporting 2D material substrate in a salt solution or suspension, wherein the patterned monolayer or thin film comprises a polymerizable phospholipid with a terminal amine. A gold nanowire or nanorod so prepared has a highly controlled diameter of about 2 nm, and a length of about 100 nm, dependent in part on molecular domain sizes in the monolayer.

First claim

What is claimed is:

1. A method for preparing a nanowire or nanorod on a non-covalently functionalized supporting 2D material substrate comprising the steps of
a. preparing a supporting 2D material substrate;
b. functionalizing said supporting 2D material substrate by preparing a monolayer or thin film comprising the step of assembling a polymerizable amphiphile comprising both hydrophobic and hydrophilic constituents on said supporting 2D material substrate, and then polymerizing said amphiphile to afford said monolayer or thin film;
c. preparing a salt solution or suspension; and
d. growing a nanowire or nanorod by exposing the salt solution or suspension to said monolayer or thin film on said supporting 2D material substrate.

2. The method of claim 1 , wherein said salt is a metal salt.

3. The method of claim 2 , wherein said metal salt is a gold or silver salt.

4. The method of claim 1 , wherein said salt solution or suspension comprises a non-polar solvent or a mixture thereof.

5. The method of claim 1 , wherein said salt solution or suspension comprises a cyclohexane solvent mixed with oleylamine, triisopropylsilane and a gold salt.

6. The method of claim 5 , wherein said gold salt is HAuCl 4 .3H 2 O.

7. The method of claim 5 , wherein said cyclohexane solution comprises about 1-1000 mM of oleylamine.

8. The method of claim 5 , wherein said cyclohexane solution comprises about 10-1000 mM of triisopropylsilane.

9. The method of claim 5 , wherein said cyclohexane solution comprises about 0.1-10 mM of a gold salt.

10. The method of claim 1 , wherein said polymerization of an amphiphile monolayer or thin film is performed by irradiating with an UV light.

11. The method of claim 1 , wherein said supporting 2D material substrate is graphene, highly oriented pyrolytic graphite (HOPG), or a layered material of MoS 2 or WS 2 .

12. The method of claim 1 , wherein said polymerizable amphiphile is a lipid.

13. The method of claim 12 , wherein said lipid is a polymerizable phospholipid.

14. The method of claim 12 wherein said polymerizable amphiphile is a single-chain fatty amine or dual-chain phospholipid with a terminal amine.

15. The method of claim 14 , wherein said polymerizable single-chain amphiphile is 4,6-pentacosadiyneamine or 10,12-pentacosa-diynamine.

16. The method of claim 14 , wherein said dual-chain amphiphile is 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (diyne PC), 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphoethanolamine (diyne PE).

17. A method for preparing a nanowire or nanorod on a non-covalently functionalized supporting 2D material substrate comprising the steps of
a. preparing a supporting 2D material substrate;
b. functionalizing said supporting 2D material substrate by preparing a monolayer or thin film on said supporting 2D material substrate comprising the step of assembling a polymerizable amphiphile comprising both hydrophobic and hydrophilic constituents on said supporting 2D material substrate, and then polymerizing said amphiphile to afford said monolayer or thin film;
c. preparing a metal salt dissolved or dispersed in a nonpolar medium; and
d. growing a nanowire or nanorod by exposing the salt solution or suspension to said monolayer or thin film on said supporting 2D material substrate.

18. The method of claim 17 , wherein said metal salt is a silver or gold salt.

19. The method of claim 17 , wherein said supporting 2D material substrate is graphene, highly oriented pyrolytic graphite (HOPG), or a layered material such as MoS 2 or WS 2 .

Assignees

• Claridge Shelley A
• Porter Ashlin
• Purdue Research Foundation

Inventors

• Claridge Shelley A
• Porter Ashlin

Classifications

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C23C18/1882

  Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers · CPC title

• B05D1/208

  After-treatment of monomolecular films · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C23C18/44 Primary

  using reducing agents · CPC title