Laser-induced growth of diameter-modulated single-walled carbon nanotubes

M. Mahjouri-Samani, Y. S. Zhou, W. Xiong, M. Mitchell, Y. F. Lu

Research output: Contribution to conferencePaper

Abstract

Periodic diameter modulation of individual carbon nanotubes (CNTs) by rapid temperature variation in laser-assisted chemical vapor deposition (LCVD) process was successfully achieved. A CO2 laser was used to quickly and precisely modulate the growth temperature. Due to inverse relationship between the diameter of SWNTs and the growth temperature, tapered and diameter-alternating tubes were grown by modulating the CO2 laser power during the growth. The diameter-modulated SWNTs were grown across a pair of Mo electrodes to form field-effect transistors (FETs) for investigation of their electrical and optical properties. Variations in the bandgap of the individual semiconducting SWNTs were detected meaning the formation of multi bandgaps within a single tube. Transmission electron microscopy and Raman spectroscopy were also studied to investigate the structural and electronic properties of the structures.

Original languageEnglish (US)
Pages1222-1226
Number of pages5
DOIs
StatePublished - 2011
Event30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 - Orlando, FL, United States
Duration: Oct 23 2011Oct 27 2011

Conference

Conference30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011
CountryUnited States
CityOrlando, FL
Period10/23/1110/27/11

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Mahjouri-Samani, M., Zhou, Y. S., Xiong, W., Mitchell, M., & Lu, Y. F. (2011). Laser-induced growth of diameter-modulated single-walled carbon nanotubes. 1222-1226. Paper presented at 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States. https://doi.org/10.2351/1.5062206