Abstract

A method for manufacturing carbon nanotubes with an integrally attached outer graphitic layer is disclosed. The graphitic layer improves the ability to handle and manipulate the nanometer size nanotube device in various applications, such as a probe tip in scanning probe microscopes and optical microscopes, or as an electron emitting device. A thermal chemical vapor deposition reactor is the preferred reaction vessel in which a transition metal catalyst with an inert gas, hydrogen gas and a carbon-containing gas mixture are heated at various temperatures in a range between 500.degree. C. and 1000.degree. C. with gases and temperatures being adjusted periodically during the reaction times required to grow the nanotube core and subsequently grow the desired outer graphitic layer.

Document Type

Patent

Patent Number

US 7,011,884

Application Serial Number

10/424,336

Issue Date

3-14-2006

Current Assignee

UCFRF

Assignee at Issuance

UCFRF

College

College of Sciences

Department

Physics

Allowance Date

11-8-2005

Filing Date

4-25-2003

Assignee at Filing

UCFRF

Filing Type

Nonprovisional Application Record

Donated

no

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