Laser-induced nanoscale thermocapillary flow for purification of aligned arrays of single-walled carbon nanotubes

Frank Du, Jonathan R. Felts, Xu Xie, Jizhou Song, Yuhang Li, Matthew R. Rosenberger, Ahmad E. Islam, Sun Hun Jin, Simon N. Dunham, Chenxi Zhang, William L. Wilson, Yonggang Huang, William P. King, John A. Rogers

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Although aligned arrays of single-walled carbon nanotubes (SWNTs) have outstanding potential for use in broad classes of advanced semiconductor devices, the relatively large population of metallic SWNTs (m-SWNTs) that results from conventional growth techniques leads to significantly degraded performance. Recently reported methods based on thermocapillary effects that enable removal of m-SWNTs from such arrays offer exceptional levels of efficiency, but the procedures are cumbersome and require multiple processing steps. Here we present a simple, robust alternative that yields pristine arrays of purely semiconducting SWNTs (s-SWNTs) by use of irradiation with an infrared laser. Selective absorption by m-SWNTs coated with a thin organic film initiates nanoscale thermocapillary flows that lead to exposure only of the m-SWNTs. Reactive ion etching eliminates the m-SWNTs without damaging the s-SWNTs; removal of the film completes the purification. Systematic experimental studies and computational modeling of the thermal physics illuminates the essential aspects of this process. Demonstrations include use of arrays of s-SWNTs formed in this manner as semiconducting channel materials in statistically relevant numbers of transistors to achieve both high mobilities (>900 cm2 V-1 s-1) and switching ratios (>104). Statistical analysis indicates that the arrays contain at least 99.8% s-SWNTs and likely significantly higher.

Original languageEnglish
Pages (from-to)12641-12649
Number of pages9
JournalACS Nano
Volume8
Issue number12
DOIs
StatePublished - Jan 1 2014

Fingerprint

Single-walled carbon nanotubes (SWCN)
purification
Purification
carbon nanotubes
Lasers
lasers
Infrared lasers
Reactive ion etching
Semiconductor devices
Statistical methods
Transistors
Demonstrations
Physics
Irradiation
semiconductor devices
infrared lasers
statistical analysis
Processing
transistors
etching

Keywords

  • aligned array
  • carbon
  • infrared
  • laser
  • nanotube
  • purification
  • SWNT
  • TFT
  • thin-film transistor

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Du, F., Felts, J. R., Xie, X., Song, J., Li, Y., Rosenberger, M. R., ... Rogers, J. A. (2014). Laser-induced nanoscale thermocapillary flow for purification of aligned arrays of single-walled carbon nanotubes. ACS Nano, 8(12), 12641-12649. https://doi.org/10.1021/nn505566r

Laser-induced nanoscale thermocapillary flow for purification of aligned arrays of single-walled carbon nanotubes. / Du, Frank; Felts, Jonathan R.; Xie, Xu; Song, Jizhou; Li, Yuhang; Rosenberger, Matthew R.; Islam, Ahmad E.; Jin, Sun Hun; Dunham, Simon N.; Zhang, Chenxi; Wilson, William L.; Huang, Yonggang; King, William P.; Rogers, John A.

In: ACS Nano, Vol. 8, No. 12, 01.01.2014, p. 12641-12649.

Research output: Contribution to journalArticle

Du, F, Felts, JR, Xie, X, Song, J, Li, Y, Rosenberger, MR, Islam, AE, Jin, SH, Dunham, SN, Zhang, C, Wilson, WL, Huang, Y, King, WP & Rogers, JA 2014, 'Laser-induced nanoscale thermocapillary flow for purification of aligned arrays of single-walled carbon nanotubes', ACS Nano, vol. 8, no. 12, pp. 12641-12649. https://doi.org/10.1021/nn505566r
Du, Frank ; Felts, Jonathan R. ; Xie, Xu ; Song, Jizhou ; Li, Yuhang ; Rosenberger, Matthew R. ; Islam, Ahmad E. ; Jin, Sun Hun ; Dunham, Simon N. ; Zhang, Chenxi ; Wilson, William L. ; Huang, Yonggang ; King, William P. ; Rogers, John A. / Laser-induced nanoscale thermocapillary flow for purification of aligned arrays of single-walled carbon nanotubes. In: ACS Nano. 2014 ; Vol. 8, No. 12. pp. 12641-12649.
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