Percolation of two-dimensional multiwall carbon nanotube networks

Heon Sang Lee; Chang Hun Yun; Sun Kug Kim; Ji Hoon Choi; Cheol Jin Lee; Hyoung Joon Jin; Hyunjung Lee; Sang Joon Park; Min Park

doi:10.1063/1.3238326

Percolation of two-dimensional multiwall carbon nanotube networks

Heon Sang Lee
, Chang Hun Yun
, Sun Kug Kim
, Ji Hoon Choi
, Cheol Jin Lee
, Hyoung Joon Jin
, Hyunjung Lee
, Sang Joon Park
, Min Park

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

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.

Original language	English
Article number	134104
Journal	Applied Physics Letters
Volume	95
Issue number	13
DOIs	https://doi.org/10.1063/1.3238326
Publication status	Published - 2009

Bibliographical note

Funding Information:
This study was supported by research grants from the Ministry of Knowledge Economy through the Materials and Component Technology Development Program. HSL thanks Professor W. N. Kim for his advice on this work.

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3238326

Cite this

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title = "Percolation of two-dimensional multiwall carbon nanotube networks",

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.",

author = "Lee, \{Heon Sang\} and Yun, \{Chang Hun\} and Kim, \{Sun Kug\} and Choi, \{Ji Hoon\} and Lee, \{Cheol Jin\} and Jin, \{Hyoung Joon\} and Hyunjung Lee and Park, \{Sang Joon\} and Min Park",

note = "Funding Information: This study was supported by research grants from the Ministry of Knowledge Economy through the Materials and Component Technology Development Program. HSL thanks Professor W. N. Kim for his advice on this work.",

year = "2009",

doi = "10.1063/1.3238326",

language = "English",

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journal = "Applied Physics Letters",

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AU - Lee, Heon Sang

AU - Yun, Chang Hun

AU - Kim, Sun Kug

AU - Choi, Ji Hoon

AU - Lee, Cheol Jin

AU - Jin, Hyoung Joon

AU - Lee, Hyunjung

AU - Park, Sang Joon

AU - Park, Min

N1 - Funding Information: This study was supported by research grants from the Ministry of Knowledge Economy through the Materials and Component Technology Development Program. HSL thanks Professor W. N. Kim for his advice on this work.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

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U2 - 10.1063/1.3238326

DO - 10.1063/1.3238326

M3 - Article

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SN - 0003-6951

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 134104

ER -

Percolation of two-dimensional multiwall carbon nanotube networks

Abstract

Bibliographical note

ASJC Scopus subject areas

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