| 초록 |
Gold patterns were prepared via microcontact printing of γ-APS on polyimide film, followed by shaking assisted layer-by-layer deposition of gold nanoparticles (GNPs) and sintering. First, 20 mM γ-APS was spin coated on PDMS stamp, followed by microcontact printing for 30 min on water plasma etched polyimide film. Then, multilayer of GNPs was formed on the γ-APS patterns via layer-by-layer deposition of negatively charged GNPs and positively charged 1,2-ethylenediamine under shaking at 120 rpm for 10 and 5 min, respectively. Thirdly, sintering was carried out at 150 oC for 1 hr to afford solid gold patterns. Finally, the samples were characterized by FESEM, AFM, Uv-vis/near-IR spectrometer, optical microscope and electrical conductivity measurement via 4-point probe method, exhibiting nice gold patterns of 20-layer GNP with electrical conductivity of 2x105 Ω-1cm-1. |
