Localized growth of suspended SWCNTs by means of an "all-laser" process and their direct integration into nanoelectronic devices

My Ali El Khakani, Ji Hyun Yi, Brahim Aissa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have successfully developed an "all-laser" processing for the localized growth of suspended single-wall carbon nanotubes (SWCNTs) on prepatterned SiO2/Si substrates. Our "all-laser" process stands out by its exclusive use of the same KrF excimer laser, first, to deposit the embedded-catalyst electrodes with a controllable architecture and, second, to grow SWCNTs through the pulsed laser ablation of a pure graphite target. Under the optimal growth conditions, the suspended SWCNTs are shown to bridge laterally adjacent electrodes separated by a gap of ∼ 2 μm. These SWCNTs (having diameters in the 1.25-1.64-nm range) generally tend to auto-assemble into bundles of ∼ 5-15 nm in diameter. The "all-laser" process here developed offers the advantage of a direct integration of the SWCNTs into field-effect-transistor-like devices with no postprocessing, thereby permitting the investigation of their electrical transport properties. Thus, the suspended SWCNT bundles are shown to behave collectively as an ambipolar transistor with ON/OFF switching ratios as high as ∼ 104.

Original languageEnglish
Pages (from-to)237-241
Number of pages5
JournalIEEE Transactions on Nanotechnology
Volume5
Issue number3
DOIs
Publication statusPublished - May 2006
Externally publishedYes

Fingerprint

Nanoelectronics
Carbon nanotubes
Lasers
Carbon nanotube field effect transistors
Electrodes
Excimer lasers
Laser ablation
Pulsed lasers
Transport properties
Transistors
Graphite
Deposits
Catalysts
Substrates
Processing

Keywords

  • "All-laser" processing
  • Carbon nanotubes (CNTs)
  • Field-effect transistor (FET)
  • Laser ablation
  • Nanodevices
  • Nanoelectronics
  • Nanotechnology

ASJC Scopus subject areas

  • Engineering(all)
  • Hardware and Architecture

Cite this

Localized growth of suspended SWCNTs by means of an "all-laser" process and their direct integration into nanoelectronic devices. / El Khakani, My Ali; Yi, Ji Hyun; Aissa, Brahim.

In: IEEE Transactions on Nanotechnology, Vol. 5, No. 3, 05.2006, p. 237-241.

Research output: Contribution to journalArticle

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