Pulsed laser deposition-assisted patterning of aligned carbon nanotubes modified by focused laser beam for efficient field emission

Patterned carbon nanotube (CNT) arrays have been synthesized on patterned substrates created via pulsed laser deposition (PLD) of the precursor catalyst films with a mask. Arrays of CNTs in square and hexagonal patterns with tube lengths of 8 μm and 16 μm were created on silicon or quartz substrates...

Full description

Saved in:
Bibliographic Details
Published in:Carbon (New York) 2005-08, Vol.43 (10), p.2128-2133
Main Authors: Saurakhiya, N., Zhu, Y.W., Cheong, F.C., Ong, C.K., Wee, A.T.S., Lin, J.Y., Sow, C.H.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Field emission
Fullerenes and related materials
diamonds, graphite
Laser irradiation
Materials science
Physics
Scanning electron microscopy
Specific materials
Transmission electron microscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Patterned carbon nanotube (CNT) arrays have been synthesized on patterned substrates created via pulsed laser deposition (PLD) of the precursor catalyst films with a mask. Arrays of CNTs in square and hexagonal patterns with tube lengths of 8 μm and 16 μm were created on silicon or quartz substrates, respectively. Using the method of laser cutting, as-grown CNT patterns were pruned by focused He–Ne laser beam. It is found that after pruning, CNTs tend to cluster together and form welded junctions. The comparison of field emission properties of CNTs before and after pruning shows that laser modification of CNT morphologies effectively enhanced the emission currents.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2005.03.045