Laser Synthesis of Single Wall Carbon Nanotubes

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Laser Synthesis of Single Wall Carbon Nanotubes

• By Katie Chapin

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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

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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

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Functions of a Carbon Nanotube

• Storage
• Hydrogen
• Efficient light source
• Semiconductor
• High-strength capabilities

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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

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Experimental Process

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

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Laser Vaporization
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Laser Pattern

• Cones form on target
• Increased metal catalyst concentration on target
  surface

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Proposed Results for Thesis

• Create program to improve laser pattern
• A B

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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