Abstract
Due to their complex formulation, conductive nanoparticle inks for inkjet printing are limited in terms of the types of metals and substrates that can be utilized. A new and simplified class of inks called metal salt decomposition (MSD) inks has the potential to introduce a multitude of metals, which can be printed directly onto a wide range of substrates. Here, the use of atmospheric oxygen plasma to develop polycrystalline Au and Pt films at processing temperatures near room temperature (≈33 °C) with excellent conductivities up to 105 S m−1 is demonstrated. The conformal nature of the ink allows metal films to be printed onto a broad range of temperature‐sensitive substrates including polymers, papers, and fabric. The Au ink is then used to build a simple light‐emitting diode circuit showing its flexibility, durability, and long‐term stability as deposited thin metal films. Additionally, such inks cost less than one‐third the price of similar nanoparticle inks highlighting their overall affordability and good stability.
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