In situ observation of carbon nanotube yarn during voltage application

•The CNT yarn during current flow was observed by TEM.•After starting current flow, rotation and cutting phenomena on the CNT yarn were confirmed.•Moreover, catalyst, which was used for CNT growth, was evaporated.•These phenomena occur due to resistive heating during current flow. Carbon nanotube (C...

Full description

Saved in:
Bibliographic Details
Published in:Micron (Oxford, England : 1993) England : 1993), 2015-07, Vol.74, p.30-34
Main Authors: Tokunaga, Tomoharu, Hayashi, Yasuhiko, Iijima, Toru, Uesugi, Yuki, Unten, Masaki, Sasaki, Katsuhiro, Yamamoto, Takahisa
Format: Article
Language:English
Subjects:
Current
In situ TEM
Nanotube
Voltage
Yarn
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The CNT yarn during current flow was observed by TEM.•After starting current flow, rotation and cutting phenomena on the CNT yarn were confirmed.•Moreover, catalyst, which was used for CNT growth, was evaporated.•These phenomena occur due to resistive heating during current flow. Carbon nanotube (CNT) yarns are fabricated by drawing (combined with spinning) from CNT forests and grown on a substrate. Three types of phenomena occur in these CNT yarns with increasing amounts of current: yarn rotation, catalyst evaporation, and breakage of the yarn. These phenomena result from the resistive heating occurring during the current flow, and have been observed in situ under vacuum by transmission electron microscopy. If these CNT yarns are applied to electronic circuits, the rotation and breakage may lead to circuit failure. However, catalyst evaporation is a useful method for purifying CNT yarns without additional treatments prior to yarn fabrication.
ISSN:0968-4328
1878-4291
DOI:10.1016/j.micron.2015.04.004