Journalartikel

Jahr der Veröffentlichung: 2015

Seiten: 96-107

Zeitschrift: Thin Solid Films

Bandnummer: 595

Heftnummer: A

ISSN: 0040-6090

Open Access Status: Green

DOI Link: https://doi.org/10.1016/j.tsf.2015.10.059

Verlag: Elsevier

Abstract: 
For the purpose of preparing TCCs (= transparent and electrical
conducting coatings), metallic and ferromagnetic nano-additives were
dispersed into a transparent varnish and the obtained dispersions were
coated on transparent plastic substrates. During hardening of the
dispersion the magnetic nano-additives were aligned by a magnetic field.
The resulting coatings have electrical pathways along lines of
nano-additive chains and are highly transparent in the areas between the
lines. Therefore, the electrical conductivity is anisotropic, and it
depends on the alignment of the nano-additives (i.e. on the distance
between the nano-additives within the chains and the length of the
lines) as well as on the thickness of an oxide and/or solvent shell
around the nano-additives. The transparency depends also on the
alignment and here especially on the thickness and the distance between
the formed lines. The quality of the alignment in turn, depends on the
magnetic properties and on the size of the particles. We used commercial
plastic varnishes, which form electrically isolating (≥ 10^− 12 S/m) and transparent (about 90% transparency) coatings, and the following magnetic additives: Co-, Fe-, CoPt₃, CoPt₃@Au-
and Fe@Au-nanoparticles as well as CoNi-nanowires. Coatings with
Fe@Au-nanoparticles show the best results in terms of the electrical
conductivity (10^− 5 S/m–10^− 6 S/m) at transparencies above 70%. Furthermore, in addition to the magnetic nano-additives, transparent additives (Al₂O₃-particles)
and non-magnetic, but better conducting additives (carbon-nanotubes)
were added to the varnish to increase the transparency and the
electrical conductivity, respectively.

Harvard-Zitierstil: Beck, G., Barcikowski, S., Chakravadhanula, V., Comesaña-Hermo, M., Deng, M., Farle, M., et al. (2015) An approach for transparent and electrically conducting coatings: A transparent plastic varnish with nanoparticulate magnetic additives, Thin Solid Films, 595(A), pp. 96-107. https://doi.org/10.1016/j.tsf.2015.10.059

APA-Zitierstil: Beck, G., Barcikowski, S., Chakravadhanula, V., Comesaña-Hermo, M., Deng, M., Farle, M., Hilgendorff, M., Jakobi, J., Janek, J., Kienle, L., Mogwitz, B., Schubert, T., & Stiemke, F. (2015). An approach for transparent and electrically conducting coatings: A transparent plastic varnish with nanoparticulate magnetic additives. Thin Solid Films. 595(A), 96-107. https://doi.org/10.1016/j.tsf.2015.10.059