Exploring growth kinetics of carbon nanotube arrays by in situ optical diagnostics and modeling

A. A. Puretzky; D. B. Geohegan; S. Pannala; C. M. Rouleau

doi:10.1117/12.2045949

7 March 2014 Exploring growth kinetics of carbon nanotube arrays by in situ optical diagnostics and modeling

A. A. Puretzky, D. B. Geohegan, S. Pannala, C. M. Rouleau

Proceedings Volume 8969, Synthesis and Photonics of Nanoscale Materials XI; 896904 (2014) https://doi.org/10.1117/12.2045949
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Simple kinetic models of carbon nanotube growth have been able to successfully link together many experimental parameters involved in the growth of carbon nanotubes for practical applications including the prediction of growth rates, terminal lengths, number of walls, activation energies, and their dependences on the growth environment. The implications of recent experiments utilizing in situ monitoring of carbon nanotube growth on our past kinetic model are first reviewed. Then, sub-second pulsed feedstock gas introduction is discussed to explore the nucleation and initial growth of carbon nanotubes in the context of the kinetic model. Moreover, kinetic effects in "pulsed CVD" - using repeated pulsed gas introduction to stop and restart nanotube growth - are explored to understand renucleation, the origin of alignment in nanotube arrays, and incremental growth. Time-resolved reflectivity of the surface is used to remotely understand the kinetics of nucleation and the coordinated growth of arrays. This approach demonstrates that continuous vertically aligned single wall carbon nanotubes can be grown incrementally by pulsed CVD, and that the first exposure of fresh catalyst to feedstock gas is critical to nanotubes site density required for coordinated growth. Aligned nanotube arrays (as short as 60 nm) are shown to nucleate and grow within single, sub-second gas pulses. The multiple-pulse growth experiments (> 100 pulses) show that a high fraction of nanotubes renucleate on subsequent gas pulses.

Citation Download Citation

A. A. Puretzky, D. B. Geohegan, S. Pannala, and C. M. Rouleau "Exploring growth kinetics of carbon nanotube arrays by in situ optical diagnostics and modeling", Proc. SPIE 8969, Synthesis and Photonics of Nanoscale Materials XI, 896904 (7 March 2014); https://doi.org/10.1117/12.2045949

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Nanoparticles

Carbon nanotubes

Carbon

Chemical vapor deposition

Single walled carbon nanotubes

Diffusion

Chemical species

Show All Keywords

Keywords/Phrases

Search In:

Publication Years