Granted Patent B2

US 11,327,036 · App. 16/996,239 · Granted May 10, 2022

Inventors: Gabriel Iftime (Dublin, CA); Clinton Smith (San Francisco, CA); David Eric Schwartz (San Carlos, CA); Yong Zhang (Millbrae, CA); Vedasri Vedharathinam (Sunnyvale, CA)

Assignee: Palo Alto Research Center Incorporated

G01N27/04B01J20/0225B01J20/205B01J20/3204B01J20/327G01N27/126G01N27/127G01N33/0009B22F1/102B22F2999/00B82Y15/00B82Y30/00B82Y40/00C22C2026/002

Abstract

Claims (25)

1. A composition comprising:

carbon nanotubes having an average degree of functionalization with carboxylic acid groups and/or hydroxyl groups that is less than 3 percent by weight (wt %) based on a total weight of the carbon nanotubes; and

polymer-coated metal nanoparticles bound to the carbon nanotubes, wherein the carbon nanotubes are not coated by polymer materials that coat the polymer-coated metal nanoparticles.

2. The composition of claim 1 , wherein the polymer-coated metal nanoparticles are non-covalently bound to the carbon nanotubes.

3. The composition of claim 1 , wherein the carbon nanotubes are substantially free of carboxylic acid functional groups and hydroxyl functional groups.

4. The composition of claim 1 , wherein the carbon nanotubes comprise single-walled carbon nanotubes or multi-wall carbon nanotubes.

5. The composition of claim 1 , wherein the polymer-coated metal nanoparticles each comprise a metallic core and a polymer layer covalently bound to the metallic core.

6. The composition of claim 5 , wherein the polymer layer comprises a hydrophobic polymer.

7. The composition of claim 5 , wherein the metallic core comprises a metal selected from a group consisting of palladium, iridium, rhodium, platinum, and gold.

8. The composition of claim 5 , wherein the polymer layer comprises poly(vinylpyrrolidinone), and wherein the metallic core comprises palladium.

9. The composition of claim 1 , wherein the composition is dispersed in an organic solvent.

10. The composition of claim 1 , wherein the polymer-coated metal nanoparticles are coated with a hydrophobic polymer layer.

11. The composition of claim 1 , wherein the carbon nanotubes are substantially free of carboxylic acid functional groups and hydroxyl functional groups.

12. The composition of claim 1 , wherein the carbon nanotubes comprise single-walled carbon nanotubes or multi-wall carbon nanotubes.

13. A composition comprising:

carbon nanotubes having an average degree of functionalization with carboxylic acid groups and/or hydroxyl groups that is less than 3 percent by weight (wt %) based on a total weight of the carbon nanotubes, and

polymer-coated metal nanoparticles bound to the carbon nanotubes, wherein the polymer-coated metal nanoparticles each comprise a metallic core, and a polymer layer is covalently bound to the metallic core.

14. A composition comprising:

carbon nanotubes having an average degree of functionalization with carboxylic acid groups and/or hydroxyl groups that is less than 3 percent by weight (wt %) based on a total weight of the carbon nanotubes; and

polymer-coated metal nanoparticles bound to the carbon nanotubes, wherein the polymer-coated metal nanoparticles each comprise a metallic core, and a polymer layer is covalently bound to the metallic core, wherein the polymer layer comprises a hydrophobic polymer.

15. The composition of claim 14 , wherein the metallic core comprises a metal selected from a group consisting of palladium, iridium, rhodium, platinum, and gold.

16. The composition of claim 14 , wherein the polymer layer comprises poly(vinylpyrrolidinone), and wherein the metallic core comprises palladium.

17. The composition of claim 14 , wherein the composition is dispersed in an organic solvent.

18. The composition of claim 14 , wherein the carbon nanotubes are substantially free of carboxylic acid functional groups and hydroxyl functional groups.

19. The composition of claim 14 , wherein the carbon nanotubes comprise single-walled carbon nanotubes or multi-wall carbon nanotubes.

Assignments (9)

Continuity (2)