# US 2013/0153831 A1 · Cerium (IV) Salts as Effective Dopant for Carbon Nanotubes and Graphene

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- Number: US 2013/0153831 A1
- Document ID: US20130153831A1
- Status: Published application
- Kind: A1
- Application number: 13/329,184
- Filed: 2011-12-16
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: International Business Machines Corporation
- Inventors: Ali Afzali-Ardakani; Bhupesh Chandra; George S. Tulevski
- Web page: https://patentgrep.com/patent/US20130153831A1

## CPC

- H01J 9/025: {of field emission cathodes}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- C01B 32/168: After-treatment
- H01J 1/304: Field-emissive cathodes
- H01J 2201/30453: Carbon types
- H01J 2201/30469: Carbon nanotubes (CNTs)
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}

## Abstract

A process comprises combining a Ce (IV) salt dissolved in a solvent comprising water with a carbon material comprising CNT or graphene wherein the Ce (IV) salt is selected from a Ce (IV) ammonium salt of a nitrogen oxide acid, Ce (IV) ammonium salt of a sulfur oxide acid, Ce (IV) salt of a lower alkyl organo sulfur acid, or Ce (IV) salt of a lower alkane organo sulfur acid. In one embodiment the Ce (IV) salt is selected from Ce (IV) ammonium nitrate, Ce (IV) ammonium sulfate, Ce (IV) lower alkyllsulfonate, or Ce (IV) trifluoro lower alkanesulfonate. A product is produced by this process. An article of manufacture comprises this product on a substrate.

## Claims

### Claim 1

A process comprising combining a Ce (IV) salt dissolved in a solvent comprising water with a carbon material comprising CNT or graphene wherein said Ce (IV) salt is selected from a Ce (IV) salt of a nitrogen oxide acid, Ce (IV) salt of a sulfur oxide acid, Ce (IV) salt of a lower alkyl organo sulfur acid, or Ce (IV) salt of a substituted lower alkane organo sulfur acid.

### Claim 2 (depends on 1)

The process of claim 1 wherein said salt comprises Ce (IV) ammonium nitrate, Ce (IV) ammonium sulfate, Ce (IV) lower alkyllsulfonate and Ce (IV) trihalo lower alkanesulfonate.

### Claim 3 (depends on 1)

The process of claim 1 wherein said Ce (IV) salt comprises Ce (IV) ammonium nitrate.

### Claim 4 (depends on 1)

The process of claim 1 wherein said Ce (IV) salt comprises Ce (IV) ammonium sulfate.

### Claim 5 (depends on 1)

The process of claim 1 wherein said Ce (IV) salt comprises Ce (IV) methylsulfonate.

### Claim 6 (depends on 1)

The process of claim 1 wherein said Ce (IV) salt comprises Ce (IV) trifluoromethanesulfonate.

### Claim 7 (depends on 1)

The process of claim 1 wherein said carbon material comprises a CNT.

### Claim 8 (depends on 1)

The process claim 1 wherein said carbon material comprises graphene.

### Claim 9 (depends on 1)

A product made by the process of claim 1.

### Claim 10 (depends on 7)

A product made by the process of claim 7.

### Claim 11 (depends on 8)

A product made by the process of claim 8.

### Claim 12 (depends on 9)

An article of manufacture comprising the product of claim 9 on a substrate.

### Claim 13 (depends on 10)

An article of manufacture comprising the product of claim 10 on a substrate.

### Claim 14 (depends on 11)

An article of manufacture comprising the product of claim 11 on a substrate.