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

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    122 Citeringar (Scopus)

    Sammanfattning

    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.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)2949–2955
    Antal sidor7
    TidskriftThin Solid Films
    Volym520
    Utgåva7
    DOI
    StatusPublicerad - 2012
    MoE-publikationstypA1 Tidskriftsartikel-refererad

    Nyckelord

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

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