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Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays
Published on: April 15, 2013
Vertical array growth of small diameter single-walled carbon nanotubes
Ya-Qiong Xu1, Erica Flor, Myung Jong Kim
1Department of Electrical & Computer Engineering, Rice University, MS-100, 6100 Main Street, Houston, Texas 77005, USA.
Journal of the American Chemical Society
|May 18, 2006
Summary
A novel hot filament chemical vapor deposition technique successfully grew vertical arrays of single-walled carbon nanotubes (SWNTs). This method utilizes high temperatures to activate carbon-containing gases, enabling controlled SWNT growth for advanced material applications.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Vertical arrays of single-walled carbon nanotubes (SWNTs) offer unique properties for various applications.
- Controlled synthesis of SWNTs with specific diameters and orientations remains a challenge.
Purpose of the Study:
- To develop and demonstrate a hot filament chemical vapor deposition (HFCVD) method for growing vertical array SWNTs.
- To characterize the structural and morphological properties of the synthesized SWNTs.
Main Methods:
- Utilized a hot filament (T > 2000°C) to activate hydrogen and carbon-containing gas mixtures at sub-atmospheric pressures.
- Employed iron-decorated silicon substrates placed in a preheated furnace for SWNT growth.
- Characterized the SWNT arrays using Raman spectroscopy, fluorescence spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM).
Main Results:
- Successfully synthesized vertical arrays of SWNTs with controlled diameters ranging from 0.78 to 1.6 nm.
- Demonstrated the efficacy of the HFCVD method in producing vertically aligned SWNT structures.
- Characterization confirmed the formation and quality of the SWNT arrays.
Conclusions:
- The developed HFCVD method is effective for producing vertical array single-walled carbon nanotubes.
- This technique provides a pathway for scalable synthesis of vertically aligned SWNTs for advanced applications.
- Further research can explore optimizing growth parameters for tailored SWNT properties.
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