Abstract
Ag ions were implanted into single crystals of yttria-stabilized cubic zirconia (YSZ) at 1.5 MeV to a fluence of 2×1016 ions/cm2. After implantation, heat treatments were performed at 500, 900, and 1000 °C in air. The surface color tone markedly changed from brown to a beautiful violet after heat treatments. Scanning transmission electron microscope (STEM) observations revealed that Ag nanoparticles were formed when samples were heated at temperatures higher than about 900 °C. The absorption spectrum in the visible region was measured. A large absorption peak appeared at 510 nm after heating at 900 °C. The peak could be attributed to the surface plasmon resonance of Ag nanoparticles.
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