Sorting out semiconducting single-walled carbon nanotube arrays by preferential destruction of metallic tubes using xenon-lamp irradiation

Yongyi Zhang, Yi Zhang, Xiaojun Xian, Jin Zhang, Zhongfan Liu

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

We report herein a simple and reliable approach to prepare densely packed, well-aligned individual semiconducting single-walled carbon nanotube (s-SWNT) arrays using long-arc xenon-lamp (Xe-lamp) irradiation. The densely packed, well-aligned individual SWNT arrays (the mean density was ∼20 tubes/μm) were first grown on a-plane sapphire using ethanol containing 3 wt % water as the carbon source. It is found that water plays a key role in the improvement of the density and the alignment of the SWNT arrays. The densely packed aligned SWNT arrays were then irradiated by a long-arc Xe lamp. Atomic force microscopy manipulation, Raman spectroscopy, and electrical transport measurement revealed that the SWNTs with small diameters (d < 1 nm) and the metallic SWNTs (m-SWNTs) in the arrays can be preferentially destroyed, thus leaving s-SWNT arrays on the surface. In general, for the SWNTs with diameters in the region of 1.15-1.55 nm, the percentage of s-SWNTs increased from ca. 50% to 95% after 60 min of irradiation. In situ I - V measurement indicated that, with longer irradiation time, the on/off ratios of the field effect transistors fabricated by the as-grown SWNT arrays increased from below 10 to well above 2000. This change clearly indicated that the m-SWNTs were destroyed faster than the s-SWNTs.

Original languageEnglish (US)
Pages (from-to)3849-3856
Number of pages8
JournalJournal of Physical Chemistry C
Volume112
Issue number10
DOIs
StatePublished - Mar 13 2008
Externally publishedYes

Fingerprint

xenon lamps
Xenon
Single-walled carbon nanotubes (SWCN)
classifying
Electric lamps
Sorting
destruction
carbon nanotubes
Irradiation
tubes
irradiation
Arc lamps
Water
Aluminum Oxide
arc lamps
Field effect transistors
Sapphire
Raman spectroscopy
Atomic force microscopy
Ethanol

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Sorting out semiconducting single-walled carbon nanotube arrays by preferential destruction of metallic tubes using xenon-lamp irradiation. / Zhang, Yongyi; Zhang, Yi; Xian, Xiaojun; Zhang, Jin; Liu, Zhongfan.

In: Journal of Physical Chemistry C, Vol. 112, No. 10, 13.03.2008, p. 3849-3856.

Research output: Contribution to journalArticle

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