Ion irradiation induced nano pattern formation on TiO2 single crystal |
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Authors: | Subrata Majumder D Paramanik V Solanki I Mishra DK Avasthi D Kanjilal Shikha Varma |
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Institution: | 1. Institute of Physics, Bhubaneswar, 751005, India;2. Katholieke University of Leuven, 3001 Heverlee, Belgium;3. Inter Univ. Accelerator Center, New Delhi,110067, India |
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Abstract: | Nanodots have been fabricated on rutile TiO2(1 1 0) single crystals using Ar ion beam. Ion beam sputtering creates oxygen vacancies, leading to a 45 nm thick Ti rich layer, on the surface. Post-sputtering, rutile TiO2 also exhibits a decrease in the inter planar separation along 1 1 0] direction. Additionally, blueshift in the Eg Raman mode, representing the vibrations of oxygen atoms along c-axis, is also observed. Both these results suggest the development of a compressive stress along c-axis upon sputtering. Enhancement in intensity of A1g Raman mode also indicates modification in Ti O vibrational influence. |
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