Single-walled carbon nanotubes (SWNTs) are of significant interest in the electronic materials research community due to their excellent electrical properties and many promising applications. However, SWNTs grow as mixture of both metallic and semiconducting tubes and this heterogeneity frustrates their practical use in high performance electronics. Recently developed purification techniques based on nanoscale thermocapillary flow of thin film overcoats enables complete elimination of metallic SWNTs from as-grown arrays. We studied the thermocapillary flow to purify SWNTs analytically and established a simple scaling law for the film thickness profile in terms of the geometry (e.g., film thickness), material (e.g., thermal conductivity and viscosity), and loading (e.g., power density) parameters. The results show that the normalized thickness profile only depends on one nondimensional parameter: the normalized power density. These findings may serve as useful design guidelines for process optimization.
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July 2015
Research-Article
Purification of Single-Walled Carbon Nanotubes Based on Thermocapillary Flow
Jizhou Song,
Jizhou Song
1
Department of Engineering Mechanics and
Soft Matter Research Center,
e-mail: jzsong@zju.edu.cn
Soft Matter Research Center,
Zhejiang University
,Hangzhou 310027
, China
e-mail: jzsong@zju.edu.cn
1Corresponding author.
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Chaofeng Lu,
Chaofeng Lu
Department of Civil Engineering and
Soft Matter Research Center,
Soft Matter Research Center,
Zhejiang University
,Hangzhou 310058
, China
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Sung Hun Jin,
Sung Hun Jin
Department of Electronic Engineering,
Incheon National University
,Incheon 406-772
, South Korea
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Simon N. Dunham,
Simon N. Dunham
Department of Materials Science and Engineering,
Frederick Seitz Materials Research Laboratory,
Frederick Seitz Materials Research Laboratory,
University of Illinois at Urbana-Champaign
,Urbana, IL 61801
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Xu Xie,
Xu Xie
Department of Materials Science and Engineering,
Frederick Seitz Materials Research Laboratory,
Frederick Seitz Materials Research Laboratory,
University of Illinois at Urbana-Champaign
,Urbana, IL 61801
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John A. Rogers,
John A. Rogers
Department of Materials Science and Engineering,
Frederick Seitz Materials Research Laboratory,
Frederick Seitz Materials Research Laboratory,
University of Illinois at Urbana-Champaign
,Urbana, IL 61801
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Yonggang Huang
Yonggang Huang
1
Department of Civil and Environmental Engineering,
Department of Mechanical Engineering,
Center for Engineering and Health, and
Skin Disease Research Center,
e-mail: y-huang@northwestern.edu
Department of Mechanical Engineering,
Center for Engineering and Health, and
Skin Disease Research Center,
Northwestern University
,Evanston, IL 60208
e-mail: y-huang@northwestern.edu
1Corresponding author.
Search for other works by this author on:
Jizhou Song
Department of Engineering Mechanics and
Soft Matter Research Center,
e-mail: jzsong@zju.edu.cn
Soft Matter Research Center,
Zhejiang University
,Hangzhou 310027
, China
e-mail: jzsong@zju.edu.cn
Chaofeng Lu
Department of Civil Engineering and
Soft Matter Research Center,
Soft Matter Research Center,
Zhejiang University
,Hangzhou 310058
, China
Sung Hun Jin
Department of Electronic Engineering,
Incheon National University
,Incheon 406-772
, South Korea
Simon N. Dunham
Department of Materials Science and Engineering,
Frederick Seitz Materials Research Laboratory,
Frederick Seitz Materials Research Laboratory,
University of Illinois at Urbana-Champaign
,Urbana, IL 61801
Xu Xie
Department of Materials Science and Engineering,
Frederick Seitz Materials Research Laboratory,
Frederick Seitz Materials Research Laboratory,
University of Illinois at Urbana-Champaign
,Urbana, IL 61801
John A. Rogers
Department of Materials Science and Engineering,
Frederick Seitz Materials Research Laboratory,
Frederick Seitz Materials Research Laboratory,
University of Illinois at Urbana-Champaign
,Urbana, IL 61801
Yonggang Huang
Department of Civil and Environmental Engineering,
Department of Mechanical Engineering,
Center for Engineering and Health, and
Skin Disease Research Center,
e-mail: y-huang@northwestern.edu
Department of Mechanical Engineering,
Center for Engineering and Health, and
Skin Disease Research Center,
Northwestern University
,Evanston, IL 60208
e-mail: y-huang@northwestern.edu
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received December 30, 2014; final manuscript received January 22, 2015; published online June 3, 2015. Assoc. Editor: Arun Shukla.
J. Appl. Mech. Jul 2015, 82(7): 071010 (4 pages)
Published Online: July 1, 2015
Article history
Received:
December 30, 2014
Revision Received:
January 22, 2015
Online:
June 3, 2015
Citation
Song, J., Lu, C., Hun Jin, S., Dunham, S. N., Xie, X., Rogers, J. A., and Huang, Y. (July 1, 2015). "Purification of Single-Walled Carbon Nanotubes Based on Thermocapillary Flow." ASME. J. Appl. Mech. July 2015; 82(7): 071010. https://doi.org/10.1115/1.4030330
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