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 an output above about 50 watts/cm2 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:
- 1176217
- Patent Number(s):
- 7692116
- Application Number:
- 10/188,525
- Assignee:
- Jefferson Science Associates (Newport News, VA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
- DOE Contract Number:
- AC05-84ER40150
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2002 Jul 03
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
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., 2010.
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/1176217.
@article{osti_1176217,
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 an output above about 50 watts/cm2 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 = {2010},
month = {4}
}