Development of a Gold Nanoparticle Conductive Ink with a Relatively Low Sintering Temperature

摘要

We developed a conductive gold nanoparticle ink with a relatively low sintering temperature that can be used to print different kinds of conductive tracks or electrodes on low-cost polymer substrates. The dependence of the specific resistivity p on the sintering temperature was investigated and it could be concluded that the sintered layers exhibit a good conductivity already at temperatures as low as 140 °C, much lower than commercially available products. Using this ink it was possible to print high resolution conductive patterns on the micrometer scale with thicknesses of around 70 nm. Hence, this ink can be used for printing interdigitated electrodes (IDEs) as well as microelectrode arrays (MEAs) to perform electrochemical measurements and experiments with living cells.