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Influence of electric field on separation and orientation of carbon nanotubes in spray coated layers

Grzegorz Wroblewski (Institute of Metrology and Biomedical Engineering, Warsaw University of Technology, Warsaw, Poland)
Marcin Słoma (Institute of Metrology and Biomedical Engineering, Warsaw University of Technology, Warsaw, Poland AND Institute of Electronic Materials Technology, Warsaw, Poland)
Daniel Janczak (Institute of Metrology and Biomedical Engineering, Warsaw University of Technology, Warsaw, Poland)
Malgorzata Jakubowska (Institute of Metrology and Biomedical Engineering, Warsaw University of Technology, Warsaw, Poland AND Institute of Electronic Materials Technology, Warsaw, Poland)

Circuit World

ISSN: 0305-6120

Article publication date: 3 August 2015

228

Abstract

Purpose

The aims of this paper are to investigate the influence of direct current (DC) electric field on separation and orientation of carbon nanotubes (CNTs) in spray-coated layers and apply this method to the fabrication of elastic and transparent electrodes. The orientation of CNTs in the form of paths in the direction of electrical conduction should increase the electrode conductivity without decreasing its optical transmission.

Design/methodology/approach

Materials are deposited using vacuum-free, ultra-fine nozzle spray coating technique, easily applicable for large-scale production. After the deposition of carbon nanomaterials, nanoparticles are oriented in the electric field and initially cured with infrared halogen lamp to evaporate solvents and preserve orientation of the nanoparticles in the deposited layer. Afterwards, layers are cured in a chamber dryer to obtain desired properties. Nanoparticles orientation and carbon nanomaterials separation via DC electric field are analysed, and the optical and electrical properties of prepared electrodes are measured.

Findings

Experiments described in this paper showed that DC electric field can be applied provide separation and orientation of CNTs and combined with spray coating technique, can be used as additional tool for tuning the conductivity of flexible and transparent electrodes by decreasing the sheet resistance about five times.

Originality/value

The results showed that spray coating combined with electric field orientation is a promising solution of obtaining elastic and transparent electrodes with oriented carbon particles. According to the authors’ knowledge, none of the experiments was directed to obtain DC electric field-oriented transparent layers produced with the use of spray coating technique.

Keywords

Acknowledgements

This work was supported by The Polish National Centre for Research and Development through GRAF-TECH/07 and the Warsaw University of Technology, Faculty of Mechatronics Deans Grant for Junior Scientists.

Citation

Wroblewski, G., Słoma, M., Janczak, D. and Jakubowska, M. (2015), "Influence of electric field on separation and orientation of carbon nanotubes in spray coated layers", Circuit World, Vol. 41 No. 3, pp. 107-111. https://doi.org/10.1108/CW-04-2015-0014

Publisher

:

Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited

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