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조승호

Cho, Seungho
Metal Oxide DEsign Lab.
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The reason for an upper limit to the height of spinnable carbon nanotube forests

Author(s)
Lee, JaegeunOh, EugeneKim, Hye-JinCho, SeunghoKim, TeawonLee, SunghyunPark, JunbeomKim, Hee JinLee, Kun-Hong
Issued Date
2013-10
DOI
10.1007/s10853-013-7494-3
URI
https://scholarworks.unist.ac.kr/handle/201301/22188
Fulltext
https://link.springer.com/article/10.1007%2Fs10853-013-7494-3
Citation
JOURNAL OF MATERIALS SCIENCE, v.48, no.20, pp.6897 - 6904
Abstract
The reason for the upper limit on the height of spinnable carbon nanotube (CNT) forests was studied. To analyze the differences between CNT forests with different heights, we synthesized CNT forests using different growth times (3, 6, 9, 12, 15, and 60 min). The height of the CNT forests increased from 260 mu m at 3 min to 1.7 mm at 60 min, and the spinnability decreased sharply after 9 min of growth, where a wavy morphology first appeared. Raman analysis of the CNT forest grown for 9 min showed that the intensity ratio of G-band to D-band at the upper region was 1.50 and that near the bottom was 1.14. We also found that the reaction termination process affected the spinnability of the CNT forests. Depending on the termination process, both spinnable and non-spinnable CNT forests could be selectively synthesized, because of the different morphologies in their lower regions. The results suggested that any wavy morphology produced due to a disturbance in growth conditions causes a loss of spinnability.
Publisher
SPRINGER
ISSN
0022-2461
Keyword
YARNSARRAYSGROWTHFIBER

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