Investigating the Catalytic Growth of Carbon Nanotubes with In Situ Raman Monitoring

Abstract

The objectives of this project were to identify the processes responsible for growth termination, creation and healing of defects, and chiral selectivity of single-walled carbon nanotubes, in order to develop strategies to increase nanotube length, improve the structural quality of samples, and improve the metallic semiconducting ratio of samples. Using in situ Raman measurements and scanning electron microscopy, we showed that reaction of the catalyst with support to form more refractor compounts can increase growth selectivity, showed that catalyst ripening, nanotube nucleation, and catalyst encapsulation can affect diameter and chirality, and showed that exposure to oxygen may be causing defects in growth.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2015
Accession Number
ADA621204

Entities

People

  • Benji Maruyama
  • Vincent Jourdain

Organizations

  • National Center for Scientific Research

Tags

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Carbon Nanotubes
  • Chemical Vapor Deposition
  • Chemistry
  • Crystal Structure
  • Diameters
  • Electron Microscopy
  • Fermi Levels
  • Fullerenes
  • Geometry
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Measurement
  • Microscopy
  • Raman Spectroscopy
  • Scanning Electron Microscopy

Readers

  • Nanocomposite Materials Science
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene