Transcript Synthesis of Carbon nanotubes by chemical vapor deposition

Synthesis of Carbon nanotubes
by Chemical Vapor Deposition
Amit Khosla
Mechanical Engineering
University of Colorado
Advisor: Prof. Roop. L. Mahajan
1 Introduction to Research- MCEN 5028
Introduction -Carbon Nanotubes
Carbon nanotubes, long, thin cylinders of
carbon, were discovered in 1991 by S. Iijima
They can be thought of as a sheet of graphite
(hexagonal lattice of carbon) rolled into cylinder
Mechanical property- Young Modulus of 1TPA
Electronic Properties- Semiconductor or metal
Thermal Properties- Conductivity at room
temperature- 3000 W/ m.k
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Introduction to Research- MCEN 5028
Motivation
To have an in house facility to produce
carbon nanotubes for development of
 Thermal interface material using structured
carbon nanotube arrays
 Carbon nanotube-epoxy composites
 Carbon nanotube based paint
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Introduction to Research- MCEN 5028
Research Approach
Chemical vapor deposition set up
Parameters to be varied are:
Temperature , Mass Flow Rate, Hydrocarbon source, Carrier
gas, Deposition Metal
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Introduction to Research- MCEN 5028
Synthesis: CVD
•Large scale possible
•Relatively cheap
•SWNTs / MWNTs
•Aligned nanotubes
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Introduction to Research- MCEN 5028
Schedule
Task
Sep-Oct’04
Nov-Dec’04
Literature
Review
Design and
build Set up
Experiments
Analysis
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Introduction to Research- MCEN 5028
Jan-Feb’05
Mar-Apr’05