Abstract
Sapphire (α-Al2O3) substrates were irradiated with either swift heavy ions (208Pb and 238U) or C60 clusters at various fluences. After thin gold films deposition these samples were submitted to thermal treatments in a temperature ranging from 300°C to 800°C. Scanning electron microscopy observations show that the pre-damage enhances strongly the gold adhesion on sapphire surfaces. The thermal stability of the total wetting is increased of ≈200°C. From the different modifications induced by these pre-irradiations, the initial disorder rate seems to be the main parameter responsible by the observed effect.
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