Water-based carbon-coated copper nanoparticle fluid: Formation of conductive layers at low temperature by spin coating and inkjet deposition

Kim Eiroma, J. Forsman, E.-L. Hult, Ari Auvinen, Thea Sipiläinen-Malm, Ari Alastalo, Unto Tapper, Jaakko Leppäniemi, Pauliina Mattila, Jussi Lyyränen, J. Sarlin, J. Jokiniemi, S. Mössmer

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A conductive inkjettable fluid was formulated based on carbon-coated copper nanoparticles. The copper particles were produced by vapor-phase reduction of copper chloride and coated in situ with carbon. The average particle size was 44-88 nm depending on the chosen production parameters. The optimized fluid was a water/ethylene glycol monobutyl ether/n-propanol mixture with 25 wt% nanoparticles, stabilized by a polymeric dispersing agent. A conductivity of 6.4 S/m was obtained with a single deposited layer without sintering or high-temperature annealing. The materials are interesting for several applications such as antistatic coatings, resistors, and sensors.
Original languageEnglish
Number of pages10
JournalJournal of Imaging Science and Technology
Issue number4
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed


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