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Journal of Nanomaterials
Volume 2015, Article ID 518589, 8 pages
Research Article

Transparent Conductive Films of Copper Nanofiber Network Fabricated by Electrospinning

1Graduate School of Advanced Circuit Substrate Engineering, Chungnam National University, Daejeon 305-764, Republic of Korea
2Department of Materials Science and Engineering, Chungnam National University, Daejeon 305-764, Republic of Korea

Received 31 July 2015; Accepted 4 October 2015

Academic Editor: Albert Nasibulin

Copyright © 2015 Sungyeoul Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Cu nanofiber networks can be a good alternative of the Ag nanowire of high electrical conductivity while having the advantage of low price. An electrospinning method was developed to fabricate copper nanofiber network for use as a transparent conductive film on glass substrate. The effects of liquid diluents for electrospinning processability were examined in relation to the subsequent Cu nanofiber formation processes. Electrospinning solutions of copper acetate/polyvinyl alcohol (PVA) and copper nitrate trihydrate/polyvinyl butyral (PVB) were investigated. The polymer mixing solutions influenced the subsequent annealing temperatures for removal of the polymers and reduction of the formed CuO nanofibers to Cu metal nanofibers. The morphology and structures of the formed nanofiber networks were examined by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and so forth. The mixture with PVB provided lower annealing temperatures suitable for application to flexible substrates.