Journal
NANOMATERIALS
Volume 9, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/nano9040571
Keywords
TiN; SWNT; AC-CVD; Mo-Co catalysts; field emission
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Funding
- Ministerio de Economia y Competitividad (MINECO) of Spain [ENE2014-57977-C2-1-R]
- U.S. Department of Defense [W911NF-14-1-0046]
- U.S. Department of Energy, through the Consortium for Integrating Energy Systems in Engineering and Science Education [DE-NA0003330]
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The goal of this research was to obtain high-density single-walled carbon nanotube forests (SWNTs) on conductive substrates for different applications, including field emission. For this, dip-coating was chosen as the catalyst deposition method, to subsequently grow SWNTs by Alcohol Catalytic Chemical Vapor Deposition (AC-CVD). Si (100) was chosen as the substrate, which was then coated with a TiN thin film. By sputtering with Ar, it was possible to generate alternating TiN and Si lanes, with a different wettability and, therefore, a different affinity for the catalysts. As a result, the Mo-Co catalyst was mainly deposited on TiN and not on sputtered-Si, which allowed the selective growth of SWNT forests on the TiN conductive surfaces. These as-synthesized SWNTs were used for field emission measurements in a high vacuum chamber.
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