Abstract
The annealing effects on the surface plasmon resonance induced absorption band of a Ti–SiO2 nanoparticle composite have been reported. Low energy ion implantation followed by thermal annealing is found to improve the surface plasmon resonance (SPR) absorption of Ti nanoparticles, a result that is different from substrate heating during implantation. The SPR absorption becomes distinguishable when the temperature is greater than 200°C and reaches its maximum at ∼600°C. The intensity decreases significantly at higher temperatures due to high temperature enhanced diffusion which lowers the local Ti concentration and the possible formation of titanium oxides and silicides. A blueshift of the SPR absorption induced by annealing is also observed.
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