| 초록 |
Nanoscale metals are prone to chemical and electrochemical attack under various surrounding conditions. For example, noble metals such as silver can suffer from corrosion or smudge in the presence of chloride or sulfur. Conductive polypyrrole (PPy) can be coated on the metal surface as a protective coating layer, which can provide many beneficial effects against corrosion. Here, we report a study on the ability of ultrathin PPy layers to protect silver nanoparticles from external chemical attack such as electrochemical corrosion and sulfur tarnishing. Specifically, silver-PPy core-shell nanoparticles were obtained in the form of a stable colloidal suspension through a simple one-pot synthesis. A silver precursor acted as an oxidizing agent for the chemical polymerization of pyrrole, making it possible to simply form the core-shell nanoparticles. It turned out that the conjugated polymer coating can provide electrical, chemical, and physical barrier effects for anticorrosion activities under appropriate conditions. As a result, the combination of metals and conjugated polymers at the nanoscale is of great significance and has promising potential applications in the fields of microelectronics, sensors and energy devices. |
