Growth of diameter-modulated single-walled carbon nanotubes through instant temperature modulation in laser-assisted chemical vapor deposition

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The diameter of individual single-walled carbon nanotubes (SWNTs) was successfully modulated along their axes by instant temperature control in a laser-assisted chemical vapor deposition (LCVD) process. SWNTs were grown using different temperature profiles to investigate the effects of temperature variation on their growth. Due to the inverse relationship between SWNT diameter and growth temperature, SWNTs with ascending diameters were obtained by reducing the LCVD temperature from high to low. The diameter-modulated SWNTs were grown across a pair of Mo electrodes to form field-effect transistors (FETs) for investigation of their electronic transport properties. Fabricated devices demonstrated properties similar to Schottky diodes, implying different bandgap structures at the ends of the SWNTs. Raman spectroscopy, transmission electron microscopy, and electronic transport characteristics were studied to investigate the influence of temperature variation on the structural and electronic characteristics of SWNTs.

Original languageEnglish (US)
Title of host publicationFundamentals of Low-Dimensional Carbon Nanomaterials
Pages61-67
Number of pages7
DOIs
StatePublished - 2011
Event2010 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 29 2010Dec 3 2010

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1284
ISSN (Print)0272-9172

Conference

Conference2010 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/29/1012/3/10

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Mahjouri-Samani, M., Zhou, Y. S., Xiong, W., Gao, Y., Mitchell, M., & Lu, Y. F. (2011). Growth of diameter-modulated single-walled carbon nanotubes through instant temperature modulation in laser-assisted chemical vapor deposition. In Fundamentals of Low-Dimensional Carbon Nanomaterials (pp. 61-67). (Materials Research Society Symposium Proceedings; Vol. 1284). https://doi.org/10.1557/opl.2011.644