Microwave purification of large-area horizontally aligned arrays of single-walled carbon nanotubes

Xu Xie, Sung Hun Jin, Muhammad A. Wahab, Ahmad E. Islam, Chenxi Zhang, Frank Du, Eric Seabron, Tianjian Lu, Simon N. Dunham, Hou In Cheong, Yen-Chu Tu, Zhilin Guo, Ha Uk Chung, Yuhang Li, Yuhao Liu, Jong-Ho Lee, Jizhou Song, Yonggang Huang, Muhammad A. Alam, William L. Wilson and John A. Rogers ()
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Xu Xie: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Sung Hun Jin: Incheon National University
Muhammad A. Wahab: School of Electrical and Computer Engineering, Purdue University
Ahmad E. Islam: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Chenxi Zhang: University of Miami
Frank Du: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Eric Seabron: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Tianjian Lu: University of Illinois at Urbana-Champaign
Simon N. Dunham: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Hou In Cheong: University of Illinois at Urbana-Champaign
Yen-Chu Tu: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Zhilin Guo: University of Illinois at Urbana-Champaign
Ha Uk Chung: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Yuhang Li: Northwestern University
Yuhao Liu: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
Jong-Ho Lee: Seoul National University
Jizhou Song: Zhejiang University
Yonggang Huang: Northwestern University
Muhammad A. Alam: School of Electrical and Computer Engineering, Purdue University
William L. Wilson: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign
John A. Rogers: Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign

Nature Communications, 2014, vol. 5, issue 1, 1-11

Abstract: Abstract Recent progress in the field of single-walled carbon nanotubes (SWNTs) significantly enhances the potential for practical use of this remarkable class of material in advanced electronic and sensor devices. One of the most daunting challenges is in creating large-area, perfectly aligned arrays of purely semiconducting SWNTs (s-SWNTs). Here we introduce a simple, scalable, large-area scheme that achieves this goal through microwave irradiation of aligned SWNTs grown on quartz substrates. Microstrip dipole antennas of low work-function metals concentrate the microwaves and selectively couple them into only the metallic SWNTs (m-SWNTs). The result allows for complete removal of all m-SWNTs, as revealed through systematic experimental and computational studies of the process. As one demonstration of the effectiveness, implementing this method on large arrays consisting of ~20,000 SWNTs completely removes all of the m-SWNTs (~7,000) to yield a purity of s-SWNTs that corresponds, quantitatively, to at least to 99.9925% and likely significantly higher.

Date: 2014
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DOI: 10.1038/ncomms6332

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