| 초록 |
We investigated the crystallization behavior of salts of sodium carbonate (Na2CO3) from the dilute solutions by varying their concentration, humidity, and temperature. The solution coated on a substrate by dropping, as the solvent evaporated, formed seaweed-like crystals over the whole surface area. It was also found that thickness and grain size of salt crystals could be adjustable by controlling experimental parameters. After a layer of Ag was thermally deposited on the surface where salt crystals were formed, by means of washing them in H2O, it was possible to lift off the crystals and fabricate remaining Ag network, which was not only electrically conductive, but also optically transparent. Furthermore, the salt crystals were employed as a master to produce a replica of poly(dimethyl siloxane) (PDMS) for imprinting techniques. Electrically conductive Ag inks were filled into the pores of PDMS molds and then transferred to various substrates by stamping for transparent electrodes. |
