Title
Kinetics of laser-assisted carbon nanotube growth
Author
van de Burgt, Y.
Bellouard, Y.
Mandamparambil, R.
Publication year
2014
Abstract
Laser-assisted chemical vapour deposition (CVD) growth is an attractive mask-less process for growing locally aligned carbon nanotubes (CNTs) in selected places on temperature sensitive substrates. The nature of the localized process results in fast carbon nanotube growth with high experimental throughput. Here, we report on the detailed investigation of growth kinetics related to physical and chemical process characteristics. Specifically, the growth kinetics is investigated by monitoring the dynamical changes in reflected laser beam intensity during growth. Benefiting from the fast growth and high experimental throughput, we investigate a wide range of experimental conditions and propose several growth regimes. Rate-limiting steps are determined using rate equations linked to the proposed growth regimes, which are further characterized by Raman spectroscopy and Scanning Electron Microscopy (SEM), therefore directly linking growth regimes to the structural quality of the CNTs. Activation energies for the different regimes are found to be in the range of 0.3-0.8 eV. © 2014 the Owner Societies.
Subject
Mechanics, Materials and Structures
HOL - Holst
TS - Technical Sciences
Physics Energy Nanotechnology
Industrial Innovation
Chemical vapor deposition
CVD
Carbon nanotubes
CNTs
Laser assisted
Kinetics
Raman spectroscopy
Scanning electron microscopy
SEM
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http://resolver.tudelft.nl/uuid:5337fad3-eacc-4b3c-85f8-abb50f660fdf
DOI
https://doi.org/10.1039/c4cp00061g
TNO identifier
492952
ISSN
1463-9076
Source
Physical Chemistry Chemical Physics, 16 (11), 5162-5173
Document type
article