Vertical Alignment of Single-Walled Carbon Nanotubes on Nanostructure Fabricated by Atomic Force Microscope
Abstract
The mechanisms of SWCNTs behavior in the electrophoresis cells and the vertical alignment of SWCNTs by assistance of ultra sonication were investigated. The electro-deposition by AC voltage was accomplished to compare with the effect of DC voltage. When the combined electric field of DC and AC was applied, the clean and vertically aligned SWCNTs were deposited on a gold electrode with high density, which may contribute to applying SWCNTs as an electron emission sources in nanoelectronic devices. It was investigated that the catalytic metal nanoparticles are selectively deposited on a chemically-modified Si substrate by dipping method. Based on this method, the vertically aligned SWCNTs were successfully synthesized on a Fe-Mo/MgO/Si substrate using thermal CVD. It was found that the SWCNTs are vertically aligned on substrate by introducing the NH3 pretreatment process on catalytic metal nanoparticles. The diameter and the density of SWCNTs were controlled by adjusting the flowing rate of NH3 at the NH3 pretreatment process. Our experimental results offer possibility in the integration of SWCNTs into nanoelectronic devices.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2007
- Accession Number
- ADA473108
Entities
People
- Haiwon Lee
Organizations
- Hanyang University