Used in electronics for reliable, corrosion-resistant connections in connectors, switches, and printed circuit boards. Widely applied in dentistry for crowns and bridges due to biocompatibility and resistance to tarnish. Serves as a catalyst in chemical reactions, especially in oxidation processes and environmental cleanup technologies. Employed in nanotechnology, where gold nanoparticles are used in medical diagnostics, drug delivery, and cancer treatment. Utilized in aerospace for coating components to reflect infrared radiation and resist corrosion in extreme conditions. Common in jewelry and decorative arts for its luster, malleability, and resistance to fading. Used in central banking and investment as a form of financial reserve and asset protection.