IR-sintering of ink-jet printed metal-nanoparticles on paper

Daniel Tobjörk, Harri Aarnio, Petri Pulkkinen, Roger Bollström, Anni Määttänen, Petri Ihalainen, Tapio Mäkelä, Jouko Peltonen, Martti Toivakka, Heikki Tenhu, Ronald Österbacka

    Research output: Contribution to journalArticleScientificpeer-review

    119 Citations (Scopus)

    Abstract

    Sintering of printed metal nanoparticles can be made not only by conventional heating, but also by, e.g., electrical, microwave, plasma, laser and flash lamp annealing. We demonstrate sintering by using low-cost incandescent lamps as an effective way of obtaining highly conductive contacts of two types of ink-jet printed metal-nanoparticle inks on paper; both alkanethiol protected gold nanoparticles and a commercially available silver nanoparticle ink. This low-cost roll-to-roll compatible sintering process is especially suitable on paper substrates because of the high diffuse reflectance, relatively high thermal stability and low thermal conductivity of paper. A volume resistivity of around 10 mu Omega cm was achieved of the inkjetted silver nanoparticles within 15 s of exposure to an IR lamp, which corresponds to a conductivity of 10-20% of that of bulk silver. Too long exposure time and too high intensity, however, lead to darkening of the paper fibers. Both the crack formation and the coffee ring effect of the inkjet printed gold nanoparticles were, furthermore, found to be reduced on paper as compared to glass or plastic substrates.
    Original languageUndefined/Unknown
    Pages (from-to)2949–2955
    Number of pages7
    JournalThin Solid Films
    Volume520
    Issue number7
    DOIs
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Absorptance
    • Infrared
    • Inkjet printing
    • Nanoparticle sintering
    • Paper substrate
    • Photothermal sintering
    • Printed electronics
    • Resistivity

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