Abstract
This paper reports the formation of self-organised surface morphological features on silica irradiated with MeV energy gold ions. Amorphous silica substrates were irradiated with 1.8MeV gold ions at normal incidence at room temperature to various doses in the range of 5×1016ions/cm2 to 2×1017ions/cm2. The formation of a periodic surface pattern with a wavelength of 1.35μm was observed at an irradiation dose of 1×1017ions/cm2. The observation of surface segregation of gold at around the same dose suggests possible role of surface stresses caused by the incorporation of metal atoms in the formation of the observed periodic surface morphology.
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