Completely green one-step fabrication of gold patterned-flexible film

We have developed a new technique for the preparation of conducting nanoparticle patterned film, which consisted of gold nanoparticles on a flexible polyethylene terephthalate substrate through a one-step straightforward procedure. The totally green approach toward the fabrication of metal-patterned flexible films ensures energy savings and reduced environmental releases by using presynthesized Au nanoparticles along with a nonhazardous reducer without employing sophisticated instruments. A favorable electrical resistivity (7.5×10−6Ωcm), which corresponds to the resistivity of bulk Au (1.3×10−6Ωcm) and good adhesiveness between Au nanoparticle layer and base material were obtained.