Tuning of vertically-aligned carbon nanotube diameter and areal density through catalyst pre-treatment.

@article{Nessim2008TuningOV,
  title={Tuning of vertically-aligned carbon nanotube diameter and areal density through catalyst pre-treatment.},
  author={Gilbert Daniel Nessim and A. John Hart and Jin Su Kim and Donatello Acquaviva and Jihun Oh and Caitlin D. Morgan and Matteo Seita and Jeffrey S Leib and Carl V. Thompson},
  journal={Nano letters},
  year={2008},
  volume={8 11},
  pages={
          3587-93
        }
}
By controlling the timing and duration of hydrogen exposure in a fixed thermal process, we tuned the diameters of carbon nanotubes (CNTs) within a vertically aligned film by a factor of 2, and tuned the areal densities by an order of magnitude. The CNT structure is correlated with the catalyst morphology, suggesting that while chemical reduction of the catalyst layer is required for growth, prolonged H2 exposure not only reduces the iron oxide and enables agglomeration of the Fe film, but also… CONTINUE READING
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