Percolation of two-dimensional multiwall carbon nanotube networks

Title
Percolation of two-dimensional multiwall carbon nanotube networks
Authors
이헌상윤창훈김선국최지훈이철진진형준이현정박상준박민
Keywords
탄소나노튜브; 전도도; carbon nanotube
Issue Date
2009-10
Publisher
Applied physics letters
Citation
VOL 95, 134104-1-134104-3
Abstract
We highlight the significance of multiwall carbon nanotube (MWCNT) shape on the electrical percolation. For rodlike MWCNTs, percolation threshold depends on aspect ratio (L/d). For random coil-like MWCNTs, the percolation threshold does not depend on L/d but depends on the shape factor of MWCNTs represented by the ratio between static bending persistence length and diameter. Surface resistivities of various MWCNTs converge into single curve when we plot their dimensionless surface concentration versus surface resistivity. The surface resistivity of MWCNT films decrease with increasing temperature, particularly at low concentrations, indicating the films can be used as a negative temperature coefficient thermistor.
URI
http://pubs.kist.re.kr/handle/201004/36007
ISSN
0003-6951
Appears in Collections:
KIST Publication > Article
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