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Laser Synthesis of Single Wall Carbon Nanotubes

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Title: Laser Synthesis of Single Wall Carbon Nanotubes


1
Laser Synthesis of Single Wall Carbon Nanotubes
  • By Katie Chapin

2
Topics of Discussion
  • What is a Carbon Nanotube?
  • Functions of a Carbon Nanotube
  • Rochester Institute of Tech.
  • Experimental process
  • Laser Pattern
  • Proposed results for thesis
  • Outline for the semester

3
What is a Carbon Nanotube?
  • Hexagonal network of carbon atoms
  • Rolled up to form a cylinder
  • Capped ends
  • One nanometer wide by a few microns long
  • 50,000 times thinner than a human hair
  • Extremely strong
  • Stronger than steel per unit weight

4
Functions of a Carbon Nanotube
  • Storage
  • Hydrogen
  • Efficient light source
  • Semiconductor
  • High-strength capabilities

5
Rochester Institute of Tech.
  • Dr. Thomas Gennett
  • National Renewable Energy Laboratory
  • Nanotechnology laboratory
  • Research
  • Varying 55 different parameters
  • Maximum yield of perfect single-wall Carbon
    Nanotubes at an efficient production rate

6
Experimental Process
  • Computer program
  • SC2000
  • Digitally controlled mirror set
  • Laser beam
  • Small graphite target
  • Quartz tube filled with argon
  • Intense heat
  • Cooled collection probe

7
Laser Vaporization
8
Laser Pattern
  • Cones form on target
  • Increased metal catalyst concentration on target
    surface

9
Proposed Results for Thesis
  • Create program to improve laser pattern
  • A B

10
Outline for the Semester
  • Write program
  • Experiment with program until cones do not
    appear on target
  • Write an algorithm to allow variation in
    different fields
  • If time permits.develop a more technical
    understanding of Carbon Nanotubes
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