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Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology
Published on: December 7, 2015
Vertical alignment of carbon nanotubes using the magneto-evaporation method
Sang Cheon Youn1, Dae-Hwan Jung, Young Koan Ko
1Department of Chemical and Biomolecular Eng.(BK-21), Korea Advanced Institute of Science and Technology, Daejeon 305-701 Korea.
Journal of the American Chemical Society
|December 17, 2008
Summary
We developed a novel single-step method for vertically aligning single-walled carbon nanotubes (SWNTs) using a magnetic field and direct evaporation. This technique offers efficient, large-area alignment of high-aspect-ratio SWNTs at room temperature.
Area of Science:
- Materials Science
- Nanotechnology
- Physics
Background:
- Vertical alignment of single-walled carbon nanotubes (SWNTs) is crucial for advanced electronic and optical devices.
- Existing alignment methods often involve multiple steps, organic binders, or high temperatures.
Purpose of the Study:
- To develop a novel, single-step method for the simultaneous vertical alignment and fixation of SWNTs.
- To investigate the influence of process parameters on the degree of SWNT orientation.
Main Methods:
- Fabrication of Fe-oxide/SWNT samples using iron-oleate complex, oleic acid, and cut SWNTs in 1-octadecene.
- Dispersion of samples in N,N-dimethylformamide and deposition onto ITO glass via magnetic-field-assisted spraying.
- Direct evaporation of the SWNT solution in a magnetic field, followed by titanium e-beam evaporation for fixation.
Main Results:
- Achieved a high degree of vertically aligned SWNTs over a large area.
- Demonstrated that field strength, film thickness, and evaporation rate significantly influence SWNT orientation.
- Successfully aligned SWNTs at room temperature without organic binders or post-alignment procedures.
Conclusions:
- The developed single-step method provides an efficient and scalable approach for vertical alignment of SWNTs.
- This technique offers significant advantages for fabricating SWNT-based devices.
- The method shows potential applicability to other anisotropic materials with high aspect ratios.
