期刊
NANO LETTERS
卷 8, 期 11, 页码 3587-3593出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl801437c
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资金
- MARCO Interconnect Focus Center
- Intel Fellowship
- Fannie and John Hertz Foundation Fellowship
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [819762] Funding Source: National Science Foundation
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 H-2 exposure not only reduces the iron oxide and enables agglomeration of the Fe film, but also leads to catalyst coarsening. Control of this coarsening process allows tuning of CNT characteristics.
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