Fabrication of carbon nanotube based transparent conductive thin films using layer-by-layer technology

This paper presents a simple and convenient process for the fabrication of carbon nanotube based optically transparent and electrically conductive thin films. Single-walled carbon nanotubes (SWNTs) are chemically treated to introduce negatively charged carboxylic groups on their surfaces, so that a...

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Bibliographic Details
Published in:Surface & coatings technology 2008-02, Vol.202 (10), p.2002-2007
Main Authors: Yu, X., Rajamani, R., Stelson, K.A., Cui, T.
Format: Article
Language:English
Subjects:
Carbon nanotube
Conductive
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Nanoassembly
Physics
Surface treatments
Thin films
Transparent
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Summary:This paper presents a simple and convenient process for the fabrication of carbon nanotube based optically transparent and electrically conductive thin films. Single-walled carbon nanotubes (SWNTs) are chemically treated to introduce negatively charged carboxylic groups on their surfaces, so that a stable SWNT aqueous dispersion can be obtained without any surfactant. The substrate surface is modified by a layer-by-layer nanoassembly technique, in which a positively charged hydrophilic polymer molecular layer is formed on the top of the substrate. This helps the SWNT dispersion to be cast onto the substrate using convenient wet coating techniques and increases the bonding force between the thin films and the substrates. Using the developed process, large sizes of conductive pure SWNT thin films that are uniform and highly transparent have been fabricated.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2007.08.064