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Title: Laser ablation for the synthesis of carbon nanotubes

Abstract

Single walled carbon nanotubes are produced in a novel apparatus by the laser-induced ablation of moving carbon target. The laser used is of high average power and ultra-fast pulsing. According to various preferred embodiments, the laser produces and output above about 50 watts/cm.sup.2 at a repetition rate above about 15 MHz and exhibits a pulse duration below about 10 picoseconds. The carbon, carbon/catalyst target and the laser beam are moved relative to one another and a focused flow of "side pumped", preheated inert gas is introduced near the point of ablation to minimize or eliminate interference by the ablated plume by removal of the plume and introduction of new target area for incidence with the laser beam. When the target is moved relative to the laser beam, rotational or translational movement may be imparted thereto, but rotation of the target is preferred.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1080305
Patent Number(s):
8317983
Application Number:
12/798,377
Assignee:
Jefferson Science Associates, LLC (Newport News, VA)
Patent Classifications (CPCs):
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Holloway, Brian C, Eklund, Peter C, Smith, Michael W, Jordan, Kevin C, and Shinn, Michelle. Laser ablation for the synthesis of carbon nanotubes. United States: N. p., 2012. Web.
Holloway, Brian C, Eklund, Peter C, Smith, Michael W, Jordan, Kevin C, & Shinn, Michelle. Laser ablation for the synthesis of carbon nanotubes. United States.
Holloway, Brian C, Eklund, Peter C, Smith, Michael W, Jordan, Kevin C, and Shinn, Michelle. Tue . "Laser ablation for the synthesis of carbon nanotubes". United States. https://www.osti.gov/servlets/purl/1080305.
@article{osti_1080305,
title = {Laser ablation for the synthesis of carbon nanotubes},
author = {Holloway, Brian C and Eklund, Peter C and Smith, Michael W and Jordan, Kevin C and Shinn, Michelle},
abstractNote = {Single walled carbon nanotubes are produced in a novel apparatus by the laser-induced ablation of moving carbon target. The laser used is of high average power and ultra-fast pulsing. According to various preferred embodiments, the laser produces and output above about 50 watts/cm.sup.2 at a repetition rate above about 15 MHz and exhibits a pulse duration below about 10 picoseconds. The carbon, carbon/catalyst target and the laser beam are moved relative to one another and a focused flow of "side pumped", preheated inert gas is introduced near the point of ablation to minimize or eliminate interference by the ablated plume by removal of the plume and introduction of new target area for incidence with the laser beam. When the target is moved relative to the laser beam, rotational or translational movement may be imparted thereto, but rotation of the target is preferred.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {11}
}

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Works referenced in this record:

Production of high-density single-walled nanotube material by a simple laser-ablation method
journal, August 1998


Large-Scale Production of Single-Walled Carbon Nanotubes Using Ultrafast Pulses from a Free Electron Laser
journal, June 2002


Growth mechanisms for single-wall carbon nanotubes in a laser-ablation process
journal, May 2001